3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function add($a){ $a += 2;} $b = 2; add(&$b); echo $b;
Output for 5.4.0 - 5.4.20
Fatal error: Call-time pass-by-reference has been removed; If you would like to pass argument by reference, modify the declaration of add(). in /in/svJcr on line 4
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 add(). 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/svJcr on line 4 4