Omnipay is a PHP processing library that supports 26 reputable payment gateways, including PayPal and Stripe. This article shows you Omnipay's capabilities by verifying a customer's credit card information and then uses the SDK for making a payment through a Stripe payment gateway.
Square continued its move beyond payments into ecommerce in general by announcing its Orders API. The Orders API allows developers to build solutions that allow customers to place orders online, in-person, and in-app. Orders can be sent to other Square products or centralized POS systems.