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run code in 150+ php & hhvm versions
Bugs & Features
<?php $a=array(1, 2, 3, 4, 5); foreach($a as $k=>$v) { $a[$k]++; } var_dump($a); foreach($a as $k=>$v) { $a[$k]++; } var_dump($a);
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
array(5) { [0]=> int(2) [1]=> int(3) [2]=> int(4) [3]=> int(5) [4]=> int(6) } array(5) { [0]=> int(3) [1]=> int(4) [2]=> int(5) [3]=> int(6) [4]=> int(7) }