sql library database schema stackoverflow

1 $firstName = $_POST['firstName'];
2 $lastName = $_POST['lastName'];
3 $address = $_POST['address'];
4
5 $id = generateId();
6
7 $person_insert = "insert into person values (" . $id . ", " . $firstName . ", " . $lastName . ")";
8 $address_insert = "insert into address values (" . $address . ", " . $id . ")";
9
10 mysql_execute($person_insert);
11 mysql_execute($address_insert);
12