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

php.js offers community built php functions in javascript

---
layout: page
title: "JavaScript intval function"
comments: true
sharing: true
footer: true
alias:
- /functions/view/intval:435
- /functions/view/intval
- /functions/view/435
- /functions/intval:435
- /functions/435
---
<!-- Generated by Rakefile:build -->
A JavaScript equivalent of PHP's intval

{% codeblock var/intval.js lang:js https://raw.github.com/kvz/phpjs/master/functions/var/intval.js raw on github %}
function intval (mixed_var, base) {
  // From: http://phpjs.org/functions
  // +   original by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
  // +   improved by: stensi
  // +   bugfixed by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
  // +   input by: Matteo
  // +   bugfixed by: Brett Zamir (http://brett-zamir.me)
  // +   bugfixed by: Rafał Kukawski (http://kukawski.pl)
  // *     example 1: intval('Kevin van Zonneveld');
  // *     returns 1: 0
  // *     example 2: intval(4.2);
  // *     returns 2: 4
  // *     example 3: intval(42, 8);
  // *     returns 3: 42
  // *     example 4: intval('09');
  // *     returns 4: 9
  // *     example 5: intval('1e', 16);
  // *     returns 5: 30
  var tmp;

  var type = typeof mixed_var;

  if (type === 'boolean') {
    return +mixed_var;
  } else if (type === 'string') {
    tmp = parseInt(mixed_var, base || 10);
    return (isNaN(tmp) || !isFinite(tmp)) ? 0 : tmp;
  } else if (type === 'number' && isFinite(mixed_var)) {
    return mixed_var | 0;
  } else {
    return 0;
  }
}
{% endcodeblock %}

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

### Example 1
This code
{% codeblock lang:js example %}
intval('Kevin van Zonneveld');
{% endcodeblock %}

Should return
{% codeblock lang:js returns %}
0
{% endcodeblock %}

### Example 2
This code
{% codeblock lang:js example %}
intval(4.2);
{% endcodeblock %}

Should return
{% codeblock lang:js returns %}
4
{% endcodeblock %}

### Example 3
This code
{% codeblock lang:js example %}
intval(42, 8);
{% endcodeblock %}

Should return
{% codeblock lang:js returns %}
42
{% endcodeblock %}


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