3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = null; empty($a) or unset($a); var_dump(isset($a));
Output for 5.4.0 - 5.4.29
Parse error: syntax error, unexpected 'unset' (T_UNSET) in /in/OBDdJ on line 4
Process exited with code 255.
Output for 5.3.0 - 5.3.28
Parse error: syntax error, unexpected T_UNSET in /in/OBDdJ on line 4
Process exited with code 255.