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<?php $arr = array( 1 => array(1,2,3, null, 1, null), 2 => array(1,null,3,null,null) ); $result=array_intersect_assoc(array_filter($arr[1]), array_filter($arr[2])); print_r($result);
Output for git.master, git.master_jit, rfc.property-hooks
Array ( [0] => 1 [2] => 3 )

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