manual-php
Version:
4,402 lines • 328 kB
HTML
<!DOCTYPE HTML>
<html lang="zh-hans" >
<head>
<meta charset="UTF-8">
<meta content="text/html; charset=utf-8" http-equiv="Content-Type">
<title>字符串 · PHP</title>
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta name="description" content="">
<meta name="generator" content="GitBook 3.2.3">
<meta name="author" content="Kuriv Vesti">
<link rel="stylesheet" href="../../../gitbook/style.css">
<link rel="stylesheet" href="../../../gitbook/gitbook-plugin-back-to-top-button/plugin.css">
<link rel="stylesheet" href="../../../gitbook/gitbook-plugin-chapter-fold/chapter-fold.css">
<link rel="stylesheet" href="../../../gitbook/gitbook-plugin-lightbox/css/lightbox.min.css">
<link rel="stylesheet" href="../../../gitbook/gitbook-plugin-prism/prism-okaidia.css">
<link rel="stylesheet" href="../../../gitbook/gitbook-plugin-search-pro/search.css">
<link rel="stylesheet" href="../../../gitbook/gitbook-plugin-splitter/splitter.css">
<link rel="stylesheet" href="../../../gitbook/gitbook-plugin-fontsettings/website.css">
<meta name="HandheldFriendly" content="true"/>
<meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=no">
<meta name="apple-mobile-web-app-capable" content="yes">
<meta name="apple-mobile-web-app-status-bar-style" content="black">
<link rel="apple-touch-icon-precomposed" sizes="152x152" href="../../../gitbook/images/apple-touch-icon-precomposed-152.png">
<link rel="shortcut icon" href="../../../gitbook/images/favicon.ico" type="image/x-icon">
<link rel="next" href="../变量与类型相关扩展.html" />
<link rel="prev" href="正则表达式.html" />
<link rel="shortcut icon" href='../../../favicon.ico' type="image/x-icon">
<link rel="bookmark" href='../../../favicon.ico' type="image/x-icon">
<link rel="apple-touch-icon" href='../../../favicon.png'>
<link rel="apple-touch-icon" sizes="120x120" href="../../../favicon-120x120.png">
<link rel="apple-touch-icon" sizes="180x180" href="../../../favicon-180x180.png">
</head>
<body>
<div class="book">
<div class="book-summary">
<div id="book-search-input" role="search">
<input type="text" placeholder="输入并搜索" />
</div>
<nav role="navigation">
<ul class="summary">
<li class="chapter " data-level="1.1" data-path="../../../">
<a href="../../../">
PHP
</a>
<ul class="articles">
<li class="chapter " data-level="1.1.1" data-path="../../语言参考.html">
<a href="../../语言参考.html">
语言参考
</a>
<ul class="articles">
<li class="chapter " data-level="1.1.1.1" data-path="../../语言参考/基本语法.html">
<a href="../../语言参考/基本语法.html">
基本语法
</a>
<ul class="articles">
<li class="chapter " data-level="1.1.1.1.1" data-path="../../语言参考/基本语法/PHP 标记.html">
<a href="../../语言参考/基本语法/PHP 标记.html">
PHP 标记
</a>
</li>
<li class="chapter " data-level="1.1.1.1.2" data-path="../../语言参考/基本语法/从 HTML 中分离.html">
<a href="../../语言参考/基本语法/从 HTML 中分离.html">
从 HTML 中分离
</a>
</li>
<li class="chapter " data-level="1.1.1.1.3" data-path="../../语言参考/基本语法/指令分隔符.html">
<a href="../../语言参考/基本语法/指令分隔符.html">
指令分隔符
</a>
</li>
<li class="chapter " data-level="1.1.1.1.4" data-path="../../语言参考/基本语法/注释.html">
<a href="../../语言参考/基本语法/注释.html">
注释
</a>
</li>
</ul>
</li>
<li class="chapter " data-level="1.1.1.2" data-path="../../语言参考/类型.html">
<a href="../../语言参考/类型.html">
类型
</a>
<ul class="articles">
<li class="chapter " data-level="1.1.1.2.1" data-path="../../语言参考/类型/Boolean 布尔类型.html">
<a href="../../语言参考/类型/Boolean 布尔类型.html">
Boolean 布尔类型
</a>
</li>
<li class="chapter " data-level="1.1.1.2.2" data-path="../../语言参考/类型/Integer 整型.html">
<a href="../../语言参考/类型/Integer 整型.html">
Integer 整型
</a>
</li>
<li class="chapter " data-level="1.1.1.2.3" data-path="../../语言参考/类型/Float 浮点型.html">
<a href="../../语言参考/类型/Float 浮点型.html">
Float 浮点型
</a>
</li>
<li class="chapter " data-level="1.1.1.2.4" data-path="../../语言参考/类型/String 字符串.html">
<a href="../../语言参考/类型/String 字符串.html">
String 字符串
</a>
</li>
<li class="chapter " data-level="1.1.1.2.5" data-path="../../语言参考/类型/Array 数组.html">
<a href="../../语言参考/类型/Array 数组.html">
Array 数组
</a>
</li>
<li class="chapter " data-level="1.1.1.2.6" data-path="../../语言参考/类型/Object 对象.html">
<a href="../../语言参考/类型/Object 对象.html">
Object 对象
</a>
</li>
<li class="chapter " data-level="1.1.1.2.7" data-path="../../语言参考/类型/Resource 资源类型.html">
<a href="../../语言参考/类型/Resource 资源类型.html">
Resource 资源类型
</a>
</li>
<li class="chapter " data-level="1.1.1.2.8" data-path="../../语言参考/类型/NULL.html">
<a href="../../语言参考/类型/NULL.html">
NULL
</a>
</li>
<li class="chapter " data-level="1.1.1.2.9" data-path="../../语言参考/类型/Callable 可调用类型.html">
<a href="../../语言参考/类型/Callable 可调用类型.html">
Callable 可调用类型
</a>
</li>
<li class="chapter " data-level="1.1.1.2.10" data-path="../../语言参考/类型/类型转换的判别.html">
<a href="../../语言参考/类型/类型转换的判别.html">
类型转换的判别
</a>
</li>
</ul>
</li>
<li class="chapter " data-level="1.1.1.3" data-path="../../语言参考/变量.html">
<a href="../../语言参考/变量.html">
变量
</a>
<ul class="articles">
<li class="chapter " data-level="1.1.1.3.1" data-path="../../语言参考/变量/基本语法.html">
<a href="../../语言参考/变量/基本语法.html">
基本语法
</a>
</li>
<li class="chapter " data-level="1.1.1.3.2" data-path="../../语言参考/变量/变量范围.html">
<a href="../../语言参考/变量/变量范围.html">
变量范围
</a>
</li>
<li class="chapter " data-level="1.1.1.3.3" data-path="../../语言参考/变量/可变变量.html">
<a href="../../语言参考/变量/可变变量.html">
可变变量
</a>
</li>
<li class="chapter " data-level="1.1.1.3.4" data-path="../../语言参考/变量/来自 PHP 之外的变量.html">
<a href="../../语言参考/变量/来自 PHP 之外的变量.html">
来自 PHP 之外的变量
</a>
</li>
</ul>
</li>
<li class="chapter " data-level="1.1.1.4" data-path="../../语言参考/常量.html">
<a href="../../语言参考/常量.html">
常量
</a>
<ul class="articles">
<li class="chapter " data-level="1.1.1.4.1" data-path="../../语言参考/常量/基本语法.html">
<a href="../../语言参考/常量/基本语法.html">
基本语法
</a>
</li>
<li class="chapter " data-level="1.1.1.4.2" data-path="../../语言参考/常量/魔术常量.html">
<a href="../../语言参考/常量/魔术常量.html">
魔术常量
</a>
</li>
</ul>
</li>
<li class="chapter " data-level="1.1.1.5" data-path="../../语言参考/表达式.html">
<a href="../../语言参考/表达式.html">
表达式
</a>
</li>
<li class="chapter " data-level="1.1.1.6" data-path="../../语言参考/运算符.html">
<a href="../../语言参考/运算符.html">
运算符
</a>
<ul class="articles">
<li class="chapter " data-level="1.1.1.6.1" data-path="../../语言参考/运算符/运算符优先级.html">
<a href="../../语言参考/运算符/运算符优先级.html">
运算符优先级
</a>
</li>
<li class="chapter " data-level="1.1.1.6.2" data-path="../../语言参考/运算符/算数运算符.html">
<a href="../../语言参考/运算符/算数运算符.html">
算数运算符
</a>
</li>
<li class="chapter " data-level="1.1.1.6.3" data-path="../../语言参考/运算符/赋值运算符.html">
<a href="../../语言参考/运算符/赋值运算符.html">
赋值运算符
</a>
</li>
<li class="chapter " data-level="1.1.1.6.4" data-path="../../语言参考/运算符/位运算符.html">
<a href="../../语言参考/运算符/位运算符.html">
位运算符
</a>
</li>
<li class="chapter " data-level="1.1.1.6.5" data-path="../../语言参考/运算符/比较运算符.html">
<a href="../../语言参考/运算符/比较运算符.html">
比较运算符
</a>
</li>
<li class="chapter " data-level="1.1.1.6.6" data-path="../../语言参考/运算符/错误控制运算符.html">
<a href="../../语言参考/运算符/错误控制运算符.html">
错误控制运算符
</a>
</li>
<li class="chapter " data-level="1.1.1.6.7" data-path="../../语言参考/运算符/执行运算符.html">
<a href="../../语言参考/运算符/执行运算符.html">
执行运算符
</a>
</li>
<li class="chapter " data-level="1.1.1.6.8" data-path="../../语言参考/运算符/递增递减运算符.html">
<a href="../../语言参考/运算符/递增递减运算符.html">
递增递减运算符
</a>
</li>
<li class="chapter " data-level="1.1.1.6.9" data-path="../../语言参考/运算符/逻辑运算符.html">
<a href="../../语言参考/运算符/逻辑运算符.html">
逻辑运算符
</a>
</li>
<li class="chapter " data-level="1.1.1.6.10" data-path="../../语言参考/运算符/字符串运算符.html">
<a href="../../语言参考/运算符/字符串运算符.html">
字符串运算符
</a>
</li>
<li class="chapter " data-level="1.1.1.6.11" data-path="../../语言参考/运算符/数组运算符.html">
<a href="../../语言参考/运算符/数组运算符.html">
数组运算符
</a>
</li>
<li class="chapter " data-level="1.1.1.6.12" data-path="../../语言参考/运算符/类型运算符.html">
<a href="../../语言参考/运算符/类型运算符.html">
类型运算符
</a>
</li>
</ul>
</li>
<li class="chapter " data-level="1.1.1.7" data-path="../../语言参考/流程控制.html">
<a href="../../语言参考/流程控制.html">
流程控制
</a>
<ul class="articles">
<li class="chapter " data-level="1.1.1.7.1" data-path="../../语言参考/流程控制/if.html">
<a href="../../语言参考/流程控制/if.html">
if
</a>
</li>
<li class="chapter " data-level="1.1.1.7.2" data-path="../../语言参考/流程控制/else.html">
<a href="../../语言参考/流程控制/else.html">
else
</a>
</li>
<li class="chapter " data-level="1.1.1.7.3" data-path="../../语言参考/流程控制/elseif.html">
<a href="../../语言参考/流程控制/elseif.html">
elseif
</a>
</li>
<li class="chapter " data-level="1.1.1.7.4" data-path="../../语言参考/流程控制/while.html">
<a href="../../语言参考/流程控制/while.html">
while
</a>
</li>
<li class="chapter " data-level="1.1.1.7.5" data-path="../../语言参考/流程控制/do-while.html">
<a href="../../语言参考/流程控制/do-while.html">
do-while
</a>
</li>
<li class="chapter " data-level="1.1.1.7.6" data-path="../../语言参考/流程控制/for.html">
<a href="../../语言参考/流程控制/for.html">
for
</a>
</li>
<li class="chapter " data-level="1.1.1.7.7" data-path="../../语言参考/流程控制/foreach.html">
<a href="../../语言参考/流程控制/foreach.html">
foreach
</a>
</li>
<li class="chapter " data-level="1.1.1.7.8" data-path="../../语言参考/流程控制/switch.html">
<a href="../../语言参考/流程控制/switch.html">
switch
</a>
</li>
<li class="chapter " data-level="1.1.1.7.9" data-path="../../语言参考/流程控制/break.html">
<a href="../../语言参考/流程控制/break.html">
break
</a>
</li>
<li class="chapter " data-level="1.1.1.7.10" data-path="../../语言参考/流程控制/continue.html">
<a href="../../语言参考/流程控制/continue.html">
continue
</a>
</li>
<li class="chapter " data-level="1.1.1.7.11" data-path="../../语言参考/流程控制/流程控制的替代语法.html">
<a href="../../语言参考/流程控制/流程控制的替代语法.html">
流程控制的替代语法
</a>
</li>
<li class="chapter " data-level="1.1.1.7.12" data-path="../../语言参考/流程控制/declare.html">
<a href="../../语言参考/流程控制/declare.html">
declare
</a>
</li>
<li class="chapter " data-level="1.1.1.7.13" data-path="../../语言参考/流程控制/return.html">
<a href="../../语言参考/流程控制/return.html">
return
</a>
</li>
<li class="chapter " data-level="1.1.1.7.14" data-path="../../语言参考/流程控制/require.html">
<a href="../../语言参考/流程控制/require.html">
require
</a>
</li>
<li class="chapter " data-level="1.1.1.7.15" data-path="../../语言参考/流程控制/include.html">
<a href="../../语言参考/流程控制/include.html">
include
</a>
</li>
<li class="chapter " data-level="1.1.1.7.16" data-path="../../语言参考/流程控制/require_once.html">
<a href="../../语言参考/流程控制/require_once.html">
require_once
</a>
</li>
<li class="chapter " data-level="1.1.1.7.17" data-path="../../语言参考/流程控制/include_once.html">
<a href="../../语言参考/流程控制/include_once.html">
include_once
</a>
</li>
<li class="chapter " data-level="1.1.1.7.18" data-path="../../语言参考/流程控制/goto.html">
<a href="../../语言参考/流程控制/goto.html">
goto
</a>
</li>
</ul>
</li>
<li class="chapter " data-level="1.1.1.8" data-path="../../语言参考/函数.html">
<a href="../../语言参考/函数.html">
函数
</a>
<ul class="articles">
<li class="chapter " data-level="1.1.1.8.1" data-path="../../语言参考/函数/用户自定义函数.html">
<a href="../../语言参考/函数/用户自定义函数.html">
用户自定义函数
</a>
</li>
<li class="chapter " data-level="1.1.1.8.2" data-path="../../语言参考/函数/函数的参数.html">
<a href="../../语言参考/函数/函数的参数.html">
函数的参数
</a>
</li>
<li class="chapter " data-level="1.1.1.8.3" data-path="../../语言参考/函数/返回值.html">
<a href="../../语言参考/函数/返回值.html">
返回值
</a>
</li>
<li class="chapter " data-level="1.1.1.8.4" data-path="../../语言参考/函数/可变函数.html">
<a href="../../语言参考/函数/可变函数.html">
可变函数
</a>
</li>
<li class="chapter " data-level="1.1.1.8.5" data-path="../../语言参考/函数/匿名函数.html">
<a href="../../语言参考/函数/匿名函数.html">
匿名函数
</a>
</li>
</ul>
</li>
<li class="chapter " data-level="1.1.1.9" data-path="../../语言参考/类与对象.html">
<a href="../../语言参考/类与对象.html">
类与对象
</a>
<ul class="articles">
<li class="chapter " data-level="1.1.1.9.1" data-path="../../语言参考/类与对象/基本语法.html">
<a href="../../语言参考/类与对象/基本语法.html">
基本语法
</a>
</li>
<li class="chapter " data-level="1.1.1.9.2" data-path="../../语言参考/类与对象/属性.html">
<a href="../../语言参考/类与对象/属性.html">
属性
</a>
</li>
<li class="chapter " data-level="1.1.1.9.3" data-path="../../语言参考/类与对象/类常量.html">
<a href="../../语言参考/类与对象/类常量.html">
类常量
</a>
</li>
<li class="chapter " data-level="1.1.1.9.4" data-path="../../语言参考/类与对象/类的自动加载.html">
<a href="../../语言参考/类与对象/类的自动加载.html">
类的自动加载
</a>
</li>
<li class="chapter " data-level="1.1.1.9.5" data-path="../../语言参考/类与对象/构造函数和析构函数.html">
<a href="../../语言参考/类与对象/构造函数和析构函数.html">
构造函数和析构函数
</a>
</li>
<li class="chapter " data-level="1.1.1.9.6" data-path="../../语言参考/类与对象/访问控制.html">
<a href="../../语言参考/类与对象/访问控制.html">
访问控制
</a>
</li>
<li class="chapter " data-level="1.1.1.9.7" data-path="../../语言参考/类与对象/对象继承.html">
<a href="../../语言参考/类与对象/对象继承.html">
对象继承
</a>
</li>
<li class="chapter " data-level="1.1.1.9.8" data-path="../../语言参考/类与对象/范围解析操作符.html">
<a href="../../语言参考/类与对象/范围解析操作符.html">
范围解析操作符
</a>
</li>
<li class="chapter " data-level="1.1.1.9.9" data-path="../../语言参考/类与对象/Static 关键字.html">
<a href="../../语言参考/类与对象/Static 关键字.html">
Static 关键字
</a>
</li>
<li class="chapter " data-level="1.1.1.9.10" data-path="../../语言参考/类与对象/抽象类.html">
<a href="../../语言参考/类与对象/抽象类.html">
抽象类
</a>
</li>
<li class="chapter " data-level="1.1.1.9.11" data-path="../../语言参考/类与对象/对象接口.html">
<a href="../../语言参考/类与对象/对象接口.html">
对象接口
</a>
</li>
<li class="chapter " data-level="1.1.1.9.12" data-path="../../语言参考/类与对象/Trait.html">
<a href="../../语言参考/类与对象/Trait.html">
Trait
</a>
</li>
<li class="chapter " data-level="1.1.1.9.13" data-path="../../语言参考/类与对象/匿名类.html">
<a href="../../语言参考/类与对象/匿名类.html">
匿名类
</a>
</li>
<li class="chapter " data-level="1.1.1.9.14" data-path="../../语言参考/类与对象/重载.html">
<a href="../../语言参考/类与对象/重载.html">
重载
</a>
</li>
<li class="chapter " data-level="1.1.1.9.15" data-path="../../语言参考/类与对象/遍历对象.html">
<a href="../../语言参考/类与对象/遍历对象.html">
遍历对象
</a>
</li>
<li class="chapter " data-level="1.1.1.9.16" data-path="../../语言参考/类与对象/魔术方法.html">
<a href="../../语言参考/类与对象/魔术方法.html">
魔术方法
</a>
</li>
<li class="chapter " data-level="1.1.1.9.17" data-path="../../语言参考/类与对象/Final 关键字.html">
<a href="../../语言参考/类与对象/Final 关键字.html">
Final 关键字
</a>
</li>
<li class="chapter " data-level="1.1.1.9.18" data-path="../../语言参考/类与对象/对象复制.html">
<a href="../../语言参考/类与对象/对象复制.html">
对象复制
</a>
</li>
<li class="chapter " data-level="1.1.1.9.19" data-path="../../语言参考/类与对象/对象比较.html">
<a href="../../语言参考/类与对象/对象比较.html">
对象比较
</a>
</li>
<li class="chapter " data-level="1.1.1.9.20" data-path="../../语言参考/类与对象/类型约束.html">
<a href="../../语言参考/类与对象/类型约束.html">
类型约束
</a>
</li>
<li class="chapter " data-level="1.1.1.9.21" data-path="../../语言参考/类与对象/后期静态绑定.html">
<a href="../../语言参考/类与对象/后期静态绑定.html">
后期静态绑定
</a>
</li>
<li class="chapter " data-level="1.1.1.9.22" data-path="../../语言参考/类与对象/对象和引用.html">
<a href="../../语言参考/类与对象/对象和引用.html">
对象和引用
</a>
</li>
<li class="chapter " data-level="1.1.1.9.23" data-path="../../语言参考/类与对象/对象序列化.html">
<a href="../../语言参考/类与对象/对象序列化.html">
对象序列化
</a>
</li>
</ul>
</li>
<li class="chapter " data-level="1.1.1.10" data-path="../../语言参考/命名空间.html">
<a href="../../语言参考/命名空间.html">
命名空间
</a>
<ul class="articles">
<li class="chapter " data-level="1.1.1.10.1" data-path="../../语言参考/命名空间/基本语法.html">
<a href="../../语言参考/命名空间/基本语法.html">
基本语法
</a>
</li>
<li class="chapter " data-level="1.1.1.10.2" data-path="../../语言参考/命名空间/定义子命名空间.html">
<a href="../../语言参考/命名空间/定义子命名空间.html">
定义子命名空间
</a>
</li>
<li class="chapter " data-level="1.1.1.10.3" data-path="../../语言参考/命名空间/在同一个文件中定义多个命名空间.html">
<a href="../../语言参考/命名空间/在同一个文件中定义多个命名空间.html">
在同一个文件中定义多个命名空间
</a>
</li>
<li class="chapter " data-level="1.1.1.10.4" data-path="../../语言参考/命名空间/使用命名空间 - 基础.html">
<a href="../../语言参考/命名空间/使用命名空间 - 基础.html">
使用命名空间 - 基础
</a>
</li>
<li class="chapter " data-level="1.1.1.10.5" data-path="../../语言参考/命名空间/命名空间和动态语言特征.html">
<a href="../../语言参考/命名空间/命名空间和动态语言特征.html">
命名空间和动态语言特征
</a>
</li>
<li class="chapter " data-level="1.1.1.10.6" data-path="../../语言参考/命名空间/namespace 关键字和 __NAMESPACE__ 魔术常量.html">
<a href="../../语言参考/命名空间/namespace 关键字和 __NAMESPACE__ 魔术常量.html">
namespace 关键字和 __NAMESPACE__ 魔术常量
</a>
</li>
<li class="chapter " data-level="1.1.1.10.7" data-path="../../语言参考/命名空间/使用命名空间 - 别名和导入.html">
<a href="../../语言参考/命名空间/使用命名空间 - 别名和导入.html">
使用命名空间 - 别名和导入
</a>
</li>
<li class="chapter " data-level="1.1.1.10.8" data-path="../../语言参考/命名空间/全局空间.html">
<a href="../../语言参考/命名空间/全局空间.html">
全局空间
</a>
</li>
<li class="chapter " data-level="1.1.1.10.9" data-path="../../语言参考/命名空间/使用命名空间 - 后备全局函数和常量.html">
<a href="../../语言参考/命名空间/使用命名空间 - 后备全局函数和常量.html">
使用命名空间 - 后备全局函数和常量
</a>
</li>
<li class="chapter " data-level="1.1.1.10.10" data-path="../../语言参考/命名空间/名称解析规则.html">
<a href="../../语言参考/命名空间/名称解析规则.html">
名称解析规则
</a>
</li>
</ul>
</li>
<li class="chapter " data-level="1.1.1.11" data-path="../../语言参考/Errors.html">
<a href="../../语言参考/Errors.html">
Errors
</a>
</li>
<li class="chapter " data-level="1.1.1.12" data-path="../../语言参考/异常处理.html">
<a href="../../语言参考/异常处理.html">
异常处理
</a>
<ul class="articles">
<li class="chapter " data-level="1.1.1.12.1" data-path="../../语言参考/异常处理/基本语法.html">
<a href="../../语言参考/异常处理/基本语法.html">
基本语法
</a>
</li>
<li class="chapter " data-level="1.1.1.12.2" data-path="../../语言参考/异常处理/扩展 PHP 内置的异常处理类.html">
<a href="../../语言参考/异常处理/扩展 PHP 内置的异常处理类.html">
扩展 PHP 内置的异常处理类
</a>
</li>
</ul>
</li>
<li class="chapter " data-level="1.1.1.13" data-path="../../语言参考/生成器.html">
<a href="../../语言参考/生成器.html">
生成器
</a>
<ul class="articles">
<li class="chapter " data-level="1.1.1.13.1" data-path="../../语言参考/生成器/生成器总览.html">
<a href="../../语言参考/生成器/生成器总览.html">
生成器总览
</a>
</li>
<li class="chapter " data-level="1.1.1.13.2" data-path="../../语言参考/生成器/生成器语法.html">
<a href="../../语言参考/生成器/生成器语法.html">
生成器语法
</a>
</li>
<li class="chapter " data-level="1.1.1.13.3" data-path="../../语言参考/生成器/生成器与 Iterator 对象比较.html">
<a href="../../语言参考/生成器/生成器与 Iterator 对象比较.html">
生成器与 Iterator 对象比较
</a>
