3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php for ( $backStep = 1; false; $backStep++ ) { $source = $backStep; } var_dump($source);
Output for 5.0.4 - 7.1.0
Notice: Undefined variable: source in /in/J9FcC on line 11 NULL
Output for 4.3.0 - 5.0.3
Notice: Undefined variable: source in /in/J9FcC on line 11 NULL