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<?php $items = array(10, 20, 30, 40); $items1 = array(11, 21, 31, 40); $udiff = array_udiff($items, $items1, function ($a, $b) { if ($a < $b) return -1; if ($a > $b) return 1; return 0; }); var_dump($udiff);
Output for git.master, git.master_jit, rfc.property-hooks
array(3) { [0]=> int(10) [1]=> int(20) [2]=> int(30) }

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