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run code in 200+ php & hhvm versions
Bugs & Features
<?php $array = array(10); $array[5] = &$array[0]; $b = $array; unset($array[0]); $c = $array; ++$array[5]; var_dump($b, $c); var_dump(array_values($c));
based on Hun6m
Output for 4.3.0 - 7.2.0
array(2) { [0]=> &int(11) [5]=> &int(11) } array(1) { [5]=> &int(11) } array(1) { [0]=> &int(11) }