</li>
</ul>
</li>
<li class="chapter " data-level="1.1.1.14" data-path="../../语言参考/引用的解释.html">
<a href="../../语言参考/引用的解释.html">
引用的解释
</a>
<ul class="articles">
<li class="chapter " data-level="1.1.1.14.1" data-path="../../语言参考/引用的解释/引用是什么.html">
<a href="../../语言参考/引用的解释/引用是什么.html">
引用是什么
</a>
</li>
<li class="chapter " data-level="1.1.1.14.2" data-path="../../语言参考/引用的解释/引用不是什么.html">
<a href="../../语言参考/引用的解释/引用不是什么.html">
引用不是什么
</a>
</li>
<li class="chapter " data-level="1.1.1.14.3" data-path="../../语言参考/引用的解释/引用做什么.html">
<a href="../../语言参考/引用的解释/引用做什么.html">
引用做什么
</a>
</li>
<li class="chapter " data-level="1.1.1.14.4" data-path="../../语言参考/引用的解释/引用传递.html">
<a href="../../语言参考/引用的解释/引用传递.html">
引用传递
</a>
</li>
<li class="chapter " data-level="1.1.1.14.5" data-path="../../语言参考/引用的解释/引用返回.html">
<a href="../../语言参考/引用的解释/引用返回.html">
引用返回
</a>
</li>
<li class="chapter " data-level="1.1.1.14.6" data-path="../../语言参考/引用的解释/取消引用.html">
<a href="../../语言参考/引用的解释/取消引用.html">
取消引用
</a>
</li>
<li class="chapter " data-level="1.1.1.14.7" data-path="../../语言参考/引用的解释/引用定位.html">
<a href="../../语言参考/引用的解释/引用定位.html">
引用定位
</a>
</li>
</ul>
</li>
<li class="chapter " data-level="1.1.1.15" data-path="../../语言参考/预定义变量.html">
<a href="../../语言参考/预定义变量.html">
预定义变量
</a>
<ul class="articles">
<li class="chapter " data-level="1.1.1.15.1" data-path="../../语言参考/预定义变量/超全局变量.html">
<a href="../../语言参考/预定义变量/超全局变量.html">
超全局变量
</a>
</li>
<li class="chapter " data-level="1.1.1.15.2" data-path="../../语言参考/预定义变量/$GLOBALS.html">
<a href="../../语言参考/预定义变量/$GLOBALS.html">
$GLOBALS
</a>
</li>
<li class="chapter " data-level="1.1.1.15.3" data-path="../../语言参考/预定义变量/$_GET.html">
<a href="../../语言参考/预定义变量/$_GET.html">
$_GET
</a>
</li>
<li class="chapter " data-level="1.1.1.15.4" data-path="../../语言参考/预定义变量/$_POST.html">
<a href="../../语言参考/预定义变量/$_POST.html">
$_POST
</a>
</li>
<li class="chapter " data-level="1.1.1.15.5" data-path="../../语言参考/预定义变量/$_COOKIE.html">
<a href="../../语言参考/预定义变量/$_COOKIE.html">
$_COOKIE
</a>
</li>
<li class="chapter " data-level="1.1.1.15.6" data-path="../../语言参考/预定义变量/$_REQUEST.html">
<a href="../../语言参考/预定义变量/$_REQUEST.html">
$_REQUEST
</a>
</li>
<li class="chapter " data-level="1.1.1.15.7" data-path="../../语言参考/预定义变量/$_FILES.html">
<a href="../../语言参考/预定义变量/$_FILES.html">
$_FILES
</a>
</li>
<li class="chapter " data-level="1.1.1.15.8" data-path="../../语言参考/预定义变量/$_SESSION.html">
<a href="../../语言参考/预定义变量/$_SESSION.html">
$_SESSION
</a>
</li>
<li class="chapter " data-level="1.1.1.15.9" data-path="../../语言参考/预定义变量/$_SERVER.html">
<a href="../../语言参考/预定义变量/$_SERVER.html">
$_SERVER
</a>
</li>
<li class="chapter " data-level="1.1.1.15.10" data-path="../../语言参考/预定义变量/$_ENV.html">
<a href="../../语言参考/预定义变量/$_ENV.html">
$_ENV
</a>
</li>
<li class="chapter " data-level="1.1.1.15.11" data-path="../../语言参考/预定义变量/$http_response_header.html">
<a href="../../语言参考/预定义变量/$http_response_header.html">
$http_response_header
</a>
</li>
<li class="chapter " data-level="1.1.1.15.12" data-path="../../语言参考/预定义变量/$argc.html">
<a href="../../语言参考/预定义变量/$argc.html">
$argc
</a>
</li>
<li class="chapter " data-level="1.1.1.15.13" data-path="../../语言参考/预定义变量/$argv.html">
<a href="../../语言参考/预定义变量/$argv.html">
$argv
</a>
</li>
</ul>
</li>
<li class="chapter " data-level="1.1.1.16" data-path="../../语言参考/预定义异常.html">
<a href="../../语言参考/预定义异常.html">
预定义异常
</a>
<ul class="articles">
<li class="chapter " data-level="1.1.1.16.1" data-path="../../语言参考/预定义异常/Exception.html">
<a href="../../语言参考/预定义异常/Exception.html">
Exception
</a>
</li>
<li class="chapter " data-level="1.1.1.16.2" data-path="../../语言参考/预定义异常/ErrorException.html">
<a href="../../语言参考/预定义异常/ErrorException.html">
ErrorException
</a>
</li>
</ul>
</li>
<li class="chapter " data-level="1.1.1.17" data-path="../../语言参考/预定义接口.html">
<a href="../../语言参考/预定义接口.html">
预定义接口
</a>
<ul class="articles">
<li class="chapter " data-level="1.1.1.17.1" data-path="../../语言参考/预定义接口/Traversable.html">
<a href="../../语言参考/预定义接口/Traversable.html">
Traversable
</a>
</li>
<li class="chapter " data-level="1.1.1.17.2" data-path="../../语言参考/预定义接口/Iterator.html">
<a href="../../语言参考/预定义接口/Iterator.html">
Iterator
</a>
</li>
<li class="chapter " data-level="1.1.1.17.3" data-path="../../语言参考/预定义接口/IteratorAggregate.html">
<a href="../../语言参考/预定义接口/IteratorAggregate.html">
IteratorAggregate
</a>
</li>
<li class="chapter " data-level="1.1.1.17.4" data-path="../../语言参考/预定义接口/ArrayAccess.html">
<a href="../../语言参考/预定义接口/ArrayAccess.html">
ArrayAccess
</a>
</li>
<li class="chapter " data-level="1.1.1.17.5" data-path="../../语言参考/预定义接口/Serializable.html">
<a href="../../语言参考/预定义接口/Serializable.html">
Serializable
</a>
</li>
<li class="chapter " data-level="1.1.1.17.6" data-path="../../语言参考/预定义接口/Closure.html">
<a href="../../语言参考/预定义接口/Closure.html">
Closure
</a>
</li>
<li class="chapter " data-level="1.1.1.17.7" data-path="../../语言参考/预定义接口/Generator.html">
<a href="../../语言参考/预定义接口/Generator.html">
Generator
</a>
</li>
</ul>
</li>
<li class="chapter " data-level="1.1.1.18" data-path="../../语言参考/上下文选项和参数.html">
<a href="../../语言参考/上下文选项和参数.html">
上下文选项和参数
</a>
<ul class="articles">
<li class="chapter " data-level="1.1.1.18.1" data-path="../../语言参考/上下文选项和参数/套接字上下文选项.html">
<a href="../../语言参考/上下文选项和参数/套接字上下文选项.html">
套接字上下文选项
</a>
</li>
<li class="chapter " data-level="1.1.1.18.2" data-path="../../语言参考/上下文选项和参数/HTTP 上下文选项.html">
<a href="../../语言参考/上下文选项和参数/HTTP 上下文选项.html">
HTTP 上下文选项
</a>
</li>
<li class="chapter " data-level="1.1.1.18.3" data-path="../../语言参考/上下文选项和参数/FTP 上下文选项.html">
<a href="../../语言参考/上下文选项和参数/FTP 上下文选项.html">
FTP 上下文选项
</a>
</li>
<li class="chapter " data-level="1.1.1.18.4" data-path="../../语言参考/上下文选项和参数/SSL 上下文选项.html">
<a href="../../语言参考/上下文选项和参数/SSL 上下文选项.html">
SSL 上下文选项
</a>
</li>
<li class="chapter " data-level="1.1.1.18.5" data-path="../../语言参考/上下文选项和参数/CURL 上下文选项.html">
<a href="../../语言参考/上下文选项和参数/CURL 上下文选项.html">
CURL 上下文选项
</a>
</li>
<li class="chapter " data-level="1.1.1.18.6" data-path="../../语言参考/上下文选项和参数/Phar 上下文选项.html">
<a href="../../语言参考/上下文选项和参数/Phar 上下文选项.html">
Phar 上下文选项
</a>
</li>
<li class="chapter " data-level="1.1.1.18.7" data-path="../../语言参考/上下文选项和参数/MongoDB 上下文选项.html">
<a href="../../语言参考/上下文选项和参数/MongoDB 上下文选项.html">
MongoDB 上下文选项
</a>
</li>
<li class="chapter " data-level="1.1.1.18.8" data-path="../../语言参考/上下文选项和参数/Context 参数.html">
<a href="../../语言参考/上下文选项和参数/Context 参数.html">
Context 参数
</a>
</li>
</ul>
</li>
<li class="chapter " data-level="1.1.1.19" data-path="../../语言参考/支持的协议和封装协议.html">
<a href="../../语言参考/支持的协议和封装协议.html">
支持的协议和封装协议
</a>
<ul class="articles">
<li class="chapter " data-level="1.1.1.19.1" data-path="../../语言参考/支持的协议和封装协议/file.html">
<a href="../../语言参考/支持的协议和封装协议/file.html">
file://
</a>
</li>
<li class="chapter " data-level="1.1.1.19.2" data-path="../../语言参考/支持的协议和封装协议/http.html">
<a href="../../语言参考/支持的协议和封装协议/http.html">
http://
</a>
</li>
<li class="chapter " data-level="1.1.1.19.3" data-path="../../语言参考/支持的协议和封装协议/ftp.html">
<a href="../../语言参考/支持的协议和封装协议/ftp.html">
ftp://
</a>
</li>
<li class="chapter " data-level="1.1.1.19.4" data-path="../../语言参考/支持的协议和封装协议/php.html">
<a href="../../语言参考/支持的协议和封装协议/php.html">
php://
</a>
</li>
<li class="chapter " data-level="1.1.1.19.5" data-path="../../语言参考/支持的协议和封装协议/zlib.html">
<a href="../../语言参考/支持的协议和封装协议/zlib.html">
zlib://
</a>
</li>
<li class="chapter " data-level="1.1.1.19.6" data-path="../../语言参考/支持的协议和封装协议/data.html">
<a href="../../语言参考/支持的协议和封装协议/data.html">
data://
</a>
</li>
<li class="chapter " data-level="1.1.1.19.7" data-path="../../语言参考/支持的协议和封装协议/global.html">
<a href="../../语言参考/支持的协议和封装协议/global.html">
global://
</a>
</li>
<li class="chapter " data-level="1.1.1.19.8" data-path="../../语言参考/支持的协议和封装协议/phar.html">
<a href="../../语言参考/支持的协议和封装协议/phar.html">
phar://
</a>
</li>
<li class="chapter " data-level="1.1.1.19.9" data-path="../../语言参考/支持的协议和封装协议/ssh2.html">
<a href="../../语言参考/支持的协议和封装协议/ssh2.html">
ssh2://
</a>
</li>
<li class="chapter " data-level="1.1.1.19.10" data-path="../../语言参考/支持的协议和封装协议/rar.html">
<a href="../../语言参考/支持的协议和封装协议/rar.html">
rar://
</a>
</li>
<li class="chapter " data-level="1.1.1.19.11" data-path="../../语言参考/支持的协议和封装协议/ogg.html">
<a href="../../语言参考/支持的协议和封装协议/ogg.html">
ogg://
</a>
</li>
<li class="chapter " data-level="1.1.1.19.12" data-path="../../语言参考/支持的协议和封装协议/expect.html">
<a href="../../语言参考/支持的协议和封装协议/expect.html">
expect://
</a>
</li>
</ul>
</li>
</ul>
</li>
<li class="chapter " data-level="1.1.2" data-path="../../函数参考.html">
<a href="../../函数参考.html">
函数参考
</a>
<ul class="articles">
<li class="chapter " data-level="1.1.2.1" data-path="../影响 PHP 行为的扩展.html">
<a href="../影响 PHP 行为的扩展.html">
影响 PHP 行为的扩展
</a>
<ul class="articles">
<li class="chapter " data-level="1.1.2.1.1" data-path="../影响 PHP 行为的扩展/错误处理和日志记录.html">
<a href="../影响 PHP 行为的扩展/错误处理和日志记录.html">
错误处理和日志记录
</a>
</li>
<li class="chapter " data-level="1.1.2.1.2" data-path="../影响 PHP 行为的扩展/输出缓冲控制.html">
<a href="../影响 PHP 行为的扩展/输出缓冲控制.html">
输出缓冲控制
</a>
</li>
<li class="chapter " data-level="1.1.2.1.3" data-path="../影响 PHP 行为的扩展/PHP 选项和信息.html">
<a href="../影响 PHP 行为的扩展/PHP 选项和信息.html">
PHP 选项和信息
</a>
</li>
</ul>
</li>
<li class="chapter " data-level="1.1.2.2" data-path="../加密扩展.html">
<a href="../加密扩展.html">
加密扩展
</a>
<ul class="articles">
<li class="chapter " data-level="1.1.2.2.1" data-path="../加密扩展/Hash.html">
<a href="../加密扩展/Hash.html">
Hash
</a>
</li>
<li class="chapter " data-level="1.1.2.2.2" data-path="../加密扩展/OpenSSL.html">
<a href="../加密扩展/OpenSSL.html">
OpenSSL
</a>
</li>
<li class="chapter " data-level="1.1.2.2.3" data-path="../加密扩展/密码散列算法.html">
<a href="../加密扩展/密码散列算法.html">
密码散列算法
</a>
</li>
</ul>
</li>
<li class="chapter " data-level="1.1.2.3" data-path="../数据库扩展.html">
<a href="../数据库扩展.html">
数据库扩展
</a>
<ul class="articles">
<li class="chapter " data-level="1.1.2.3.1" data-path="../数据库扩展/数据库抽象层.html">
<a href="../数据库扩展/数据库抽象层.html">
数据库抽象层
</a>
<ul class="articles">
<li class="chapter " data-level="1.1.2.3.1.1" data-path="../数据库扩展/数据库抽象层/PDO.html">
<a href="../数据库扩展/数据库抽象层/PDO.html">
PDO
</a>
</li>
</ul>
</li>
</ul>
</li>
<li class="chapter " data-level="1.1.2.4" data-path="../日期与时间相关扩展.html">
<a href="../日期与时间相关扩展.html">
日期与时间相关扩展
</a>
<ul class="articles">
<li class="chapter " data-level="1.1.2.4.1" data-path="../日期与时间相关扩展/日期与时间.html">
<a href="../日期与时间相关扩展/日期与时间.html">
日期与时间
</a>
</li>
</ul>
</li>
<li class="chapter " data-level="1.1.2.5" data-path="../文件系统相关扩展.html">
<a href="../文件系统相关扩展.html">
文件系统相关扩展
</a>
<ul class="articles">
<li class="chapter " data-level="1.1.2.5.1" data-path="../文件系统相关扩展/目录.html">
<a href="../文件系统相关扩展/目录.html">
目录
</a>
</li>
<li class="chapter " data-level="1.1.2.5.2" data-path="../文件系统相关扩展/文件系统.html">
<a href="../文件系统相关扩展/文件系统.html">
文件系统
</a>
</li>
</ul>
</li>
<li class="chapter " data-level="1.1.2.6" data-path="../国际化与字符编码支持.html">
<a href="../国际化与字符编码支持.html">
国际化与字符编码支持
</a>
<ul class="articles">
<li class="chapter " data-level="1.1.2.6.1" data-path="../国际化与字符编码支持/iconv.html">
<a href="../国际化与字符编码支持/iconv.html">
iconv
</a>
</li>
<li class="chapter " data-level="1.1.2.6.2" data-path="../国际化与字符编码支持/多字节字符串.html">
<a href="../国际化与字符编码支持/多字节字符串.html">
多字节字符串
</a>
</li>
</ul>
</li>
<li class="chapter " data-level="1.1.2.7" data-path="../图像生成和处理.html">
<a href="../图像生成和处理.html">
图像生成和处理
</a>
<ul class="articles">
<li class="chapter " data-level="1.1.2.7.1" data-path="../图像生成和处理/GD.html">
<a href="../图像生成和处理/GD.html">
GD
</a>
</li>
</ul>
</li>
<li class="chapter " data-level="1.1.2.8" data-path="../邮件相关扩展.html">
<a href="../邮件相关扩展.html">
邮件相关扩展
</a>
<ul class="articles">
<li class="chapter " data-level="1.1.2.8.1" data-path="../邮件相关扩展/邮件.html">
<a href="../邮件相关扩展/邮件.html">
邮件
</a>
</li>
</ul>
</li>
<li class="chapter " data-level="1.1.2.9" data-path="../数学扩展.html">
<a href="../数学扩展.html">
数学扩展
</a>
<ul class="articles">
<li class="chapter " data-level="1.1.2.9.1" data-path="../数学扩展/任意精度数学.html">
<a href="../数学扩展/任意精度数学.html">
任意精度数学
</a>
</li>
<li class="chapter " data-level="1.1.2.9.2" data-path="../数学扩展/数学.html">
<a href="../数学扩展/数学.html">
数学
</a>
</li>
</ul>
</li>
<li class="chapter " data-level="1.1.2.10" data-path="../进程控制扩展.html">
<a href="../进程控制扩展.html">
进程控制扩展
</a>
<ul class="articles">
<li class="chapter " data-level="1.1.2.10.1" data-path="../进程控制扩展/程序执行.html">
<a href="../进程控制扩展/程序执行.html">
程序执行
</a>
</li>
</ul>
</li>
<li class="chapter " data-level="1.1.2.11" data-path="../其他基本扩展.html">
<a href="../其他基本扩展.html">
其他基本扩展
</a>
<ul class="articles">
<li class="chapter " data-level="1.1.2.11.1" data-path="../其他基本扩展/JSON.html">
<a href="../其他基本扩展/JSON.html">
JSON
</a>
</li>
<li class="chapter " data-level="1.1.2.11.2" data-path="../其他基本扩展/杂项.html">
<a href="../其他基本扩展/杂项.html">
杂项
</a>
</li>
<li class="chapter " data-level="1.1.2.11.3" data-path="../其他基本扩展/PHP 标准库.html">
<a href="../其他基本扩展/PHP 标准库.html">
PHP 标准库
</a>
</li>
<li class="chapter " data-level="1.1.2.11.4" data-path="../其他基本扩展/Streams.html">
<a href="../其他基本扩展/Streams.html">
Streams
</a>
</li>
<li class="chapter " data-level="1.1.2.11.5" data-path="../其他基本扩展/Tokenizer.html">
<a href="../其他基本扩展/Tokenizer.html">
Tokenizer
</a>
</li>
<li class="chapter " data-level="1.1.2.11.6" data-path="../其他基本扩展/URL.html">
<a href="../其他基本扩展/URL.html">
URL
</a>
</li>
</ul>
</li>
<li class="chapter " data-level="1.1.2.12" data-path="../其他服务.html">
<a href="../其他服务.html">
其他服务
</a>
<ul class="articles">
<li class="chapter " data-level="1.1.2.12.1" data-path="../其他服务/cURL.html">
<a href="../其他服务/cURL.html">
cURL
</a>
</li>
<li class="chapter " data-level="1.1.2.12.2" data-path="../其他服务/网络.html">
<a href="../其他服务/网络.html">
网络
</a>
</li>
<li class="chapter " data-level="1.1.2.12.3" data-path="../其他服务/Sockets.html">
<a href="../其他服务/Sockets.html">
Sockets
</a>
</li>
</ul>
</li>
<li class="chapter " data-level="1.1.2.13" data-path="../Session 扩展.html">
<a href="../Session 扩展.html">
Session 扩展
</a>
<ul class="articles">
<li class="chapter " data-level="1.1.2.13.1" data-path="../Session 扩展/Session.html">
<a href="../Session 扩展/Session.html">
Session
</a>
</li>
</ul>
</li>
<li class="chapter " data-level="1.1.2.14" data-path="../文本处理.html">
<a href="../文本处理.html">
文本处理
</a>
<ul class="articles">
<li class="chapter " data-level="1.1.2.14.1" data-path="正则表达式.html">
<a href="正则表达式.html">
正则表达式
</a>
</li>
<li class="chapter active" data-level="1.1.2.14.2" data-path="字符串.html">
<a href="字符串.html">
字符串
</a>
</li>
</ul>
</li>
<li class="chapter " data-level="1.1.2.15" data-path="../变量与类型相关扩展.html">
<a href="../变量与类型相关扩展.html">
变量与类型相关扩展
</a>
<ul class="articles">
<li class="chapter " data-level="1.1.2.15.1" data-path="../变量与类型相关扩展/数组.html">
<a href="../变量与类型相关扩展/数组.html">
数组
</a>
</li>
<li class="chapter " data-level="1.1.2.15.2" data-path="../变量与类型相关扩展/类与对象.html">
<a href="../变量与类型相关扩展/类与对象.html">
类与对象
</a>
</li>
<li class="chapter " data-level="1.1.2.15.3" data-path="../变量与类型相关扩展/字符类型检测.html">
<a href="../变量与类型相关扩展/字符类型检测.html">
字符类型检测
</a>
</li>
<li class="chapter " data-level="1.1.2.15.4" data-path="../变量与类型相关扩展/过滤器.html">
<a href="../变量与类型相关扩展/过滤器.html">
过滤器
</a>
</li>
<li class="chapter " data-level="1.1.2.15.5" data-path="../变量与类型相关扩展/函数处理.html">
<a href="../变量与类型相关扩展/函数处理.html">
函数处理
</a>
</li>
<li class="chapter " data-level="1.1.2.15.6" data-path="../变量与类型相关扩展/反射.html">
<a href="../变量与类型相关扩展/反射.html">
反射
</a>
</li>
<li class="chapter " data-level="1.1.2.15.7" data-path="../变量与类型相关扩展/变量.html">
<a href="../变量与类型相关扩展/变量.html">
变量
</a>
</li>
</ul>
</li>
<li class="chapter " data-level="1.1.2.16" data-path="../XML 操作.html">
<a href="../XML 操作.html">
XML 操作
</a>
<ul class="articles">
<li class="chapter " data-level="1.1.2.16.1" data-path="../XML 操作/SimpleXML.html">
<a href="../XML 操作/SimpleXML.html">
SimpleXML
</a>
</li>
<li class="chapter " data-level="1.1.2.16.2" data-path="../XML 操作/XML 解析器.html">
<a href="../XML 操作/XML 解析器.html">
XML 解析器
</a>
</li>
</ul>
</li>
</ul>
</li>
<li class="chapter " data-level="1.1.3" data-path="../../会话和安全.html">
<a href="../../会话和安全.html">
会话和安全
</a>
<ul class="articles">
<li class="chapter " data-level="1.1.3.1" data-path="../../会话和安全/会话管理基础.html">
<a href="../../会话和安全/会话管理基础.html">
会话管理基础
</a>
</li>
<li class="chapter " data-level="1.1.3.2" data-path="../../会话和安全/和会话安全相关的配置项.html">
<a href="../../会话和安全/和会话安全相关的配置项.html">
和会话安全相关的配置项
</a>
</li>
</ul>
</li>
<li class="chapter " data-level="1.1.4" data-path="../../PHP 的命令行模式.html">
<a href="../../PHP 的命令行模式.html">
PHP 的命令行模式
</a>
<ul class="articles">
<li class="chapter " data-level="1.1.4.1" data-path="../../PHP 的命令行模式/内置的 Web 服务器.html">
<a href="../../PHP 的命令行模式/内置的 Web 服务器.html">
内置的 Web 服务器
</a>
</li>
<li class="chapter " data-level="1.1.4.2" data-path="../../PHP 的命令行模式/和命令行模式相关的配置项.html">
<a href="../../PHP 的命令行模式/和命令行模式相关的配置项.html">
和命令行模式相关的配置项
</a>
</li>
</ul>
</li>
<li class="chapter " data-level="1.1.5" data-path="../../垃圾回收机制.html">
<a href="../../垃圾回收机制.html">
垃圾回收机制
</a>
</li>
<li class="chapter " data-level="1.1.6" data-path="../../PHP 类型比较表.html">
<a href="../../PHP 类型比较表.html">
PHP 类型比较表
</a>
</li>
<li class="chapter " data-level="1.1.7" data-path="../../PSR.html">
<a href="../../PSR.html">
PSR
</a>
<ul class="articles">
<li class="chapter " data-level="1.1.7.1" data-path="../../PSR/PSR-1 基础编码规范.html">
<a href="../../PSR/PSR-1 基础编码规范.html">
PSR-1 基础编码规范
</a>
</li>
<li class="chapter " data-level="1.1.7.2" data-path="../../PSR/PSR-4 自动加载规范.html">
<a href="../../PSR/PSR-4 自动加载规范.html">
PSR-4 自动加载规范
</a>
</li>
<li class="chapter " data-level="1.1.7.3" data-path="../../PSR/PSR-12 编码规范扩充.html">
