Online PHP editor | output for lmYGB

<?php class T { public $attr = [1,2,3]; } $t = function(){ var_dump($this->attr); }; $c1 = Closure::bind($t, new T()); $c1();die; abstract class T { static public $instanses; final private function __construct(){ } public static function getInstance() { var_dump(static::$instanses); if (!(static::$instanses instanceof static)) { static::$instanses = new static; } var_dump(static::$instanses); return static::$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(); ?>