3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $b; $b = is_array(null); echo b;
Output for 5.1.0 - 7.1.0
Notice: Use of undefined constant b - assumed 'b' in /in/FcP0O on line 6 b
Output for 5.0.4 - 5.0.5
Notice: Undefined variable: b in /in/FcP0O on line 3 Notice: Use of undefined constant b - assumed 'b' in /in/FcP0O on line 6 b
Output for 4.3.0 - 5.0.3
Notice: Undefined variable: b in /in/FcP0O on line 3 Notice: Use of undefined constant b - assumed 'b' in /in/FcP0O on line 6 b