<a href="../../PSR/PSR-12 编码规范扩充.html">
PSR-12 编码规范扩充
</a>
</li>
</ul>
</li>
</ul>
</li>
<li class="divider"></li>
<li>
<a href="https://www.gitbook.com" target="blank" class="gitbook-link">
本书使用 GitBook 发布
</a>
</li>
</ul>
</nav>
</div>
<div class="book-body">
<div class="body-inner">
<div class="book-header" role="navigation">
<!-- Title -->
<h1>
<i class="fa fa-circle-o-notch fa-spin"></i>
<a href="../../.." >字符串</a>
</h1>
</div>
<div class="page-wrapper" tabindex="-1" role="main">
<div class="page-inner">
<div id="book-search-results">
<div class="search-noresults">
<section class="normal markdown-section">
<h1 id="字符串">字符串</h1>
<ul>
<li><a href="#addcslashes">addcslashes - 以 C 语言风格使用反斜线转义字符串</a></li>
<li><a href="#addslashes">addslashes - 使用反斜线转义字符串</a></li>
<li><a href="#bin2hex">bin2hex - 二进制字符串转换为十六进制值</a></li>
<li><a href="#chop">chop - 删除字符串末端的空白字符（或者其他字符）</a></li>
<li><a href="#chr">chr - 返回指定的字符</a></li>
<li><a href="#chunksplit">chunk_split - 将字符串分割成小块</a></li>
<li><a href="#convertuudecode">convert_uudecode - 解码一个 uuencode 编码的字符串</a></li>
<li><a href="#convertuuencode">convert_uuencode - 使用 uuencode 编码一个字符串</a></li>
<li><a href="#countchars">count_chars - 返回字符串所用字符的信息</a></li>
<li><a href="#crc32">crc32 - 计算一个字符串的 crc32 多项式</a></li>
<li><a href="#crypt">crypt - 单向字符串散列</a></li>
<li><a href="#echo">echo - 输出一个或多个字符串</a></li>
<li><a href="#explode">explode - 使用一个字符串分割另一个字符串</a></li>
<li><a href="#fprintf">fprintf - 将格式化后的字符串写入到流</a></li>
<li><a href="#gethtmltranslationtable">get_html_translation_table - 返回使用 htmlspecialchars 和 htmlentities 后的转换表</a></li>
<li><a href="#hebrev">hebrev - 将逻辑顺序希伯来文转换为视觉顺序希伯来文</a></li>
<li><a href="#hex2bin">hex2bin - 转换十六进制字符串为二进制字符串</a></li>
<li><a href="#htmlentitydecode">html_entity_decode - 将 HTML 实体转换为相应的字符</a></li>
<li><a href="#htmlentities">htmlentities - 将字符转换为相应的 HTML 实体</a></li>
<li><a href="#htmlspecialcharsdecode">htmlspecialchars_decode - 将特殊的 HTML 实体转换回相应的特殊字符</a></li>
<li><a href="#htmlspecialchars">htmlspecialchars - 将特殊字符转换为相应的 HTML 实体</a></li>
<li><a href="#implode">implode - 将一个一维数组的值转化为字符串</a></li>
<li><a href="#join">join - 将一个一维数组的值转化为字符串</a></li>
<li><a href="#lcfirst">lcfirst - 使一个字符串的第一个字符小写</a></li>
<li><a href="#levenshtein">levenshtein - 计算两个字符串之间的编辑距离</a></li>
<li><a href="#localeconv">localeconv - 获取数字格式信息</a></li>
<li><a href="#ltrim">ltrim - 删除字符串开头的空白字符（或其他字符）</a></li>
<li><a href="#md5file">md5_file - 计算指定文件的 MD5 散列值</a></li>
<li><a href="#md5">md5 - 计算字符串的 MD5 散列值</a></li>
<li><a href="#metaphone">metaphone - 计算字符串的变音键</a></li>
<li><a href="#nllanginfo">nl_langinfo - 查询语言和区域信息</a></li>
<li><a href="#nl2br">nl2br - 在字符串所有新行之前插入 HTML 换行标记</a></li>
<li><a href="#numberformat">number_format - 以千位分隔符方式格式化一个数字</a></li>
<li><a href="#ord">ord - 转换字符串第一个字节为 0 - 255 之间的值</a></li>
<li><a href="#parsestr">parse_str - 将字符串解析成多个变量</a></li>
<li><a href="#print">print - 输出字符串</a></li>
<li><a href="#printf">printf - 输出格式化字符串</a></li>
<li><a href="#quotedprintabledecode">quoted_printable_decode - 将 quoted-printable 字符串转换为 8-bit 字符串</a></li>
<li><a href="#quotedprintableencode">quoted_printable_encode - 将 8-bit 字符串转换成 quoted-printable 字符串</a></li>
<li><a href="#quotemeta">quotemeta - 转义元字符集</a></li>
<li><a href="#rtrim">rtrim - 删除字符串末端的空白字符（或者其他字符）</a></li>
<li><a href="#setlocale">setlocale - 设置地区信息</a></li>
<li><a href="#sha1file">sha1_file - 计算文件的 sha1 散列值</a></li>
<li><a href="#sha1">sha1 - 计算字符串的 sha1 散列值</a></li>
<li><a href="#similartext">similar_text - 计算两个字符串的相似度</a></li>
<li><a href="#soundex">soundex - 计算字符串的 soundex 键名</a></li>
<li><a href="#sprintf">sprintf - 返回格式化的字符串</a></li>
<li><a href="#sscanf">sscanf - 根据指定格式解析输入的字符</a></li>
<li><a href="#strgetcsv">str_getcsv - 解析 CSV 字符串为一个数组</a></li>
<li><a href="#strireplace">str_ireplace - str_replace 的忽略大小写版本</a></li>
<li><a href="#strpad">str_pad - 使用另一个字符串填充字符串为指定长度</a></li>
<li><a href="#strrepeat">str_repeat - 重复一个字符串</a></li>
<li><a href="#strreplace">str_replace - 子字符串替换</a></li>
<li><a href="#strrot13">str_rot13 - 对字符串执行 ROT13 转换</a></li>
<li><a href="#strshuffle">str_shuffle - 随机打乱一个字符串</a></li>
<li><a href="#strsplit">str_split - 将字符串转换为数组</a></li>
<li><a href="#strwordcount">str_word_count - 返回字符串中单词的使用情况</a></li>
<li><a href="#strcasecmp">strcasecmp - 二进制安全比较字符串（不区分大小写）</a></li>
<li><a href="#strchr">strchr - 查找字符串的首次出现</a></li>
<li><a href="#strcmp">strcmp - 二进制安全字符串比较</a></li>
<li><a href="#strcoll">strcoll - 基于区域设置的字符串比较</a></li>
<li><a href="#strcspn">strcspn - 获取不匹配遮罩的起始子字符串的长度</a></li>
<li><a href="#striptags">strip_tags - 从字符串中去除 HTML 和 PHP 标记</a></li>
<li><a href="#stripcslashes">stripcslashes - 反引用一个使用 addcslashes 转义的字符串</a></li>
<li><a href="#stripos">stripos - 查找字符串首次出现的位置（不区分大小写）</a></li>
<li><a href="#stripslashes">stripslashes - 反引用一个引用字符串</a></li>
<li><a href="#stristr">stristr - strstr 函数的忽略大小写版本</a></li>
<li><a href="#strlen">strlen - 获取字符串长度</a></li>
<li><a href="#strnatcasecmp">strnatcasecmp - 使用自然顺序算法比较字符串（不区分大小写）</a></li>
<li><a href="#strnatcmp">strnatcmp - 使用自然排序算法比较字符串</a></li>
<li><a href="#strncasecmp">strncasecmp - 二进制安全比较字符串开头的若干个字符（不区分大小写）</a></li>
<li><a href="#strncmp">strncmp - 二进制安全比较字符串开头的若干个字符</a></li>
<li><a href="#strpbrk">strpbrk - 在字符串中查找一组字符的任何一个字符</a></li>
<li><a href="#strpos">strpos - 查找字符串首次出现的位置</a></li>
<li><a href="#strrchr">strrchr - 查找指定字符在字符串中的最后一次出现</a></li>
<li><a href="#strrev">strrev - 反转字符串</a></li>
<li><a href="#strripos">strripos - 计算指定字符串在目标字符串中最后一次出现的位置（不区分大小写）</a></li>
<li><a href="#strrpos">strrpos - 计算指定字符串在目标字符串中最后一次出现的位置</a></li>
<li><a href="#strspn">strspn - 计算字符串中全部字符都存在于指定字符集合中的第一段子串的长度</a></li>
<li><a href="#strstr">strstr - 查找字符串的首次出现</a></li>
<li><a href="#strtok">strtok - 标记分割字符串</a></li>
<li><a href="#strtolower">strtolower - 将字符串转化为小写</a></li>
<li><a href="#strtoupper">strtoupper - 将字符串转化为大写</a></li>
<li><a href="#strtr">strtr - 转换指定字符</a></li>
<li><a href="#substrcompare">substr_compare - 二进制安全比较字符串（从偏移位置比较指定长度）</a></li>
<li><a href="#substrcount">substr_count - 计算字串出现的次数</a></li>
<li><a href="#substrreplace">substr_replace - 替换字符串的子串</a></li>
<li><a href="#substr">substr - 返回字符串的子串</a></li>
<li><a href="#trim">trim - 去除字符串首尾处的空白字符（或者其他字符）</a></li>
<li><a href="#ucfirst">ucfirst - 将字符串的首字母转换为大写</a></li>
<li><a href="#ucwords">ucwords - 将字符串中每个单词的首字母转换为大写</a></li>
<li><a href="#vfprintf">vfprintf - 将格式化字符串写入流</a></li>
<li><a href="#vprintf">vprintf - 输出格式化字符串</a></li>
<li><a href="#vsprintf">vsprintf - 返回格式化字符串</a></li>
<li><a href="#wordwrap">wordwrap - 打断字符串为指定数量的字串</a></li>
</ul>
<h2 id="addcslashes">addcslashes</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">addcslashes</span><span class="token punctuation">(</span><span class="token double-quoted-string string">"'"</span><span class="token punctuation">,</span> <span class="token double-quoted-string string">"'"</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(2) "\'"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">addcslashes</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'"'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'"'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(2) "\""</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">addcslashes</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'\\'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'\\'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(2) "\\"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">addcslashes</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'AaBbCc'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'a'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(7) "A\aBbCc"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">addcslashes</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'AaBbCc'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'A'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(7) "\AaBbCc"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">addcslashes</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'AaBbCc'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'a..z'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(9) "A\aB\bC\c"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">addcslashes</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'AaBbCc'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'A..Z'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(9) "\Aa\Bb\Cc"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">addcslashes</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'AaBbCc'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'A..z'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(12) "\A\a\B\b\C\c"</span>
</code></pre>
<h2 id="addslashes">addslashes</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">addslashes</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "foo"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">addslashes</span><span class="token punctuation">(</span><span class="token double-quoted-string string">"'"</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(2) "\'"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">addslashes</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'"'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(2) "\""</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">addslashes</span><span class="token punctuation">(</span>'\<span class="token package"><span class="token punctuation">\</span></span>'<span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(2) "\\"</span>
</code></pre>
<h2 id="bin2hex">bin2hex</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">bin2hex</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'0'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(2) "30"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">bin2hex</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'1'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(2) "31"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">bin2hex</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'a'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(2) "61"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">bin2hex</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'A'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(2) "41"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">bin2hex</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(6) "666f6f"</span>
</code></pre>
<h2 id="chop">chop</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">chop</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "foo"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">chop</span><span class="token punctuation">(</span><span class="token single-quoted-string string">' foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(4) " foo"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">chop</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo '</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "foo"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">chop</span><span class="token punctuation">(</span><span class="token double-quoted-string string">"foo \r\n\t"</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "foo"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">chop</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'o'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(1) "f"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">chop</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'AaBbCc'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'A..Z'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(6) "AaBbCc"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">chop</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'AaBbCc'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'A..z'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(0) ""</span>
</code></pre>
<h2 id="chr">chr</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">chr</span><span class="token punctuation">(</span><span class="token number">61</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(1) "="</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">chr</span><span class="token punctuation">(</span><span class="token number">061</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(1) "1"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">chr</span><span class="token punctuation">(</span><span class="token number">0x61</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(1) "a"</span>
</code></pre>
<h2 id="chunksplit">chunk_split</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">chunk_split</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'AaBbCc'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token comment">// string(8) "AaBbCc</span>
<span class="token comment">// "</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">chunk_split</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'AaBbCc'</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token comment">// string(12) "Aa</span>
<span class="token comment">// Bb</span>
<span class="token comment">// Cc</span>
<span class="token comment">// "</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">chunk_split</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'AaBbCc'</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'.'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token comment">// string(9) "Aa.Bb.Cc."</span>
</code></pre>
<h2 id="convertuudecode">convert_uudecode</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">convert_uudecode</span><span class="token punctuation">(</span><span class="token double-quoted-string string">"#9F]O\n`\n"</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "foo"</span>
</code></pre>
<h2 id="convertuuencode">convert_uuencode</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">convert_uuencode</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token comment">// string(8) "#9F]O</span>
<span class="token comment">// `</span>
<span class="token comment">// "</span>
</code></pre>
<h2 id="countchars">count_chars</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">count_chars</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">count_chars</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">count_chars</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">count_chars</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">count_chars</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">count_chars</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre>
<h2 id="crc32">crc32</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">crc32</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(2356372769)</span>
</code></pre>
<h2 id="crypt">crypt</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">crypt</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'password'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">crypt</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'password'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'$1$testsalt$'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre>
<h2 id="echo">echo</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">;</span>
<span class="token variable">$bar</span> <span class="token operator">=</span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">;</span>
<span class="token keyword">echo</span> <span class="token variable">$foo</span><span class="token punctuation">;</span> <span class="token comment">// foo</span>
<span class="token keyword">echo</span> <span class="token variable">$bar</span><span class="token punctuation">;</span> <span class="token comment">// bar</span>
<span class="token keyword">echo</span> <span class="token variable">$foo</span><span class="token punctuation">,</span> <span class="token variable">$bar</span><span class="token punctuation">;</span> <span class="token comment">// foobar</span>
</code></pre>
<h2 id="explode">explode</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">explode</span><span class="token punctuation">(</span><span class="token single-quoted-string string">' '</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'f o o'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(3) { [0]=> string(1) "f" [1]=> string(1) "o" [2]=> string(1) "o" }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">explode</span><span class="token punctuation">(</span><span class="token single-quoted-string string">' '</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'f o o'</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(2) { [0]=> string(1) "f" [1]=> string(3) "o o" }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">explode</span><span class="token punctuation">(</span><span class="token single-quoted-string string">' '</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'f o o'</span><span class="token punctuation">,</span> <span class="token operator">-</span><span class="token number">1</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(2) { [0]=> string(1) "f" [1]=> string(1) "o" }</span>
</code></pre>
