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