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<?php $a = array("a" => "green", "b" => "brown", "c" => "blue", "red"); $b = array("a" => "green", "yellow", "red"); $c = array("c" => "blue"); print_r(array_diff_key($a, $b, $c));
Output for git.master, git.master_jit, rfc.property-hooks
Array ( [b] => brown )

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