PHP's get_defined_functions in JavaScript

Here’s what our current JavaScript equivalent to PHP's get_defined_functions looks like.

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module.exports = function get_defined_functions () { // eslint-disable-line camelcase
// discuss at: http://locutus.io/php/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
// note 1: 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: var $funcs = get_defined_functions()
// example 1: var $found = test_in_array($funcs, 'get_defined_functions')
// example 1: var $result = $found
// returns 1: true
// test: skip-1
var $global = (typeof window !== 'undefined' ? window : global)
$global.$locutus = $global.$locutus || {}
var $locutus = $global.$locutus
$locutus.php = $locutus.php || {}
var i = ''
var arr = []
var already = {}
for (i in $global) {
try {
if (typeof $global[i] === 'function') {
if (!already[i]) {
already[i] = 1
arr.push(i)
}
} else if (typeof $global[i] === 'object') {
for (var j in $global[i]) {
if (typeof $global[j] === 'function' && $global[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
}
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How to use

You you can install via npm install locutus and require it via require('locutus/php/funchand/get_defined_functions'). You could also require the funchand module in full so that you could access funchand.get_defined_functions instead.

If you intend to target the browser, you can then use a module bundler such as Browserify, webpack or rollup.js.

ES5/ES6

This function targets ES5, but as of Locutus 2.0.2 we also support ES6 functions. Locutus transpiles to ES5 before publishing to npm.

A community effort

Not unlike Wikipedia, Locutus is an ongoing community effort. Our philosophy follows The McDonald’s Theory. This means that we don't consider it to be a bad thing that many of our functions are first iterations, which may still have their fair share of issues. We hope that these flaws will inspire others to come up with better ideas.

This way of working also means that we don't offer any production guarantees, and recommend to use Locutus inspiration and learning purposes only.

Notes

  • Test case 1: If get_defined_functions can find itself in the defined functions, it worked :)

Examples

Please note that these examples are distilled from test cases that automatically verify our functions still work correctly. This could explain some quirky ones.

#codeexpected result
1function 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} var $funcs = get_defined_functions() var $found = test_in_array($funcs, 'get_defined_functions') var $result = $foundtrue

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