3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = [1,2,3]; $b = &$a; foreach($a as $v) {echo "$v-"; unset($a[1]); echo "$v\n";} var_dump($a); ?>
based on MA575
Output for 7.0.0 - 7.2.0
1-1 2-2 3-3 array(2) { [0]=> int(1) [2]=> int(3) }
Output for 5.5.0 - 5.6.28
1-1 3-3 array(2) { [0]=> int(1) [2]=> int(3) }