$array1 = [12,14,22];
$array2 = [8,9,22,30];

# Olmayanlar
print_r(array_diff($array2, $array1)); // [8, 9, 30]

# Birleştir
print_r(array_merge($array2, $array1)); // [8, 9, 22, 30, 12, 14, 22]