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<?php $a1 = [ 'a' => 1, 'b' => 2, 'c' => 3, 'd' => 4 ]; $a2 = [ 'b', 'c', ]; var_dump(array_diff_key($a1, $a2));
Output for git.master, git.master_jit, rfc.property-hooks
array(4) { ["a"]=> int(1) ["b"]=> int(2) ["c"]=> int(3) ["d"]=> int(4) }

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