3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php echo is_array($a)?'true':'false';
Output for 5.0.4 - 7.1.0
Notice: Undefined variable: a in /in/0AW2f on line 2 false
Output for 4.3.0 - 5.0.3
Notice: Undefined variable: a in /in/0AW2f on line 2 false