Order placing mechanism and Multi-table entry

I am doing this project, which is basically few modules from an ERP using PHP/MySQL (codeigniter framework).

I'm not sure how should I integrate the Order Placing mechanism (and other multi table dependent) features.
Eg. Customer's Order is managed by two MySQL tables, (Order and Order-Detail).
Order tables stores general order information, while Order-Detail stores ordered product information (quantity etc.), since an order can have more than one product ordered.

So, my questions are:
- How is this thing basically implemented (the logic behind it)?
- How it is called in the industry jargon (so I can google for ready JavaScript/AJAX or PHP libraries or snipets)?
Who is Participating?
MathiyazhaganConnect With a Mentor Commented:

I think you need for a help on "shopping cart" which includes Categories, Product List, Products, Payment gateway & Order management system.

Basically a product page contains "Add to cart" button which adds the product in shopping cart. In the cart page you can get billing address, shipping address & payment. If payment made successful the order will be placed in the order table.

You can have product listing pages under different categories.

Check some shopping cart application for more information on this.
psybaronConnect With a Mentor Author Commented:
Yes, I might integrate shopping cart for the customer's interface. But still, since this is an ERP, I will need to use forms that upon submit will submit data to more than one table.

I want to ability my form to have for example (+) button, when upon clicking new form elements will appear (new line) and one can new product. And again, new one if clicked. When submitted, this will result in one entry in the main table (general info) and eg. 3 entires in the details table.

I hope I'm transmitting my idea clearly. Please ask for clarification.
psybaronAuthor Commented:
I decided to use my own way of Master/Detail entries, from within the same form. Thank for the help.
psybaronAuthor Commented:
Asking this question, I realized roughly the solution. The Expert gave me a good idea in implementing the front end of the application. Thank  you!
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