3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $atts = ''; if ( isset($atts['width']) ) { echo "hi"; }
Output for 4.3.3 - 7.1.0
Output for 4.3.0 - 4.3.2
Notice: Uninitialized string offset: 0 in /in/Em8sZ on line 3