3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php for( $d=72;$a=52,$c = 63, $d > $c; $d -= 20) { echo $a . ' ' .$b . ' ' .$c; }
based on 9K5au
Output for 5.0.4 - 7.1.0
Notice: Undefined variable: b in /in/o28DM on line 4 52 63
Output for 4.3.0 - 5.0.3
Notice: Undefined variable: b in /in/o28DM on line 4 52 63