serjioms

generateUUID = function () {
        return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace( /[xy]/g, function ( c ) {
            var r = Math.random() * 16 | 0;
            return ( c == 'x' ? r : ( r & 0x3 | 0x8 ) ).toString( 16 );
        } );
    };

protected function generateUId()
    {
        $idMask = "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx";

        $characters = '0123456789abcdefghijklmnopqrstuvwxyz';
        $result = '';
        for ($i = 0; $i < strlen($idMask); $i++) {
            if ($idMask[$i] == 'x') {
                $result .= $characters[mt_rand(0, 34)];
            } else {
                $result .= "-";
            }
        }
        return $result;
    }