Online PHP editor | output for sOZau

<?php class XYZ{ static $mama = 1; var $papa = 1; } class ABCD extends XYZ { const girl = 2; static $boy = 3; function xyz($a) { $this->hello = self::girl + ABCD::girl + $a*2 + self::$boy + ABCD::$boy + parent::$mama; return $this->hello; } } $me = new ABCD(); echo $me->xyz(1) + $me->papa;