Overview:

The PayPal PHP Merchant SDK allows for integration with Express Checkout, Mass Pay, and Web Payments Pro APIs. In response to security mandates by the Payment Card Industry Council, PayPal is updating its services to require TLSv1.2 and HTTP/1.1 for all HTTPS connections. This includes a new 'tls' mode for testing TLSv1.2 connections and changes to the SDK core to handle TLS encryption and disable SSLv3 due to the Poodle vulnerability.

Features:

Integration with Express Checkout, Mass Pay, and Web Payments Pro APIs
TLSv1.2 and HTTP/1.1 Compliance for Enhanced Security
Ability to test TLSv1.2 connections with 'tls' mode
Updated SDK Core to handle TLS encryption and disable SSLv3
Support for configuration parameters like integration mode, API account credentials, and HTTP connection parameters
Dynamic configuration values can be set using a map or sdk_config.ini file
Multiple authentication methods for API calls
Includes Instant Payment Notification (IPN) feature

Summary:

The PayPal PHP Merchant SDK offers robust integration options for developers to work with Express Checkout, Mass Pay, and Web Payments Pro APIs. By complying with TLSv1.2 and HTTP/1.1 standards, the SDK enhances security for handling credit card information. With features like dynamic configuration, multiple authentication methods, and support for Instant Payment Notifications, developers can efficiently implement PayPal payment solutions.

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