3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function f(&$x) {echo $x;} $x = 1; f([1, 2]); echo $x;
Output for 5.4.0 - 5.4.21
Fatal error: Only variables can be passed by reference in /in/Ur5Z4 on line 4
Process exited with code 255.
Output for 5.3.0 - 5.3.27
Parse error: syntax error, unexpected '[', expecting ')' in /in/Ur5Z4 on line 4
Process exited with code 255.