3v4l.org

run code in 300+ PHP versions simultaneously
<?php $x = new stdclass; $x->{42} = 1337; $x = (array)$x; foreach ($x as $key => $value) { if (!array_key_exists($key, $x)) echo 'lolphp'; } ?>
Output for 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 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Output for 5.4.2 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33
lolphp
preferences:
205.22 ms | 402 KiB | 269 Q