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run code in 300+ PHP versions simultaneously
<?php class B{ static $bobo; } class A{ function __destruct(){ echo "2: "; debug_zval_dump($this); B::$bobo = $this; echo "3: "; debug_zval_dump($this); B::$bobo = null; echo "4: "; debug_zval_dump($this); } } $x = new A; echo "1: "; debug_zval_dump($x); unset($x);

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50.03 ms | 402 KiB | 5 Q