3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = 1; $a = a + 1; echo $a; ?>
based on gJ3vK
Output for 7.1.0
Notice: Use of undefined constant a - assumed 'a' in /in/UvOZP on line 1 Warning: A non-numeric value encountered in /in/UvOZP on line 1 1
Output for 4.3.0 - 7.0.14
Notice: Use of undefined constant a - assumed 'a' in /in/UvOZP on line 1 1