3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = 1; $b = 2; $c = 3; $d = 4; $e = $a ?? $b ?? $c <==> $d;
Output for 7.0.0
Parse error: syntax error, unexpected '=>' (T_DOUBLE_ARROW) in /in/3LsWM on line 6
Process exited with code 255.
Output for 5.3.20 - 5.6.16
Parse error: syntax error, unexpected '?' in /in/3LsWM on line 6
Process exited with code 255.