$array1 = array(10, 50, 80, 40, 90);
$array2 = array(10, 30, 10, 40, 20);
$array3 = array(10, 60, 15, 40, 30);
$array4 = array(20, 30, 40, 10, 50);
$array5 = array(10, 05, 10, 90, 40);

$unArray = array_unique( array_diff_assoc( $idCliArray, array_unique( $idCliArray ) ) )