3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = array('first');if (isset($a[0]['some string'])) { print "What?" . PHP_EOL; }
Output for 5.0.0 - 5.0.2, 5.4.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
Output for 4.3.10 - 4.4.9, 5.0.3 - 5.3.29
What?
Output for 4.3.0 - 4.3.9
Notice: Use of undefined constant PHP_EOL - assumed 'PHP_EOL' in /in/hNOIq on line 4 What?PHP_EOL