<h2 id="fprintf">fprintf</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">fprintf</span><span class="token punctuation">(</span><span class="token function">fopen</span><span class="token punctuation">(</span><span class="token constant">__DIR__</span> <span class="token punctuation">.</span> <span class="token single-quoted-string string">'/example.txt'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'w'</span><span class="token punctuation">)</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'%s'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(3)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">fprintf</span><span class="token punctuation">(</span><span class="token function">fopen</span><span class="token punctuation">(</span><span class="token constant">__DIR__</span> <span class="token punctuation">.</span> <span class="token single-quoted-string string">'/example.txt'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'w'</span><span class="token punctuation">)</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'%04d-%02d-%02d'</span><span class="token punctuation">,</span> <span class="token function">date</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'Y'</span><span class="token punctuation">)</span><span class="token punctuation">,</span> <span class="token function">date</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'m'</span><span class="token punctuation">)</span><span class="token punctuation">,</span> <span class="token function">date</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'d'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(10)</span>
</code></pre>
<h2 id="gethtmltranslationtable">get_html_translation_table</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">get_html_translation_table</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">get_html_translation_table</span><span class="token punctuation">(</span><span class="token constant">HTML_ENTITIES</span><span class="token punctuation">,</span> <span class="token constant">ENT_QUOTES</span> <span class="token operator">|</span> <span class="token constant">ENT_HTML5</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre>
<h2 id="hebrev">hebrev</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">hebrev</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "foo"</span>
</code></pre>
<h2 id="hex2bin">hex2bin</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">hex2bin</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'666f6f'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "foo"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">hex2bin</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'626172'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "bar"</span>
</code></pre>
<h2 id="htmlentitydecode">html_entity_decode</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">html_entity_decode</span><span class="token punctuation">(</span><span class="token double-quoted-string string">"&lt;p id=&quot;foo&quot; class='foo'&gt;foo&lt;/p&gt;"</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(31) "<p id="foo" class='foo'>foo</p>"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">html_entity_decode</span><span class="token punctuation">(</span><span class="token double-quoted-string string">"&lt;p id=&quot;foo&quot; class='foo'&gt;foo&lt;/p&gt;"</span><span class="token punctuation">,</span> <span class="token constant">ENT_COMPAT</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(31) "<p id="foo" class='foo'>foo</p>"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">html_entity_decode</span><span class="token punctuation">(</span><span class="token double-quoted-string string">"&lt;p id=&quot;foo&quot; class=&#039;foo&#039;&gt;foo&lt;/p&gt;"</span><span class="token punctuation">,</span> <span class="token constant">ENT_QUOTES</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(31) "<p id="foo" class='foo'>foo</p>"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">html_entity_decode</span><span class="token punctuation">(</span><span class="token double-quoted-string string">"&lt;p id=\"foo\" class='foo'&gt;foo&lt;/p&gt;"</span><span class="token punctuation">,</span> <span class="token constant">ENT_NOQUOTES</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(31) "<p id="foo" class='foo'>foo</p>"</span>
</code></pre>
<h2 id="htmlentities">htmlentities</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token variable">$string</span> <span class="token operator">=</span> <span class="token operator"><</span><span class="token operator"><</span><span class="token operator"><</span><span class="token constant">EOT</span>
<span class="token operator"><</span>p id<span class="token operator">=</span><span class="token double-quoted-string string">"foo"</span> <span class="token keyword">class</span><span class="token operator">=</span><span class="token single-quoted-string string">'foo'</span><span class="token operator">></span>foo<span class="token operator"><</span><span class="token operator">/</span>p<span class="token operator">></span>
<span class="token constant">EOT</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">htmlentities</span><span class="token punctuation">(</span><span class="token variable">$string</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(53) "&lt;p id=&quot;foo&quot; class='foo'&gt;foo&lt;/p&gt;"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">htmlentities</span><span class="token punctuation">(</span><span class="token variable">$string</span><span class="token punctuation">,</span> <span class="token constant">ENT_COMPAT</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(53) "&lt;p id=&quot;foo&quot; class='foo'&gt;foo&lt;/p&gt;"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">htmlentities</span><span class="token punctuation">(</span><span class="token variable">$string</span><span class="token punctuation">,</span> <span class="token constant">ENT_QUOTES</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(63) "&lt;p id=&quot;foo&quot; class=&#039;foo&#039;&gt;foo&lt;/p&gt;"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">htmlentities</span><span class="token punctuation">(</span><span class="token variable">$string</span><span class="token punctuation">,</span> <span class="token constant">ENT_NOQUOTES</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(43) "&lt;p id="foo" class='foo'&gt;foo&lt;/p&gt;"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">htmlentities</span><span class="token punctuation">(</span><span class="token variable">$string</span><span class="token punctuation">,</span> <span class="token constant">ENT_QUOTES</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'UTF-8'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(63) "&lt;p id=&quot;foo&quot; class=&#039;foo&#039;&gt;foo&lt;/p&gt;"</span>
</code></pre>
<h2 id="htmlspecialcharsdecode">htmlspecialchars_decode</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">htmlspecialchars_decode</span><span class="token punctuation">(</span><span class="token double-quoted-string string">"&lt;p id=&quot;foo&quot; class='foo'&gt;foo&lt;/p&gt;"</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(31) "<p id="foo" class='foo'>foo</p>"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">htmlspecialchars_decode</span><span class="token punctuation">(</span><span class="token double-quoted-string string">"&lt;p id=&quot;foo&quot; class='foo'&gt;foo&lt;/p&gt;"</span><span class="token punctuation">,</span> <span class="token constant">ENT_COMPAT</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(31) "<p id="foo" class='foo'>foo</p>"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">htmlspecialchars_decode</span><span class="token punctuation">(</span><span class="token double-quoted-string string">"&lt;p id=&quot;foo&quot; class=&#039;foo&#039;&gt;foo&lt;/p&gt;"</span><span class="token punctuation">,</span> <span class="token constant">ENT_QUOTES</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(31) "<p id="foo" class='foo'>foo</p>"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">htmlspecialchars_decode</span><span class="token punctuation">(</span><span class="token double-quoted-string string">"&lt;p id=\"foo\" class='foo'&gt;foo&lt;/p&gt;"</span><span class="token punctuation">,</span> <span class="token constant">ENT_NOQUOTES</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(31) "<p id="foo" class='foo'>foo</p>"</span>
</code></pre>
<h2 id="htmlspecialchars">htmlspecialchars</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token variable">$string</span> <span class="token operator">=</span> <span class="token operator"><</span><span class="token operator"><</span><span class="token operator"><</span><span class="token constant">EOT</span>
<span class="token operator"><</span>p id<span class="token operator">=</span><span class="token double-quoted-string string">"foo"</span> <span class="token keyword">class</span><span class="token operator">=</span><span class="token single-quoted-string string">'foo'</span><span class="token operator">></span>foo<span class="token operator"><</span><span class="token operator">/</span>p<span class="token operator">></span>
<span class="token constant">EOT</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">htmlspecialchars</span><span class="token punctuation">(</span><span class="token variable">$string</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(53) "&lt;p id=&quot;foo&quot; class='foo'&gt;foo&lt;/p&gt;"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">htmlspecialchars</span><span class="token punctuation">(</span><span class="token variable">$string</span><span class="token punctuation">,</span> <span class="token constant">ENT_COMPAT</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(53) "&lt;p id=&quot;foo&quot; class='foo'&gt;foo&lt;/p&gt;"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">htmlspecialchars</span><span class="token punctuation">(</span><span class="token variable">$string</span><span class="token punctuation">,</span> <span class="token constant">ENT_QUOTES</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(63) "&lt;p id=&quot;foo&quot; class=&#039;foo&#039;&gt;foo&lt;/p&gt;"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">htmlspecialchars</span><span class="token punctuation">(</span><span class="token variable">$string</span><span class="token punctuation">,</span> <span class="token constant">ENT_NOQUOTES</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(43) "&lt;p id="foo" class='foo'&gt;foo&lt;/p&gt;"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">htmlspecialchars</span><span class="token punctuation">(</span><span class="token variable">$string</span><span class="token punctuation">,</span> <span class="token constant">ENT_QUOTES</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'UTF-8'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(63) "&lt;p id=&quot;foo&quot; class=&#039;foo&#039;&gt;foo&lt;/p&gt;"</span>
</code></pre>
<h2 id="implode">implode</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">implode</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(9) "foobarbaz"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">implode</span><span class="token punctuation">(</span><span class="token single-quoted-string string">''</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(9) "foobarbaz"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">implode</span><span class="token punctuation">(</span><span class="token single-quoted-string string">', '</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(13) "foo, bar, baz"</span>
</code></pre>
<h2 id="join">join</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">join</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(9) "foobarbaz"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">join</span><span class="token punctuation">(</span><span class="token single-quoted-string string">''</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(9) "foobarbaz"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">join</span><span class="token punctuation">(</span><span class="token single-quoted-string string">', '</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(13) "foo, bar, baz"</span>
</code></pre>
<h2 id="lcfirst">lcfirst</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">lcfirst</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "foo"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">lcfirst</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'FOO'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "fOO"</span>
</code></pre>
<h2 id="levenshtein">levenshtein</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">levenshtein</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(0)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">levenshtein</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'f'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(2)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">levenshtein</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'fu'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(2)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">levenshtein</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(3)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">levenshtein</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'oof'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(2)</span>
</code></pre>
<h2 id="localeconv">localeconv</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">localeconv</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre>
<h2 id="ltrim">ltrim</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">ltrim</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "foo"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">ltrim</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo '</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(4) "foo "</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">ltrim</span><span class="token punctuation">(</span><span class="token single-quoted-string string">' foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "foo"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">ltrim</span><span class="token punctuation">(</span><span class="token double-quoted-string string">" \r\n\tfoo"</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "foo"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">ltrim</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'f'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(2) "oo"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">ltrim</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'AaBbCc'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'A..Z'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(5) "aBbCc"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">ltrim</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'AaBbCc'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'A..z'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(0) ""</span>
</code></pre>
<h2 id="md5file">md5_file</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">md5_file</span><span class="token punctuation">(</span><span class="token constant">__DIR__</span> <span class="token punctuation">.</span> <span class="token single-quoted-string string">'/example.txt'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">md5_file</span><span class="token punctuation">(</span><span class="token constant">__DIR__</span> <span class="token punctuation">.</span> <span class="token single-quoted-string string">'/example.txt'</span><span class="token punctuation">,</span> <span class="token boolean constant">true</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre>
<h2 id="md5">md5</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">md5</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">md5</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'bar'</span><span class="token punctuation">,</span> <span class="token boolean constant">true</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre>
<h2 id="metaphone">metaphone</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">metaphone</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'programming'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(7) "PRKRMNK"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">metaphone</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'programmer'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(6) "PRKRMR"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">metaphone</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'programming'</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(5) "PRKRM"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">metaphone</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'programmer'</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(5) "PRKRM"</span>
</code></pre>
<h2 id="nllanginfo">nl_langinfo</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">nl_langinfo</span><span class="token punctuation">(</span><span class="token constant">DAY_1</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre>
<h2 id="nl2br">nl2br</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">nl2br</span><span class="token punctuation">(</span><span class="token double-quoted-string string">"foo\nbar"</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token comment">// string(13) "foo<br /></span>
<span class="token comment">// bar"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">nl2br</span><span class="token punctuation">(</span><span class="token double-quoted-string string">"foo\nbar"</span><span class="token punctuation">,</span> <span class="token boolean constant">false</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token comment">// string(11) "foo<br></span>
<span class="token comment">// bar"</span>
</code></pre>
