3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $b = 16; echo $a ?? 2; echo "<br />"; echo $a ?? $b ?? 7;
Output for 7.0.0 - 7.2.0
2<br />16
Output for 5.3.18 - 5.6.28
Parse error: syntax error, unexpected '?' in /in/VfpmC on line 5
Process exited with code 255.