form submited to database and display result

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PHP

MySQL

Hi all

i have been looking around for a form that can submit data into the database and display a result , i need an example of a form like , select a phone and a model then , if a customer select a type of item , let's say a model or brand of a phone , then click on submit , it automatically display a result of how much it cost from the database . can somebody help me ?

below is the link of a form i have been looking for :

i just need any guidance how to make this...

http://www.mrunlock.com/[^]


on this page there is a form that u enter and it fetch the result which display the cost .

any help will be great appreciated .