3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $heading = 'h2'; echo ++$heading . '\n'; echo $heading + 1;
Output for 7.1.0
h3\n Warning: A non-numeric value encountered in /in/tj1On on line 5 1
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.13.2, 7.0.0 - 7.0.14
h3\n1