3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $foo[] = x; print $foo;
Output for 5.4.0 - 5.6.28, hhvm-3.10.0 - 3.13.2, 7.0.0 - 7.1.0
Notice: Use of undefined constant x - assumed 'x' in /in/jmFVl on line 2 Notice: Array to string conversion in /in/jmFVl on line 3 Array
Output for 4.3.0 - 5.3.29
Notice: Use of undefined constant x - assumed 'x' in /in/jmFVl on line 2 Array