3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = array(1=>2); foreach ($a as $key => $val) { $a[$key+1] = $val + 1; var_dump($a); } var_dump($a);
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.13.2, 7.0.0 - 7.1.0
array(2) { [1]=> int(2) [2]=> int(3) } array(2) { [1]=> int(2) [2]=> int(3) }