PayPal API Integration Tutorial - PayPal payment gateway integration in PHP with Sandbox and IPN. Example script to integrate PayPal. The Payment Card Industry (PCI) Council has mandated that early versions of TLS be retired from service. All organizations that handle credit. PHP SDK for PayPal RESTful APIs. Contribute to PayPal - PHP -SDK development by creating an account on GitHub. Sample · Installation · Wiki · Making First Call. Works like a dream and is very easy to modify and understand. Manjula June 26, at 7: Submit paid service request. I was able to set it up and customize it in less than an hour. Thanks for this great article, I am working on a php project where i need to integrate paypal.