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<?php $arr =[['c' => 3], ['a' => 1, 'b' => 2, 'c' => 3], ['c' => 3]]; $new = $arr[0]; foreach($arr as $sub){ $new = array_intersect_key($new, $sub); } foreach($arr as &$sub){ $sub =array_intersect_key($sub, $new); } Var_dump($arr);
Output for git.master, git.master_jit, rfc.property-hooks
array(3) { [0]=> array(1) { ["c"]=> int(3) } [1]=> array(1) { ["c"]=> int(3) } [2]=> &array(1) { ["c"]=> int(3) } }

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