3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php var_dump(isset(null)); var_dump(isset(false)); var_dump(isset(true));
Output for hhvm-3.10.0 - 3.12.0
bool(false) bool(true) bool(true)
Output for 5.4.0 - 5.4.16
Parse error: syntax error, unexpected ')', expecting :: (T_PAAMAYIM_NEKUDOTAYIM) in /in/rum6c on line 2
Process exited with code 255.
Output for 5.3.0 - 5.3.26
Parse error: syntax error, unexpected ')', expecting T_PAAMAYIM_NEKUDOTAYIM in /in/rum6c on line 2
Process exited with code 255.