how to add shopping cart in Custom Hosting Billing Script?

[kunnusingh]

hi,

i am work on my Custom Hosting Billing Script(35% completed)

few hours ago i am add Domain Checker, Register Option in my custom script but now i want to add "Add to Cart" and "Checkout Function" into my php billing script.


also i want to learn about "Shopping Cart Function"

please help me, i really need good tutorial or your help.

[kunnusingh]

i am learn some "Build a shipping cart admin tool for your script" but still i can't understand.

if you know how to add then please explain.