3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function f() { return [ 'a' => 'b' ]; } var_dump(isset(f()));
Output for 5.4.0 - 5.4.24
Fatal error: Can't use function return value in write context in /in/rifQL on line 10
Process exited with code 255.
Output for 5.3.0 - 5.3.28
Parse error: syntax error, unexpected '[' in /in/rifQL on line 4
Process exited with code 255.