3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function f(&$a) {} function g($a) { $v = $a; return $v; } f(g($a));
Output for 7.0.0 - 7.1.0
Notice: Undefined variable: a in /in/sloCm on line 6 Notice: Only variables should be passed by reference in /in/sloCm on line 6
Output for 5.1.0 - 5.6.28
Notice: Undefined variable: a in /in/sloCm on line 6 Strict Standards: Only variables should be passed by reference in /in/sloCm on line 6
Output for 5.0.5
Notice: Undefined variable: a in /in/sloCm on line 6 Fatal error: Only variables can be passed by reference in /in/sloCm on line 6
Process exited with code 255.
Output for 5.0.4
Notice: Undefined variable: a in /in/sloCm on line 6
Output for 4.3.0 - 5.0.3
Notice: Undefined variable: a in /in/sloCm on line 6