3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function test(&$v) { $v = $v + $v; } echo test(8);
Output for 5.4.18 - 5.4.19
Fatal error: Only variables can be passed by reference in /in/Tkb8G on line 8
Process exited with code 255.
Output for 5.3.0 - 5.4.17
Fatal error: Only variables can be passed by reference in /in/L5CJP on line 8
Process exited with code 255.