Online PHP editor | output for Dff0N

<?php function converTo($date, $format = 'Y-m-d', $default = null, callable $funcExc = null ) { if (empty($date)) { return $default; } if (!is_string($format)) { throw new \InvalidArgumentException("Неверный формат"); } try { if (!($date instanceof \DateTime)) { if (is_numeric($date) && ( strlen($timestamp) == 13 || strlen($timestamp) == 10 )) { $date = new \DateTime("@" . $date); } elseif (strtotime($date) !== false) { $date = new \DateTime("@" . strtotime($date)); } else { $date = new \DateTime($date); } } if(!($date = $date->format($format))) { throw new \InvalidArgumentException("Произошла ошибка при приведению к заданному формату: " . $format); } } catch (\Exception $e) { if ($funcExc !== null) { call_user_func($funcExc, $date); } throw $e; } return $date; } var_dump(converTo([])); die; abstract class T { static public $instanses; final private function __construct(){ } public static function getInstance() { if (!(static::$instanses instanceof static)) { static::$instanses = new static; } return static::$instanses; } } class A extends T { static public $instanses; } class B extends A { static public $instanses; } $t = A::getInstance(); var_dump($t); $t1 = B::getInstance(); var_dump($t1); new B(); ?>