The Authorize.Net PHP SDK lets developers integrate their PHP websites or applications with the Authorize.Net API. The SDK enables them to authorize payments on their PHP applications using Authorize.Net services.
Celery, flexible ecommerce solution provider, allows users to accept pre-orders without charging the customer until the product is ready to ship. On the flip side, customers also have the capability to pre-pay for goods and services. In addition to flexible payment options, Celery allows developers to integrate its functionality with third party apps and workflows via the Celery API.