3v4l.org

run code in 300+ PHP versions simultaneously
<?php function foo($x) { switch ($x) { case 1; var_dump('WHAT'); default; var_dump($x); } } foo(1); foo(2);
Output for 5.6.0 - 5.6.27, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.31, 8.2.0 - 8.2.27, 8.3.0 - 8.3.15, 8.4.1 - 8.4.2
string(4) "WHAT" int(1) int(2)
preferences:
50.89 ms | 408 KiB | 5 Q