3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php function foo() { return null; } if (empty($res = foo())) { echo 'it works'; } else { echo 'it fails'; }
Output for 5.5.0 - 5.6.30, hhvm-3.10.1 - 3.17.3, 7.0.0 - 7.1.7
it works
Output for 5.3.0 - 5.4.45
Parse error: syntax error, unexpected '=', expecting ')' in /in/G1kiC on line 7
Process exited with code 255.