hello agian this classes is an attempt to simply the process of integrating Website Payments Pro into an PHP web application first class PHPpaypal 0.5.2 phpPayPal is an attempt to simply the process of integrating Website Payments Pro into an PHP web application. It is a single class developed for PHP5 to integrate Website Payments Pro using the Name-Value Pair API from PayPal. Current Features: DoDirectPayment SetExpressCheckout GetExpressCheckoutDetails DoExpressCheckoutPayment GetTransactionDetails RefundTransaction Planned Features: DoAuthorization DoCapture DoReauthorization DoVoid TransactionSearch SetCustomerBillingAgreement GetBillingAgreementCustomerDetails CreateRecurringPaymentsProfile DoReferenceTransaction download as zip file phpPayPal.0.5.2.zip [14.94 KB] for browse the class phpPayPal.0.5.2.php [64.18 KB] and the php exampless SetExpressCheckout-Examples.php [844 B] DoDirectPayment-Examples.php [1.52 KB] the second class PayPal Checkout Class 1.0 Implementation of simple Paypal Express Checkout in PHP. PayPal allows their users to implement checkout functions using their API. But implementing the full API is not a piece of cake. There are some libraries on the web, but the most of them are paid, closed or too complex. If you wanna implement simple and single-item payments (i.e. "pay for service" or "pay for source code"), you can use my, free and open, library described here. This library was written as a part of my framework, but it's usable standalone too, I hope. Using is as easy as $r = new PayPal(); $r->doExpressCheckout(10, 'Da Greatest Library You Ever Seen'); PHP: $final = $r->doPayment(); if ($final['ACK'] == 'Success') { echo 'Succeed!'; } else { echo 'Error!';} PHP: download PayPal-Checkout-1.0.zip [6.16 KB]