3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $array = [1,2]; foreach($array as &$a) { if ($a == 1) { $array[] = 3; } echo $a . "\n"; } echo "----------\n"; echo $a; foreach($array as $a) { echo $a. "\n"; }
based on mNChP
Output for 5.6.0 - 5.6.30, hhvm-3.15.4, 7.0.0 - 7.3.0beta1
1 2 3 ---------- 31 2 2