i m adding an book detail in a page(book_detail.php), when i add book information ,i m also adding offers and addons via iframe( using lightwindow.js) related with that book and i saved their id;s in 2 session array. if someone add 2 addons and 3 offers related to that books, i store those addons_is and offer_id in session and when i fill the all detail regarding that book,on the same time i add addons_is and offer_id in the database in same row. like

book_id|book_name|book_price|book_addons|book_offers|
 1     | php     | 100      |10,11,     | 17,18,19

where 10,11 from table_addon where that addon detail is saved and 17,18,19 is from table_offers where offer details are saved

now my question is: if someone add 2 offers and 3 addons with their detail, and does not go to submit that page( means he does not add details of that book) and go back, then how do i delete that addons and offers from both of tables.means i want to reset session array as well as the entry from both of table , if someone comes again to add new book detail.

kullanımı ilk defa geldiğinde iframe yoluyla eklentileri ekleyerek, sayfa otomatik olarak yenilenecektir çünkü ben, oturumu sıfırlamak değil, bu yüzden sayfa yük oturumu sıfırlamak mümkün değildir