3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = [1]; foreach($a as &$v) {echo "$v\n"; $a[1]=2;}
based on 3QBdk
Output for 7.0.0 - 7.2.0
1 2
Output for 5.4.9 - 5.6.28
1
Output for 5.3.19 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/p71vN on line 2
Process exited with code 255.