3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = isset($b) ? $b : -1; $a = $b ?? -1; echo $a;
Output for 7.0.0 - 7.2.0
-1
Output for 5.4.0 - 5.6.28
Parse error: syntax error, unexpected '?' in /in/eUAoJ on line 3
Process exited with code 255.