need help on how to utilise paypal with my website

[davids_media]

I have spent the last few months working on an e-commerce project. However, I am a complete newbie in regards to setting up paypal completely with an e-commerce site.

 

I have set up a Paypal developer account and I know how to create test accounts in Sandbox. But other than that, I am clueless as to what to do.

 

I have my orders table set up, here is my create table code for that (I know its NOT php);

 

CREATE TABLE `order` (
  `order_id` varchar(32) NOT NULL,
  `order_amount` float(6,2) DEFAULT NULL,
  `order_cart` varchar(255) DEFAULT NULL,
  `order_status` varchar(64) DEFAULT NULL,
  `order_signature` varchar(64) DEFAULT NULL,
  `order_transaction` varchar(32) DEFAULT NULL,
  `order_payer` varchar(32) DEFAULT NULL,
  `order_receiver` varchar(32) DEFAULT NULL,
  `order_receipt` varchar(32) DEFAULT NULL,
  `order_ipn` varchar(32) DEFAULT NULL,
  `order_pub` int(10) DEFAULT NULL,
  `order_vis` int(1) DEFAULT NULL,
  PRIMARY KEY (`order_id`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8;

 

So thats my table "orders". I have an item page which users view an item based on a search they make. A friend of mine also gave me some IPN code and a file called toolbox.php but I am struggling to get my head around it.

 

Since I am selling physical products and NOT digital items, how do I go about doing this please? I have attached the essential files to this topic.

18489_.php

18490_.php

18491_.php