3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function a($x){ $x += 1; } $y = 5; a(&$y); echo $y;
Output for 5.4.0 - 5.5.12
Fatal error: Call-time pass-by-reference has been removed; If you would like to pass argument by reference, modify the declaration of a(). in /in/5e8Gn on line 9
Process exited with code 255.
Output for 5.3.0 - 5.3.29
Deprecated: Call-time pass-by-reference has been deprecated; If you would like to pass it by reference, modify the declaration of a(). If you would like to enable call-time pass-by-reference, you can set allow_call_time_pass_reference to true in your INI file in /in/5e8Gn on line 9 6