3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function func(&$c) { $r++; } $r = 1; func(func($r)) ; echo $r;
Output for 7.0.0 - 7.1.0
Notice: Undefined variable: r in /in/VUTrF on line 5 Notice: Only variables should be passed by reference in /in/VUTrF on line 8 Notice: Undefined variable: r in /in/VUTrF on line 5 1
Output for 5.1.0 - 5.6.28
Notice: Undefined variable: r in /in/VUTrF on line 5 Strict Standards: Only variables should be passed by reference in /in/VUTrF on line 8 Notice: Undefined variable: r in /in/VUTrF on line 5 1
Output for 5.0.5
Notice: Undefined variable: r in /in/VUTrF on line 5 Fatal error: Only variables can be passed by reference in /in/VUTrF on line 8
Process exited with code 255.
Output for 5.0.4
Notice: Undefined variable: r in /in/VUTrF on line 5 Notice: Undefined variable: r in /in/VUTrF on line 5 1
Output for 4.3.0 - 5.0.3
Notice: Undefined variable: r in /in/VUTrF on line 5 Notice: Undefined variable: r in /in/VUTrF on line 5 1