3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = null; $b = [4,5,6]; $a += $b; var_dump($a);
based on 7s6Mf
Output for 7.0.0 - 7.2.0
Fatal error: Uncaught Error: Unsupported operand types in /in/A2WW1:5 Stack trace: #0 {main} thrown in /in/A2WW1 on line 5
Process exited with code 255.
Output for 5.5.0 - 5.6.28
Fatal error: Unsupported operand types in /in/A2WW1 on line 5
Process exited with code 255.