3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $heading = 'h2'; echo ++$heading . "\n"; echo $heading + 1;
Output for 7.1.0 - 7.2.0
h3 Warning: A non-numeric value encountered in /in/2r6vu on line 5 1
Output for 4.3.0 - 7.0.20
h3 1