3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $t = $r ?? 1; echo $t;
based on XmitM
Output for 7.0.0 - 7.2.0
1
Output for 5.3.21 - 5.6.28
Parse error: syntax error, unexpected '?' in /in/0fvf3 on line 2
Process exited with code 255.