PayPal Payment Gateway Integration – PHP is a lightweight payment integration script designed to add PayPal checkout functionality to PHP websites and applications.

The script uses the PayPal REST API v2 and supports both Sandbox and Live modes, allowing developers to test payment flows before switching to live transactions.

The integration follows a straightforward checkout flow: users select PayPal as their payment method, continue to PayPal to approve the payment, return to the website, and complete the payment capture process.

Designed without requiring a PHP framework, the script is suitable for custom PHP websites, SaaS projects, digital product payments and administrative applications.

Setup involves uploading the files, following the included Instructions.docx, configuring the PayPal Client ID and Secret, selecting the operating mode, updating return URLs and testing the integration with payment_example.php.

Developers can use the provided integration as a starting point for adding PayPal payments to their own PHP projects.

• PayPal REST API v2 integration

• Supports Sandbox mode for payment testing

• Supports Live mode for real transactions

• PayPal checkout and approval flow

• Return to the website after payment approval

• Payment capture flow

• Lightweight PHP implementation

• No PHP framework required

• Customizable code for different website projects

• Suitable for custom PHP websites

• Suitable for SaaS applications

• Suitable for digital product payment workflows

• Configuration using PayPal Client ID and Secret

• Configurable return URLs

• Includes payment_example.php for testing

• Includes Instructions.docx setup documentation

• Compatible with Apache and Nginx environments

• PHP 7.1 or higher

• PHP cURL extension enabled

• Apache or Nginx web server

• SSL certificate recommended

• PayPal developer account and API credentials

• PayPal Client ID and Secret

• Configured return URLs

• Instructions.docx for setup guidance