3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a=array(); echo $a['D']++; echo $a['D']++;echo $a['D']++; echo $a['D']++; echo $a['D']++; echo $a['D']++;
Output for 5.3.0 - 5.6.28, 7.0.0 - 7.1.0
Notice: Undefined index: D in /in/pi4Va on line 5 12345
Output for hhvm-3.10.0 - 3.12.0
12345
Output for 4.3.0 - 5.2.17
Notice: Undefined index: D in /in/pi4Va on line 5 12345