3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php while(($i++ ?? ($i = 0)) < 3) exit;
Output for 7.0.0 - 7.2.0
Notice: Undefined variable: i in /in/svJeB on line 3
Output for 5.3.20 - 5.6.28
Parse error: syntax error, unexpected '?' in /in/svJeB on line 3
Process exited with code 255.