Integrating a secure and reliable payment gateway is essential for any e-commerce or SaaS application. Stripe is one of the most popular payment processors worldwide, offering a developer-friendly API, robust security with PCI compliance, and support for cards, wallets, and subscriptions. In this comprehensive tutorial, you will learn how to integrate Stripe Payment Gateway into a plain PHP application from scratch — including creating a checkout form, processing payments securely using Stripe PHP SDK, handling errors, and verifying payments. No framework required.
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