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<?php $a = ['x', 'y', 'z']; $x =& $a; var_dump($x, $y, $z);
Output for git.master_jit, git.master
Warning: Undefined variable $y in /in/AFiIB on line 6 Warning: Undefined variable $z in /in/AFiIB on line 6 array(3) { [0]=> string(1) "x" [1]=> string(1) "y" [2]=> string(1) "z" } NULL NULL

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