<h2 id="numberformat">number_format</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">number_format</span><span class="token punctuation">(</span><span class="token number">1234.5678</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(5) "1,235"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">number_format</span><span class="token punctuation">(</span><span class="token number">1234.5678</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(5) "1,235"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">number_format</span><span class="token punctuation">(</span><span class="token number">1234.5678</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(8) "1,234.57"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">number_format</span><span class="token punctuation">(</span><span class="token number">1234.5678</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">','</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">' '</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(8) "1 234,57"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">number_format</span><span class="token punctuation">(</span><span class="token number">1234.5678</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'.'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">''</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(7) "1234.57"</span>
</code></pre>
<h2 id="ord">ord</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">ord</span><span class="token punctuation">(</span><span class="token double-quoted-string string">"\r"</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(13)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">ord</span><span class="token punctuation">(</span><span class="token double-quoted-string string">"\n"</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(10)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">ord</span><span class="token punctuation">(</span><span class="token double-quoted-string string">"\t"</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(9)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">ord</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'f'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(102)</span>
</code></pre>
<h2 id="parsestr">parse_str</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">parse_str</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo=foo&bar=bar&baz[]=baz'</span><span class="token punctuation">,</span> <span class="token variable">$output</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$output</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(3) { ["foo"]=> string(3) "foo" ["bar"]=> string(3) "bar" ["baz"]=> array(1) { [0]=> string(3) "baz" } }</span>
<span class="token function">parse_str</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'f oo=foo'</span><span class="token punctuation">,</span> <span class="token variable">$output</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token variable">$output</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(1) { ["f_oo"]=> string(3) "foo" }</span>
</code></pre>
<h2 id="print">print</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token keyword">print</span> <span class="token single-quoted-string string">'Hello World!'</span><span class="token punctuation">;</span> <span class="token comment">// Hello World!</span>
<span class="token variable">$foo</span> <span class="token operator">=</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">;</span>
<span class="token keyword">print</span> <span class="token variable">$foo</span><span class="token punctuation">;</span> <span class="token comment">// foo</span>
<span class="token variable">$bar</span> <span class="token operator">=</span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">;</span>
<span class="token keyword">print</span> <span class="token double-quoted-string string">"\$bar is <span class="token interpolation"><span class="token variable">$bar</span></span>"</span><span class="token punctuation">;</span> <span class="token comment">// $bar is bar</span>
<span class="token variable">$baz</span> <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'baz'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token keyword">print</span> <span class="token double-quoted-string string">"this is <span class="token interpolation"><span class="token punctuation">{</span><span class="token variable">$baz</span><span class="token punctuation">[</span><span class="token number">0</span><span class="token punctuation">]</span><span class="token punctuation">}</span></span>"</span><span class="token punctuation">;</span> <span class="token comment">// this is baz</span>
<span class="token keyword">print</span> <span class="token operator"><</span><span class="token operator"><</span><span class="token operator"><</span><span class="token constant">EOT</span>
qux
<span class="token constant">EOT</span><span class="token punctuation">;</span> <span class="token comment">// qux</span>
</code></pre>
<h2 id="printf">printf</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">printf</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'%d'</span><span class="token punctuation">,</span> <span class="token number">233</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// 233</span>
<span class="token function">printf</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'%.1f'</span><span class="token punctuation">,</span> <span class="token number">22.12</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// 22.1</span>
<span class="token function">printf</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'%s'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// foo</span>
<span class="token function">printf</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'%s %s'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// foo bar</span>
</code></pre>
<h2 id="quotedprintabledecode">quoted_printable_decode</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">quoted_printable_decode</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "foo"</span>
</code></pre>
<h2 id="quotedprintableencode">quoted_printable_encode</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">quoted_printable_encode</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "foo"</span>
</code></pre>
<h2 id="quotemeta">quotemeta</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">quotemeta</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'.'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(2) "\."</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">quotemeta</span><span class="token punctuation">(</span><span class="token double-quoted-string string">"'"</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(1) "'</span><span class="token double-quoted-string string">"
var_dump(quotemeta('"</span><span class="token single-quoted-string string">')); // string(1) """
var_dump(quotemeta('</span>\<span class="token package"><span class="token punctuation">\</span></span>'<span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(2) "\\"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">quotemeta</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'+'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(2) "\+"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">quotemeta</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'*'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(2) "\*"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">quotemeta</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'?'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(2) "\?"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">quotemeta</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'['</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(2) "\["</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">quotemeta</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'^'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(2) "\^"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">quotemeta</span><span class="token punctuation">(</span><span class="token single-quoted-string string">']'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(2) "\]"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">quotemeta</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'('</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(2) "\("</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">quotemeta</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'$'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(2) "\$"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">quotemeta</span><span class="token punctuation">(</span><span class="token single-quoted-string string">')'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(2) "\)"</span>
</code></pre>
<h2 id="rtrim">rtrim</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">rtrim</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "foo"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">rtrim</span><span class="token punctuation">(</span><span class="token single-quoted-string string">' foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(4) " foo"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">rtrim</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo '</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "foo"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">rtrim</span><span class="token punctuation">(</span><span class="token double-quoted-string string">"foo \r\n\t"</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "foo"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">rtrim</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'o'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(1) "f"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">rtrim</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'AaBbCc'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'A..Z'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(6) "AaBbCc"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">rtrim</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'AaBbCc'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'A..z'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(0) ""</span>
</code></pre>
<h2 id="setlocale">setlocale</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">setlocale</span><span class="token punctuation">(</span><span class="token constant">LC_ALL</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'nld_nld'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre>
<h2 id="sha1file">sha1_file</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">sha1_file</span><span class="token punctuation">(</span><span class="token constant">__DIR__</span> <span class="token punctuation">.</span> <span class="token single-quoted-string string">'/example.txt'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">sha1_file</span><span class="token punctuation">(</span><span class="token constant">__DIR__</span> <span class="token punctuation">.</span> <span class="token single-quoted-string string">'/example.txt'</span><span class="token punctuation">,</span> <span class="token boolean constant">true</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre>
<h2 id="sha1">sha1</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">sha1</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">sha1</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token boolean constant">true</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre>
<h2 id="similartext">similar_text</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">similar_text</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(0)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">similar_text</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'fu'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(1)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">similar_text</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'full'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(1)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">similar_text</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'full'</span><span class="token punctuation">,</span> <span class="token variable">$percent</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(1)</span>
</code></pre>
<h2 id="soundex">soundex</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">soundex</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(4) "F000"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">soundex</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'fu'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(4) "F000"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">soundex</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'full'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(4) "F400"</span>
</code></pre>
<h2 id="sprintf">sprintf</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">sprintf</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'%d'</span><span class="token punctuation">,</span> <span class="token number">233</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "233"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">sprintf</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'%.1f'</span><span class="token punctuation">,</span> <span class="token number">22.12</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(4) "22.1"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">sprintf</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'%s'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "foo"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">sprintf</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'%s %s'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(7) "foo bar"</span>
</code></pre>
<h2 id="sscanf">sscanf</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">sscanf</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'233'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'%d'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(1) { [0]=> int(233) }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">sscanf</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo=foo bar=bar'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo=%s bar=%s'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(2) { [0]=> string(3) "foo" [1]=> string(3) "bar" }</span>
</code></pre>
<h2 id="strgetcsv">str_getcsv</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">str_getcsv</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo,bar'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(2) { [0]=> string(3) "foo" [1]=> string(3) "bar" }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">str_getcsv</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo;bar'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">';'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(2) { [0]=> string(3) "foo" [1]=> string(3) "bar" }</span>
</code></pre>
<h2 id="strireplace">str_ireplace</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">str_ireplace</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'FOO'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">''</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo bar'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(4) " bar"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">str_ireplace</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">''</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo bar'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(4) " bar"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">str_ireplace</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo bar'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(7) "bar bar"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">str_ireplace</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">''</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo bar'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(1) " "</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">str_ireplace</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo bar'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(7) "baz baz"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">str_ireplace</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'baz'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'qux'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo bar'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(7) "baz qux"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">str_ireplace</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'baz'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'qux'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo bar'</span><span class="token punctuation">,</span> <span class="token variable">$count</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(7) "baz qux"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">str_ireplace</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'f'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'o'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'fo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'0'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(4) "f000"</span>
</code></pre>
