---
layout: page
title: "JavaScript get_defined_functions function"
comments: true
sharing: true
footer: true
alias:
- /functions/view/get_defined_functions:413
- /functions/view/get_defined_functions
- /functions/view/413
- /functions/get_defined_functions:413
- /functions/413
---
<!-- Generated by Rakefile:build -->
A JavaScript equivalent of PHP's get_defined_functions

{% codeblock funchand/get_defined_functions.js lang:js https://raw.github.com/kvz/phpjs/master/functions/funchand/get_defined_functions.js raw on github %}
function get_defined_functions () {
  // From: http://phpjs.org/functions
  // +   original by: Brett Zamir (http://brett-zamir.me)
  // +   improved by: Brett Zamir (http://brett-zamir.me)
  // %        note 1: Test case 1: If get_defined_functions can find itself in the defined functions, it worked :)
  // *     example 1: function test_in_array (array, p_val) {for(var i = 0, l = array.length; i < l; i++) {if(array[i] == p_val) return true;} return false;}
  // *     example 1: funcs = get_defined_functions();
  // *     example 1: found = test_in_array(funcs, 'get_defined_functions');
  // *     example 1: found;
  // *     returns 1: true
  var i = '',
    arr = [],
    already = {};

  for (i in this.window) {
    try {
      if (typeof this.window[i] === 'function') {
        if (!already[i]) {
          already[i] = 1;
          arr.push(i);
        }
      } else if (typeof this.window[i] === 'object') {
        for (var j in this.window[i]) {
          if (typeof this.window[j] === 'function' && this.window[j] && !already[j]) {
            already[j] = 1;
            arr.push(j);
          }
        }
      }
    } catch (e) {
      // Some objects in Firefox throw exceptions when their properties are accessed (e.g., sessionStorage)
    }
  }

  return arr;
}
{% endcodeblock %}

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

### Example 1
This code
{% codeblock lang:js example %}
function test_in_array (array, p_val) {for(var i = 0, l = array.length; i < l; i++) {if(array[i] == p_val) return true;} return false;}
funcs = get_defined_functions();
found = test_in_array(funcs, 'get_defined_functions');
found;
{% endcodeblock %}

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


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