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<?php $items = array(new \stdClass(), new \stdClass()); $udiff = array_udiff($items, $items, function ($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(0) { }

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