3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = []; $b += $a;
based on 29tKn
Output for 7.0.0 - 7.2.0
Notice: Undefined variable: b in /in/IlhF2 on line 4 Fatal error: Uncaught Error: Unsupported operand types in /in/IlhF2:4 Stack trace: #0 {main} thrown in /in/IlhF2 on line 4
Process exited with code 255.
Output for 5.4.2 - 5.6.28
Notice: Undefined variable: b in /in/IlhF2 on line 4 Fatal error: Unsupported operand types in /in/IlhF2 on line 4
Process exited with code 255.
Output for 5.3.18 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/IlhF2 on line 3
Process exited with code 255.