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); gc_collect_cycles(); echo "wat";
Output for 5.6.0 - 5.6.30, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.5 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
destruct wat
preferences:
76.88 ms | 1569 KiB | 4 Q