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run code in 200+ php & hhvm versions
Bugs & Features
<?php $b = [1, 2, 3]; foreach($b ?: [] as &$v){ $v = $v*2; unset($v); } var_dump($b);
Output for 7.0.0 - 7.2.0
array(3) { [0]=> int(1) [1]=> int(2) [2]=> int(3) }
Output for 5.5.0 - 5.6.28
array(3) { [0]=> int(2) [1]=> int(4) [2]=> int(6) }