<h2 id="strpad">str_pad</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">str_pad</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "foo"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">str_pad</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token number">10</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(10) "foo "</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">str_pad</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token number">10</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'='</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(10) "foo======="</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">str_pad</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token number">10</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'='</span><span class="token punctuation">,</span> <span class="token constant">STR_PAD_RIGHT</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(10) "foo======="</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">str_pad</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token number">10</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'='</span><span class="token punctuation">,</span> <span class="token constant">STR_PAD_LEFT</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(10) "=======foo"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">str_pad</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token number">10</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'='</span><span class="token punctuation">,</span> <span class="token constant">STR_PAD_BOTH</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(10) "===foo===="</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">str_pad</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token number">10</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'-='</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(10) "foo-=-=-=-"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">str_pad</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token number">10</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'-='</span><span class="token punctuation">,</span> <span class="token constant">STR_PAD_BOTH</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(10) "-=-foo-=-="</span>
</code></pre>
<h2 id="strrepeat">str_repeat</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">str_repeat</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(0) ""</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">str_repeat</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(15) "foofoofoofoofoo"</span>
</code></pre>
<h2 id="strreplace">str_replace</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">str_replace</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'FOO'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">''</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo bar'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(7) "foo bar"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">str_replace</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">''</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo bar'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(4) " bar"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">str_replace</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo bar'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(7) "bar bar"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">str_replace</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">''</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo bar'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(1) " "</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">str_replace</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo bar'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(7) "baz baz"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">str_replace</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'baz'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'qux'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo bar'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(7) "baz qux"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">str_replace</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'baz'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'qux'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo bar'</span><span class="token punctuation">,</span> <span class="token variable">$count</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(7) "baz qux"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">str_replace</span><span class="token punctuation">(</span><span class="token punctuation">[</span><span class="token single-quoted-string string">'f'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'o'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'fo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'0'</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(4) "f000"</span>
</code></pre>
<h2 id="strrot13">str_rot13</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">str_rot13</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'PHP'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "CUC"</span>
</code></pre>
<h2 id="strshuffle">str_shuffle</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">str_shuffle</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre>
<h2 id="strsplit">str_split</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">str_split</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(3) { [0]=> string(1) "f" [1]=> string(1) "o" [2]=> string(1) "o" }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">str_split</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(2) { [0]=> string(2) "fo" [1]=> string(1) "o" }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">str_split</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(1) { [0]=> string(3) "foo" }</span>
</code></pre>
<h2 id="strwordcount">str_word_count</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">str_word_count</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo fo0'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(2)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">str_word_count</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo fo0'</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(2) { [0]=> string(3) "foo" [1]=> string(2) "fo" }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">str_word_count</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo fo0'</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(2) { [0]=> string(3) "foo" [4]=> string(2) "fo" }</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">str_word_count</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo fo0'</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'0'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// array(2) { [0]=> string(3) "foo" [4]=> string(3) "fo0" }</span>
</code></pre>
<h2 id="strcasecmp">strcasecmp</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strcasecmp</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'FOO'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(0)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strcasecmp</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(0)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strcasecmp</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(4)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strcasecmp</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'bar'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(-4)</span>
</code></pre>
<h2 id="strchr">strchr</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strchr</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo bar baz qux'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'ba'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(11) "bar baz qux"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strchr</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo bar baz qux'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(11) "bar baz qux"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strchr</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo bar baz qux'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(7) "baz qux"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strchr</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo bar baz qux'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span><span class="token punctuation">,</span> <span class="token boolean constant">true</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(8) "foo bar "</span>
</code></pre>
<h2 id="strcmp">strcmp</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strcmp</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'FOO'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(-1)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strcmp</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(0)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strcmp</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(1)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strcmp</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'bar'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(-1)</span>
</code></pre>
<h2 id="strcoll">strcoll</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strcoll</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'FOO'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(-1)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strcoll</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(0)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strcoll</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(1)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strcoll</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'bar'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(-1)</span>
</code></pre>
<h2 id="strcspn">strcspn</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strcspn</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo bar baz qux'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'abcde'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(4)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strcspn</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo bar baz qux'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'abcde'</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(0)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strcspn</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo bar baz qux'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'abcde'</span><span class="token punctuation">,</span> <span class="token operator">-</span><span class="token number">5</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(5)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strcspn</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo bar baz qux'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'abcde'</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(2)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strcspn</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo bar baz qux'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'abcde'</span><span class="token punctuation">,</span> <span class="token operator">-</span><span class="token number">5</span><span class="token punctuation">,</span> <span class="token operator">-</span><span class="token number">1</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(4)</span>
</code></pre>
<h2 id="striptags">strip_tags</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strip_tags</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "foo"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strip_tags</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'<p>foo</p><a>bar</a>'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(6) "foobar"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strip_tags</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'<p>foo</p><a>bar</a>'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'<p>'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(13) "<p>foo</p>bar"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strip_tags</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'<p>foo</p><a>bar</a>'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'<a>'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(13) "foo<a>bar</a>"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strip_tags</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'<p>foo</p><a>bar</a>'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'<p><a>'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(20) "<p>foo</p><a>bar</a>"</span>
</code></pre>
<h2 id="stripcslashes">stripcslashes</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">stripcslashes</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'\''</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(1) "'"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">stripcslashes</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'\"'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(1) """</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">stripcslashes</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'\\'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(1) "\"</span>
</code></pre>
<h2 id="stripos">stripos</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">stripos</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'a'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(false)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">stripos</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'o'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(1)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">stripos</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'O'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(1)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">stripos</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'o'</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(1)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">stripos</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'o'</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(2)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">stripos</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'o'</span><span class="token punctuation">,</span> <span class="token operator">-</span><span class="token number">1</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(2)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">stripos</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'oo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(1)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">stripos</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'oa'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(false)</span>
</code></pre>
<h2 id="stripslashes">stripslashes</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">stripslashes</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "foo"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">stripslashes</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'\''</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(1) "'"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">stripslashes</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'\"'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(1) """</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">stripslashes</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'\\'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(0) ""</span>
</code></pre>
<h2 id="stristr">stristr</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">stristr</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo Bar baz qux'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'b'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(11) "Bar baz qux"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">stristr</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo Bar baz qux'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(11) "Bar baz qux"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">stristr</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo Bar baz qux'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(7) "baz qux"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">stristr</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo Bar baz qux'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span><span class="token punctuation">,</span> <span class="token boolean constant">true</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(8) "foo Bar "</span>
</code></pre>
<h2 id="strlen">strlen</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strlen</span><span class="token punctuation">(</span><span class="token single-quoted-string string">''</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(0)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strlen</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(3)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strlen</span><span class="token punctuation">(</span><span class="token single-quoted-string string">' f o o '</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(7)</span>
</code></pre>
<h2 id="strnatcasecmp">strnatcasecmp</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strnatcasecmp</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo12'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo1'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(1)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strnatcasecmp</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo12'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo10'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(1)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strnatcasecmp</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo12'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo2'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(1)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strnatcasecmp</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'Foo12'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo2'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(1)</span>
