3v4l.org

run code in 300+ PHP versions simultaneously
<?php $cases = array(false, 0, 1, 2, 3, 4, 5, true, null); $cnt = count($cases); $ln = 1111111; $s = microtime(true); for ($i = 0; $i < $ln; $i++) { foreach ($cases as $c) { $c = !!$c; } }
Output for 4.3.10 - 4.3.11, 4.4.0 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.37, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.7
Output for 4.3.0 - 4.3.9, 5.0.0 - 5.0.5

Process exited with code 137.
preferences:
156.59 ms | 401 KiB | 210 Q