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<?php $a = array(3, 4); $b =& $a[0]; $c = $a; var_dump($a); unset($b); $c[0] = 5; var_dump($a);
Output for 4.3.0 - 7.1.0
array(2) { [0]=> &int(3) [1]=> int(4) } array(2) { [0]=> int(3) [1]=> int(4) }