PSR-7

PSR-7 is a PHP Standards Recommendation that defines common interfaces for HTTP message representations, including requests, responses, and URIs. It provides a standardized way to handle HTTP communications in PHP applications, ensuring interoperability between different frameworks and libraries. By abstracting HTTP message handling, it allows developers to write more portable and framework-agnostic code.

Also known as: PSR7, PHP-FIG PSR-7, HTTP Message Interfaces, PSR 7, PHP Standard Recommendation 7

Why learn PSR-7?

Developers should learn PSR-7 when building or maintaining PHP applications that involve HTTP interactions, such as web APIs, middleware, or server-side rendering. It is essential for ensuring compatibility across modern PHP frameworks like Symfony, Laravel, and Slim, and for creating reusable components that can work in diverse environments. Use cases include implementing middleware layers, handling API requests/responses, and integrating third-party HTTP libraries.

Learning Resources

• docs: PHP-FIG PSR-7 Documentation
• tutorial: PHP The Right Way - HTTP Message Interface
• video: Laracasts: Understanding PSR-7
• docs: Packagist: psr/http-message