3v4l.org

run code in 300+ PHP versions simultaneously
<?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) {});
Output for 5.4.14, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
string(10) "destructed"
Output for 5.1.1
Parse error: syntax error, unexpected T_FUNCTION, expecting ')' in /in/VREes on line 21
Process exited with code 255.
preferences:
131.84 ms | 406 KiB | 5 Q