3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $c = 'yep, this is set'; var_dump($a ?? $b ?? $c);
Output for 7.0.0 - 7.2.0
string(16) "yep, this is set"
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.6.28
Parse error: syntax error, unexpected '?' in /in/an4b8 on line 5
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '?' in /in/an4b8 on line 5
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/an4b8 on line 5
Process exited with code 255.