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<?php function key_compare_func($key1, $key2) { if ($key1 == $key2) return 0; else if ($key1 > $key2) return 1; else return -1; } $a=new stdClass; $a->{"0"}=1; $a->n=2; var_dump(array_diff_key((array)$a, [0])); var_dump(array_diff_ukey((array)$a, [0], 'key_compare_func'));
Output for git.master, git.master_jit, rfc.property-hooks
array(1) { ["n"]=> int(2) } array(1) { ["n"]=> int(2) }

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