3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php echo 2+a;
Output for 7.1.0
Notice: Use of undefined constant a - assumed 'a' in /in/8cJLs on line 2 Warning: A non-numeric value encountered in /in/8cJLs on line 2 2
Output for 4.3.0 - 7.0.14
Notice: Use of undefined constant a - assumed 'a' in /in/8cJLs on line 2 2