3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $foo = ""; $foo[] = true; var_dump($foo);
Output for 7.1.0 - 7.2.0
Fatal error: Uncaught Error: [] operator not supported for strings in /in/L1LD4:4 Stack trace: #0 {main} thrown in /in/L1LD4 on line 4
Process exited with code 255.
Output for 4.3.0 - 7.0.20
array(1) { [0]=> bool(true) }