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<?php class A { public $state = 'not destructed'; public function __destruct() { $this->state = 'destructed'; } } class B { protected $a; public function __construct(A $a) { $this->a = $a; } public function __destruct() { var_dump($this->a->state); } } $a = new A; $b = new B($a); // prevent early destruction by binding to an error handler (one of the last things that is freed) set_error_handler(function() use($b) {});

preferences:
64.9 ms | 402 KiB | 5 Q