3v4l.org

run code in 500+ PHP versions simultaneously
<?php class W {} class X extends W {} $x = new X; $f = function () { return parent::class; }; print $f->call($x); //function foo(parent $p) { return $this; } ?>
Output for 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.21, 8.5.0 - 8.5.6
W

preferences:
57.71 ms | 844 KiB | 4 Q