</code></pre>
<h2 id="strnatcmp">strnatcmp</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strnatcmp</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo12'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo1'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(1)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strnatcmp</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo12'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo10'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(1)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strnatcmp</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo12'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo2'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(1)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strnatcmp</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'Foo12'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'foo2'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(-1)</span>
</code></pre>
<h2 id="strncasecmp">strncasecmp</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strncasecmp</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'bar'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'BAZ'</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(0)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strncasecmp</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'bar'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'BAZ'</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(0)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strncasecmp</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'bar'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'BAZ'</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(-8)</span>
</code></pre>
<h2 id="strncmp">strncmp</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strncmp</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'bar'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(0)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strncmp</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'bar'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(0)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strncmp</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'bar'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(-1)</span>
</code></pre>
<h2 id="strpbrk">strpbrk</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strpbrk</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo bar baz qux'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'abcde'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(11) "bar baz qux"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strpbrk</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo bar baz qux'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'aBcde'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(10) "ar baz qux"</span>
</code></pre>
<h2 id="strpos">strpos</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strpos</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'a'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(false)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strpos</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'o'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(1)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strpos</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'O'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(false)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strpos</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'o'</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(1)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strpos</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'o'</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(2)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strpos</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'o'</span><span class="token punctuation">,</span> <span class="token operator">-</span><span class="token number">1</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(2)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strpos</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'oo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(1)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strpos</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'oa'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(false)</span>
</code></pre>
<h2 id="strrchr">strrchr</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strrchr</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo bar baz qux'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'a'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(6) "az qux"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strrchr</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo bar baz qux'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'aa'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(6) "az qux"</span>
</code></pre>
<h2 id="strrev">strrev</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strrev</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "oof"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strrev</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'bar'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "rab"</span>
</code></pre>
<h2 id="strripos">strripos</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strripos</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'a'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(false)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strripos</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'O'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(2)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strripos</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'o'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(2)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strripos</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'f'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(0)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strripos</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'oo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(1)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strripos</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'o'</span><span class="token punctuation">,</span> <span class="token operator">-</span><span class="token number">1</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(2)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strripos</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'o'</span><span class="token punctuation">,</span> <span class="token operator">-</span><span class="token number">2</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(1)</span>
</code></pre>
<h2 id="strrpos">strrpos</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strrpos</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'a'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(false)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strrpos</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'O'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(false)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strrpos</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'o'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(2)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strrpos</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'f'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(0)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strrpos</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'oo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(1)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strrpos</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'o'</span><span class="token punctuation">,</span> <span class="token operator">-</span><span class="token number">1</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(2)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strrpos</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'o'</span><span class="token punctuation">,</span> <span class="token operator">-</span><span class="token number">2</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(1)</span>
</code></pre>
<h2 id="strspn">strspn</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strspn</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo bar baz qux'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'abfo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(3)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strspn</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo bar baz qux'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'abfo '</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(6)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strspn</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo bar baz qux'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'abfo '</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(4)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strspn</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo bar baz qux'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'abfo '</span><span class="token punctuation">,</span> <span class="token operator">-</span><span class="token number">12</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(3)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strspn</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo bar baz qux'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'abfo '</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(4)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strspn</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo bar baz qux'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'abfo '</span><span class="token punctuation">,</span> <span class="token operator">-</span><span class="token number">12</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(3)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strspn</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo bar baz qux'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'abfo '</span><span class="token punctuation">,</span> <span class="token operator">-</span><span class="token number">12</span><span class="token punctuation">,</span> <span class="token operator">-</span><span class="token number">10</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(2)</span>
</code></pre>
<h2 id="strstr">strstr</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strstr</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo Bar baz qux'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'b'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(7) "baz qux"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strstr</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo Bar baz qux'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(false)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strstr</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo Bar baz qux'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(7) "baz qux"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strstr</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo Bar baz qux'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'baz'</span><span class="token punctuation">,</span> <span class="token boolean constant">true</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(8) "foo Bar "</span>
</code></pre>
<h2 id="strtok">strtok</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strtok</span><span class="token punctuation">(</span><span class="token double-quoted-string string">"\r\n\t"</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(false)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strtok</span><span class="token punctuation">(</span><span class="token double-quoted-string string">"foo\rbar\nbaz\tqux"</span><span class="token punctuation">,</span> <span class="token double-quoted-string string">"\r\n\t"</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "foo"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strtok</span><span class="token punctuation">(</span><span class="token double-quoted-string string">"\r\n\t"</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "bar"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strtok</span><span class="token punctuation">(</span><span class="token double-quoted-string string">"\r\n\t"</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "baz"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strtok</span><span class="token punctuation">(</span><span class="token double-quoted-string string">"\r\n\t"</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "qux"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strtok</span><span class="token punctuation">(</span><span class="token double-quoted-string string">"\r\n\t"</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// bool(false)</span>
</code></pre>
<h2 id="strtolower">strtolower</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strtolower</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "foo"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strtolower</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'FOO'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "foo"</span>
</code></pre>
<h2 id="strtoupper">strtoupper</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strtoupper</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "FOO"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strtoupper</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'FOO'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "FOO"</span>
</code></pre>
<h2 id="strtr">strtr</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strtr</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'f'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'F'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "Foo"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strtr</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'o'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'O'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "fOO"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strtr</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'fo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'10'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "100"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">strtr</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'fo'</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token single-quoted-string string">'10'</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "10o"</span>
</code></pre>
<h2 id="substrcompare">substr_compare</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">substr_compare</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'abcde'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bc'</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(0)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">substr_compare</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'abcde'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'de'</span><span class="token punctuation">,</span> <span class="token operator">-</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(0)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">substr_compare</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'abcde'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bc'</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(0)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">substr_compare</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'abcde'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'BC'</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token boolean constant">true</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(0)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">substr_compare</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'abcde'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bc'</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(1)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">substr_compare</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'abcde'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'cd'</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(-1)</span>
</code></pre>
<h2 id="substrcount">substr_count</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">substr_count</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo bar baz qux'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'ba'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(2)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">substr_count</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo bar baz qux'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'ba'</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(1)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">substr_count</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo bar baz qux'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'ba'</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(0)</span>
</code></pre>
