3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php class O {} $my = new O(); //echo (string) $my; array($my => 3);
based on ar5A0
Output for 4.3.9 - 5.6.28, 7.0.0 - 7.1.0
Warning: Illegal offset type in /in/D2P8m on line 8
Output for hhvm-3.10.0 - 3.12.0
Warning: Invalid operand type was used: Invalid type used as key in /in/D2P8m on line 8
Output for 4.3.0 - 4.3.8