3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $foo = 0; $bar = function() use (&$foo) { return ++ $foo; }; $a = $bar(); $b = $bar(); $c = $bar(); var_dump($a ?? $b ?? $c, $foo );
based on 4qLPu
Output for 7.0.0 - 7.2.0
int(1) int(3)
Output for 5.3.20 - 5.6.28
Parse error: syntax error, unexpected '?' in /in/GjcPu on line 7
Process exited with code 255.