<h2 id="substrreplace">substr_replace</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">substr_replace</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo bar baz'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'qux'</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "qux"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">substr_replace</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo bar baz'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'qux'</span><span class="token punctuation">,</span> <span class="token number">8</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(11) "foo bar qux"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">substr_replace</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo bar baz'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'qux'</span><span class="token punctuation">,</span> <span class="token operator">-</span><span class="token number">3</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(11) "foo bar qux"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">substr_replace</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo bar baz'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'qux'</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(14) "quxfoo bar baz"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">substr_replace</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo bar baz'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'qux'</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(13) "quxoo bar baz"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">substr_replace</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo bar baz'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'qux'</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(11) "qux bar baz"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">substr_replace</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo bar baz'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'qux'</span><span class="token punctuation">,</span> <span class="token operator">-</span><span class="token number">3</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(14) "foo bar quxbaz"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">substr_replace</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo bar baz'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'qux'</span><span class="token punctuation">,</span> <span class="token operator">-</span><span class="token number">3</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(11) "foo bar qux"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">substr_replace</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo bar baz'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'qux'</span><span class="token punctuation">,</span> <span class="token operator">-</span><span class="token number">3</span><span class="token punctuation">,</span> <span class="token operator">-</span><span class="token number">1</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(12) "foo bar quxz"</span>
</code></pre>
<h2 id="substr">substr</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">substr</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "foo"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">substr</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(2) "oo"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">substr</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(1) "o"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">substr</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">,</span> <span class="token operator">-</span><span class="token number">2</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(1) "f"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">substr</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token operator">-</span><span class="token number">2</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(2) "oo"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">substr</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token operator">-</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(1) "o"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">substr</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token operator">-</span><span class="token number">3</span><span class="token punctuation">,</span> <span class="token operator">-</span><span class="token number">2</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(1) "f"</span>
</code></pre>
<h2 id="trim">trim</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">trim</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "foo"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">trim</span><span class="token punctuation">(</span><span class="token single-quoted-string string">' foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "foo"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">trim</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo '</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "foo"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">trim</span><span class="token punctuation">(</span><span class="token double-quoted-string string">" \r\n\tfoo \r\n\t"</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "foo"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">trim</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'o'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(1) "f"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">trim</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'AaBbCc'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'A..Z'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(5) "aBbCc"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">trim</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'AaBbCc'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'A..z'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(0) ""</span>
</code></pre>
<h2 id="ucfirst">ucfirst</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">ucfirst</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "Foo"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">ucfirst</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo bar'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(7) "Foo bar"</span>
</code></pre>
<h2 id="ucwords">ucwords</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">ucwords</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "Foo"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">ucwords</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo bar'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(7) "Foo Bar"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">ucwords</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo|bar'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(7) "Foo|bar"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">ucwords</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'foo|bar'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'|'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(7) "Foo|Bar"</span>
</code></pre>
<h2 id="vfprintf">vfprintf</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">vfprintf</span><span class="token punctuation">(</span><span class="token function">fopen</span><span class="token punctuation">(</span><span class="token constant">__DIR__</span> <span class="token punctuation">.</span> <span class="token single-quoted-string string">'/example.txt'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'w'</span><span class="token punctuation">)</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'%s'</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(3)</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">vfprintf</span><span class="token punctuation">(</span><span class="token function">fopen</span><span class="token punctuation">(</span><span class="token constant">__DIR__</span> <span class="token punctuation">.</span> <span class="token single-quoted-string string">'/example.txt'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'w'</span><span class="token punctuation">)</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'%04d-%02d-%02d'</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token function">date</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'Y'</span><span class="token punctuation">)</span><span class="token punctuation">,</span> <span class="token function">date</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'m'</span><span class="token punctuation">)</span><span class="token punctuation">,</span> <span class="token function">date</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'d'</span><span class="token punctuation">)</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// int(10)</span>
</code></pre>
<h2 id="vprintf">vprintf</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">vprintf</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'%d'</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">233</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// 233</span>
<span class="token function">vprintf</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'%.1f'</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">22.12</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// 22.1</span>
<span class="token function">vprintf</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'%s'</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// foo</span>
<span class="token function">vprintf</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'%s %s'</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// foo bar</span>
</code></pre>
<h2 id="vsprintf">vsprintf</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">vsprintf</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'%d'</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">233</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "233"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">vsprintf</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'%.1f'</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token number">22.12</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(4) "22.1"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">vsprintf</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'%s'</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(3) "foo"</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">vsprintf</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'%s %s'</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token single-quoted-string string">'foo'</span><span class="token punctuation">,</span> <span class="token single-quoted-string string">'bar'</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// string(7) "foo bar"</span>
</code></pre>
<h2 id="wordwrap">wordwrap</h2>
<pre class="language-"><code class="lang-php"><span class="token delimiter important"><?php</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">wordwrap</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'A very long woooooooooooord.'</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token comment">// string(28) "A very long woooooooooooord."</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">wordwrap</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'A very long woooooooooooord.'</span><span class="token punctuation">,</span> <span class="token number">8</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token comment">// string(28) "A very</span>
<span class="token comment">// long</span>
<span class="token comment">// woooooooooooord."</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">wordwrap</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'A very long woooooooooooord.'</span><span class="token punctuation">,</span> <span class="token number">8</span><span class="token punctuation">,</span> <span class="token double-quoted-string string">"|\n"</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token comment">// string(30) "A very|</span>
<span class="token comment">// long|</span>
<span class="token comment">// woooooooooooord."</span>
<span class="token function">var_dump</span><span class="token punctuation">(</span><span class="token function">wordwrap</span><span class="token punctuation">(</span><span class="token single-quoted-string string">'A very long woooooooooooord.'</span><span class="token punctuation">,</span> <span class="token number">8</span><span class="token punctuation">,</span> <span class="token double-quoted-string string">"\n"</span><span class="token punctuation">,</span> <span class="token boolean constant">true</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token comment">// string(29) "A very</span>
<span class="token comment">// long</span>
<span class="token comment">// wooooooo</span>
<span class="token comment">// ooooord."</span>
</code></pre>
</section>
</div>
<div class="search-results">
<div class="has-results">
<h1 class="search-results-title"><span class='search-results-count'></span> results matching "<span class='search-query'></span>"</h1>
<ul class="search-results-list"></ul>
</div>
<div class="no-results">
<h1 class="search-results-title">No results matching "<span class='search-query'></span>"</h1>
</div>
</div>
</div>
</div>
</div>
</div>
<a href="正则表达式.html" class="navigation navigation-prev " aria-label="Previous page: 正则表达式">
<i class="fa fa-angle-left"></i>
</a>
<a href="../变量与类型相关扩展.html" class="navigation navigation-next " aria-label="Next page: 变量与类型相关扩展">
<i class="fa fa-angle-right"></i>
</a>
</div>
<script>
var gitbook = gitbook || [];
gitbook.push(function() {
gitbook.page.hasChanged({"page":{"title":"字符串","level":"1.1.2.14.2","depth":4,"next":{"title":"变量与类型相关扩展","level":"1.1.2.15","depth":3,"path":"docs/函数参考/变量与类型相关扩展.md","ref":"docs/函数参考/变量与类型相关扩展.md","articles":[{"title":"数组","level":"1.1.2.15.1","depth":4,"path":"docs/函数参考/变量与类型相关扩展/数组.md","ref":"docs/函数参考/变量与类型相关扩展/数组.md","articles":[]},{"title":"类与对象","level":"1.1.2.15.2","depth":4,"path":"docs/函数参考/变量与类型相关扩展/类与对象.md","ref":"docs/函数参考/变量与类型相关扩展/类与对象.md","articles":[]},{"title":"字符类型检测","level":"1.1.2.15.3","depth":4,"path":"docs/函数参考/变量与类型相关扩展/字符类型检测.md","ref":"docs/函数参考/变量与类型相关扩展/字符类型检测.md","articles":[]},{"title":"过滤器","level":"1.1.2.15.4","depth":4,"path":"docs/函数参考/变量与类型相关扩展/过滤器.md","ref":"docs/函数参考/变量与类型相关扩展/过滤器.md","articles":[]},{"title":"函数处理","level":"1.1.2.15.5","depth":4,"path":"docs/函数参考/变量与类型相关扩展/函数处理.md","ref":"docs/函数参考/变量与类型相关扩展/函数处理.md","articles":[]},{"title":"反射","level":"1.1.2.15.6","depth":4,"path":"docs/函数参考/变量与类型相关扩展/反射.md","ref":"docs/函数参考/变量与类型相关扩展/反射.md","articles":[]},{"title":"变量","level":"1.1.2.15.7","depth":4,"path":"docs/函数参考/变量与类型相关扩展/变量.md","ref":"docs/函数参考/变量与类型相关扩展/变量.md","articles":[]}]},"previous":{"title":"正则表达式","level":"1.1.2.14.1","depth":4,"path":"docs/函数参考/文本处理/正则表达式.md","ref":"docs/函数参考/文本处理/正则表达式.md","articles":[]},"dir":"ltr"},"config":{"plugins":["back-to-top-button","chapter-fold","favicon","hide-element","lightbox","-highlight","prism","-lunr","-search","search-pro","splitter","livereload"],"root":"","styles":{"website":"styles/website.css","pdf":"styles/pdf.css","epub":"styles/epub.css","mobi":"styles/mobi.css","ebook":"styles/ebook.css","print":"styles/print.css"},"pluginsConfig":{"chapter-fold":{},"prism":{"css":["prismjs/themes/prism-okaidia.css"]},"livereload":{},"splitter":{},"search-pro":{},"hide-element":{"elements":[".gitbook-link"]},"fontsettings":{"theme":"white","family":"sans","size":2},"favicon":{"shortcut":"favicon.ico","bookmark":"favicon.ico","appleTouch":"favicon.png","appleTouchMore":{"120x120":"favicon-120x120.png","180x180":"favicon-180x180.png"}},"lightbox":{"jquery":true,"sameUuid":false},"back-to-top-button":{},"sharing":{"facebook":true,"twitter":true,"google":false,"weibo":false,"instapaper":false,"vk":false,"all":["facebook","google","twitter","weibo","instapaper"]},"theme-default":{"styles":{"website":"styles/website.css","pdf":"styles/pdf.css","epub":"styles/epub.css","mobi":"styles/mobi.css","ebook":"styles/ebook.css","print":"styles/print.css"},"showLevel":false}},"theme":"default","author":"Kuriv Vesti","pdf":{"pageNumbers":true,"fontSize":12,"fontFamily":"Arial","paperSize":"a4","chapterMark":"pagebreak","pageBreaksBefore":"/","margin":{"right":62,"left":62,"top":56,"bottom":56}},"structure":{"langs":"LANGS.md","readme":"README.md","glossary":"GLOSSARY.md","summary":"SUMMARY.md"},"isbn":"","variables":{},"title":"PHP","language":"zh-hans","gitbook":">=3.0.0","description":"PHP 手册","direction":"ltr"},"file":{"path":"docs/函数参考/文本处理/字符串.md","mtime":"2020-05-05T08:36:34.187Z","type":"markdown"},"gitbook":{"version":"3.2.3","time":"2020-07-13T03:43:41.544Z"},"basePath":"../../..","book":{"language":""}});
});
</script>
</div>
<script src="../../../gitbook/gitbook.js"></script>
<script src="../../../gitbook/theme.js"></script>
<script src="../../../gitbook/gitbook-plugin-back-to-top-button/plugin.js"></script>
<script src="../../../gitbook/gitbook-plugin-chapter-fold/chapter-fold.js"></script>
<script src="../../../gitbook/gitbook-plugin-hide-element/plugin.js"></script>
<script src="../../../gitbook/gitbook-plugin-lightbox/js/lightbox.min.js"></script>
<script src="../../../gitbook/gitbook-plugin-search-pro/jquery.mark.min.js"></script>
<script src="../../../gitbook/gitbook-plugin-search-pro/search.js"></script>
<script src="../../../gitbook/gitbook-plugin-splitter/splitter.js"></script>
<script src="../../../gitbook/gitbook-plugin-livereload/plugin.js"></script>
<script src="../../../gitbook/gitbook-plugin-sharing/buttons.js"></script>
<script src="../../../gitbook/gitbook-plugin-fontsettings/fontsettings.js"></script>
</body>
</html>