JavaScript get_defined_functions

Returns an array of all defined functions

function get_defined_functions () {
    // Returns an array of all defined functions  
    // 
    // version: 1008.1718
    // discuss at: http://phpjs.org/functions/get_defined_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');
    // *     results 1: found == 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;
}

external links: original PHP docs | raw js source

Examples

Running

1
2
3

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');

Should result in

1	found == true

Dependencies

No dependencies, you can use this function standalone.

Open syntax issues

php.js uses JsLint to help us keep our code consistent and prevent some common bugs.

Eventually we want all code to pass or at least take into consideration most fixes suggested by JsLint, following this JsLint configuration we’ve decided on.

Authors

Thanks to the following developers, you get to have get_defined_functions goodness in JavaScript.

Brett Zamir ( original improved )

Comments

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Use:

[CODE]
your_stuff('here');
[/CODE]

for proper code formatting
By submitting code here you are allowing us to use it in php.js hence dual licensing it under the MIT and GPL licenses

Kevin van Zonneveld
30 Dec '08

@ Brett Zamir: Awesome!

Brett Zamir
21 Dec '08

And here's get_defined_vars(). As far as iterating deeper over its object properties to get a few other globals, the function turns up 'document' and 'location' which would not otherwise be present.

[CODE="Javascript"]
function get_defined_vars() {

var i = '', ct = 0, obj = {};

for (i in window) {
try {
// if (typeof window[i] !== 'function') { // Uncomment if wish to ignore functions (though in JavaScript, they really are variables) // sessionStorage gives errors here in Mozilla
obj[i] = window[i];
if (typeof window[i] === 'object') {
for (var j in window[i]) { // 'history', 'globalStorage' gives errors here in Mozilla
if (window[j] !== undefined) { // window/parent/top/frames/self give errors here in Mozilla
// if (typeof window[j] !== 'function') { // Uncomment if wish to ignore functions (though in JavaScript, they really are variables)
obj[j] = window[j];
// }
}
}
}
// }
}
catch (e) {
}
ct++;
}
// window.length = ct; // Uncomment if wish to create an array-like object
return obj;
}[/CODE]

Brett Zamir
21 Dec '08

Here's a slight improvement...For some reason, in Mozilla at least, you actually have to iterate over the window properties which are objects to get a few other globals not returned by a mere iteration of window itself (in Mozilla, these are: QueryInterface, addEventListener, getComputedStyle).

[CODE="Javascript"]function get_defined_functions() {
// http://kevin.vanzonneveld.net
// + original by: Brett Zamir
// % 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');
// * results 1: found == true

var i = '', arr = [], already = {};

for (i in window) {
try {
if (typeof window[i] === 'function') {
if (!already[i]) {
already[i] = 1;
arr.push(i);
}
}
else if (typeof window[i] === 'object') {
for (var j in window[i]) {
if (typeof window[j] === 'function' && window[j] && !already[j]) {
already[j] = 1;
arr.push(j);
}
}
}
}
catch (e) {

}
}

return arr;
}
[/CODE]

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