3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = 1; $a = a + 1; echo $a;
Output for 7.1.0
Notice: Use of undefined constant a - assumed 'a' in /in/CtY2h on line 2 Warning: A non-numeric value encountered in /in/CtY2h on line 2 1
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.0.14
Notice: Use of undefined constant a - assumed 'a' in /in/CtY2h on line 2 1