JsPHP: a JavaScript library providing the PHP API

function array_combine (keys, values) {
    // http://jsphp.co/jsphp/fn/view/array_combine
    // +   original by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +   improved by: Brett Zamir (http://brett-zamir.me)
    // *     example 1: array_combine([0,1,2], ['kevin','van','zonneveld']);
    // *     returns 1: {0: 'kevin', 1: 'van', 2: 'zonneveld'}
    var new_array = {},
        keycount = keys && keys.length,
        i = 0;

    // input sanitation
    if (typeof keys !== 'object' || typeof values !== 'object' || // Only accept arrays or array-like objects
    typeof keycount !== 'number' || typeof values.length !== 'number' || !keycount) { // Require arrays to have a count
        return false;
    }

    // number of elements does not match
    if (keycount != values.length) {
        return false;
    }

    for (i = 0; i < keycount; i++) {
        new_array[keys[i]] = values[i];
    }

    return new_array;
}