Use PHP functions in JavaScript

JavaScript array_key_exists

Checks if the given key or index exists in the array

function array_key_exists ( key, search ) {
    // Checks if the given key or index exists in the array  
    // 
    // version: 909.322
    // discuss at: http://phpjs.org/functions/array_key_exists    // +   original by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +   improved by: Felix Geisendoerfer (http://www.debuggable.com/felix)
    // *     example 1: array_key_exists('kevin', {'kevin': 'van Zonneveld'});
    // *     returns 1: true
    // input sanitation    if (!search || (search.constructor !== Array && search.constructor !== Object)){
        return false;
    }
 
    return key in search;}

external links: original PHP docs | raw js source

Examples

Running

1	array_key_exists('kevin', {'kevin': 'van Zonneveld'});

Should return

true

Dependencies

No dependencies, you can use this function standalone.

Open syntax issues

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