There are 2 repositories under paypal-php-sdk topic.
PHP SDK for PayPal's Checkout REST API
A simple donation system that supports many payment methods and various games such as Garry's Mod, SourceMod-compatibles and Minecraft.
Integrate Paypal payment gateway with Paypal integration PHP kit. You can easily integrate standard paypal payment gateway payment with this PHP kit.
New format to make payments with PayPal-PHP-SDK and Webhooks in Laravel 5.8
The paypal payment management system is created to receiving online payment . You can receive payment with a form . You can create desired payment amount link and receive payment online using Paypal payment gateway.
Learn Paypal(restful api,webform ipn)
A simple website with payment gateway is integration using PayPal’s Braintree SDK .
The transaction reference obtained from the purchase() response can't be used to refund a purchase. The transaction reference from the completePurchase() response is the one that should be used.
Paypal Server is a self-hosted, open-source Paypal payment processor. It's secure, private, censorship-resistant and free.
PayPal payment gateway integration made easier. A PHP SDK for Omnipay PayPal library, use it for easier payment gateway integration with your PHP project.
New format to make payments with PayPal-PHP-SDK and Webhooks in Laravel 5.8