3v4l.org

run code in 300+ PHP versions simultaneously
<?php class Foo{ private $that; function __construct(){ $this->that = $this; } function __destruct(){ echo "destruct\n"; } } $x = new Foo(); unset($x); echo "wat";
Output for 5.6.0 - 5.6.29, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.6 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
watdestruct
preferences:
132.86 ms | 404 KiB | 223 Q