PHP-FIG — PHP Framework Interop Group - PHP-FIG Overview & Contact Data

PHP-FIG is the PHP Framework Interop Group, a working community of established PHP projects that coordinates shared technical standards for the language. The organization reviews proposals through a public RFC process and publishes PHP Standards Recommendations, giving developers a common vocabulary for building frameworks, libraries, and applications. Its standards cover areas such as coding style, autoloading PHP classes, event dispatching, logging, HTTP clients, and middleware, helping teams reduce duplication and improve compatibility across the ecosystem. The group’s work is visible in widely used packages, libraries, and framework components that rely on shared contracts rather than vendor-specific assumptions. The site documents the group’s standards, explains the revision process, and provides references for developers who need to understand how a given interface or namespace is expected to behave. A key focus is HTTP interoperability, where the PSR-7 specification defines core message types such as ServerRequestInterface and RequestInterface. The interface RequestInterface extends MessageInterface, while related HTTP client and middleware standards build on those foundations to support predictable request handling in any PHP framework. This makes PHP-FIG especially useful for framework maintainers, application developers, and contributors to open-source PHP projects. By following the published recommendations, developers can write code that is more portable, easier to maintain, and more likely to work with third-party packages. The site also helps teams understand how to use PHP use statements, PHP namespace conventions, and standard interfaces in a consistent way, reducing friction when integrating components from different vendors. For anyone comparing PHP framework options or contributing to a library, PHP-FIG provides a practical reference for the standards that shape modern PHP development.