3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $v = ''; $v[] = 1; var_dump($v);
Output for 7.1.0
Fatal error: Uncaught Error: [] operator not supported for strings in /in/Ys0DC:4 Stack trace: #0 {main} thrown in /in/Ys0DC on line 4
Process exited with code 255.
Output for 4.3.0 - 5.6.25, hhvm-3.10.0 - 3.13.2, 7.0.0 - 7.0.14
array(1) { [0]=> int(1) }