3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $var = 'asdf'; $ary = array(); $ary['foo'] .= 'jkl;'.$var; echo $ary['foo'];
Output for 5.3.0 - 5.6.28, 7.0.0 - 7.1.0
Notice: Undefined index: foo in /in/VaghN on line 6 jkl;asdf
Output for hhvm-3.10.0 - 3.12.0
jkl;asdf
Output for 4.3.0 - 5.2.17
Notice: Undefined index: foo in /in/VaghN on line 6 jkl;asdf