3v4l.org

run code in 300+ PHP versions simultaneously
<?php function foo(&$val, $val) { echo $val; } $v = 10; foo($v, 100);
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 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 - 5.5.38, 5.6.0 - 5.6.28
100
preferences:
247.06 ms | 1397 KiB | 200 Q