PayPal

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Contents

Introduction

PayPal is both a complicated technology as well as being a very useful one for both developers and customers alike who wish to carry out on-line transactions.

SandBox

An important part of the PayPal development cycle is testing through the SandBox facility that PayPal offers. To use this the following steps must be carried out:

  1. Create an account at the following link - PayPal SandBox; remember not to use your REAL PayPal account settings.
  2. Get familiar with the interface, and all the links available. The most important area is the SandBox area, this is where you will create dummy accounts to test the transaction elements of your site.
  3. Get started and create a Personal account; this will allow you to test the buying mechanisms of your shop from a user perspective.

The last point it to remember before you start testing is to log into the PayPal Developer Central and then set your form method value to the SandBox URL which is https://www.sandbox.paypal.com/cgi-bin/webscr

PayPal - Instant Payment Notification

Instant Payment Notification (IPN) is PayPal's interface for handling real-time purchase confirmation and server-to-server communications. IPN delivers immediate notification and confirmation of PayPal payments you receive and provides status and additional data on pending, cancelled, or failed transactions.

Variables

  • [mc_gross] => 10.00
  • [address_status] => confirmed
  • [payer_id] => UZLK
  • [tax] => 0.00
  • [address_street] =>
  • [payment_date] => 10:14:15 Oct 17, 2006 PDT
  • [payment_status] => Pending
  • [charset] => windows-1252
  • [address_zip] =>
  • [first_name] => Business
  • [address_country_code] => GB
  • [address_name] =>
  • [notify_version] => 2.1
  • [custom] => new_member:-test:-07980615878
  • [payer_status] => verified
  • [address_country] => United Kingdom
  • [address_city] =>
  • [quantity] => 1
  • [verify_sign] => A3pHxLnhYKIfeUxz.t3Jl5nMf7fvAGRQyZy7
  • [payer_email] =>
  • [txn_id] => 0
  • [payment_type] => instant
  • [payer_business_name] =>
  • [last_name] => Business
  • [address_state] =>
  • [receiver_email] =>
  • [pending_reason] => unilateral
  • [txn_type] => web_accept
  • [item_name] => Games Membership
  • [mc_currency] => USD
  • [item_number] => 12345
  • [residence_country] => GB
  • [test_ipn] => 1
  • [payment_gross] => 10.00
  • [shipping] => 0.00

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