3v4l.org

run code in 300+ PHP versions simultaneously
<?php function foo($x, $x=1, $x=2) { echo $x; } foo(3);
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 - 5.5.37, 5.6.0 - 5.6.28
2
preferences:
273.1 ms | 1397 KiB | 197 Q