3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php error_reporting(-1); $a = []; $a['key'] ?? true;
based on Im85v
Output for 7.0.0 - 7.2.0
Output for 5.4.12 - 5.6.28
Parse error: syntax error, unexpected '?' in /in/grvBE on line 4
Process exited with code 255.
Output for 5.3.22 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/grvBE on line 3
Process exited with code 255.