phpjs/_octopress/source/functions/ord/index.markdown

php.js offers community built php functions in javascript

---
layout: page
title: "JavaScript ord function"
comments: true
sharing: true
footer: true
alias:
- /functions/view/ord:483
- /functions/view/ord
- /functions/view/483
- /functions/ord:483
- /functions/483
---
<!-- Generated by Rakefile:build -->
A JavaScript equivalent of PHP's ord

{% codeblock strings/ord.js lang:js https://raw.github.com/kvz/phpjs/master/functions/strings/ord.js raw on github %}
function ord (string) {
  // From: http://phpjs.org/functions
  // +   original by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
  // +   bugfixed by: Onno Marsman
  // +   improved by: Brett Zamir (http://brett-zamir.me)
  // +   input by: incidence
  // *     example 1: ord('K');
  // *     returns 1: 75
  // *     example 2: ord('\uD800\uDC00'); // surrogate pair to create a single Unicode character
  // *     returns 2: 65536
  var str = string + '',
    code = str.charCodeAt(0);
  if (0xD800 <= code && code <= 0xDBFF) { // High surrogate (could change last hex to 0xDB7F to treat high private surrogates as single characters)
    var hi = code;
    if (str.length === 1) {
      return code; // This is just a high surrogate with no following low surrogate, so we return its value;
      // we could also throw an error as it is not a complete character, but someone may want to know
    }
    var low = str.charCodeAt(1);
    return ((hi - 0xD800) * 0x400) + (low - 0xDC00) + 0x10000;
  }
  if (0xDC00 <= code && code <= 0xDFFF) { // Low surrogate
    return code; // This is just a low surrogate with no preceding high surrogate, so we return its value;
    // we could also throw an error as it is not a complete character, but someone may want to know
  }
  return code;
}
{% endcodeblock %}

 - [Raw function on GitHub](https://github.com/kvz/phpjs/blob/master/functions/strings/ord.js)

Please note that php.js uses JavaScript objects as substitutes for PHP arrays, they are 
the closest match to this hashtable-like data structure. 

Please also note that php.js offers community built functions and goes by the 
[McDonald's Theory](https://medium.com/what-i-learned-building/9216e1c9da7d). We'll put online 
functions that are far from perfect, in the hopes to spark better contributions. 
Do you have one? Then please just: 

 - [Edit on GitHub](https://github.com/kvz/phpjs/edit/master/functions/strings/ord.js)

### Example 1
This code
{% codeblock lang:js example %}
ord('K');
{% endcodeblock %}

Should return
{% codeblock lang:js returns %}
75
{% endcodeblock %}

### Example 2
This code
{% codeblock lang:js example %}
ord('\uD800\uDC00'); // surrogate pair to create a single Unicode character
{% endcodeblock %}

Should return
{% codeblock lang:js returns %}
65536
{% endcodeblock %}


### Other PHP functions in the strings extension
{% render_partial _includes/custom/strings.html %}