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<?php $x = array('a'=>1,'c'=>5); $y = array_merge(array('a'=>2, 'b'=>4, 'c'=>6), $x); var_dump($y);
Output for git.master, git.master_jit, rfc.property-hooks
array(3) { ["a"]=> int(1) ["b"]=> int(4) ["c"]=> int(5) }

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