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function array_diff_uassoc () {
    // Returns the entries of arr1 that have values which are not present in any of the others arguments but do additional checks whether the keys are equal. Elements are compared by user supplied function.  
    // 
    // version: 1008.1718
    // discuss at: http://phpjs.org/functions/array_diff_uassoc    // +   original by: Brett Zamir (http://brett-zamir.me)
    // *     example 1: $array1 = {a: 'green', b: 'brown', c: 'blue', 0: 'red'}
    // *     example 1: $array2 = {a: 'GREEN', B: 'brown', 0: 'yellow', 1: 'red'}
    // *     example 1: array_diff_uassoc($array1, $array2, function (key1, key2){ return (key1 == key2 ? 0 : (key1 > key2 ? 1 : -1)); });
    // *     returns 1: {b: 'brown', c: 'blue', 0: 'red'}    var arr1 = arguments[0], retArr = {}, cb = arguments[arguments.length-1];
    var arr = {}, i = 1, k1 = '', k = '';
    cb = (typeof cb === 'string') ? this.window[cb] : (cb instanceof Array) ? this.window[cb[0]][cb[1]] : cb;
 
    arr1keys:    for (k1 in arr1) {
        for (i=1; i < arguments.length-1; i++) {
            arr = arguments[i];
            for (k in arr) {
                if (arr[k] === arr1[k1] && cb(k, k1) === 0) {                    // If it reaches here, it was found in at least one array, so try next value
                    continue arr1keys;
                }
            }
            retArr[k1] = arr1[k1];        }
    }
 
    return retArr;
}

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$array1 = {a: 'green', b: 'brown', c: 'blue', 0: 'red'}
$array2 = {a: 'GREEN', B: 'brown', 0: 'yellow', 1: 'red'}
array_diff_uassoc($array1, $array2, function (key1, key2){ return (key1 == key2 ? 0 : (key1 > key2 ? 1 : -1)); });

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{b: 'brown', c: 'blue', 0: 'red'}