How the PHP Middleware Pattern works and can easily be applied

• http-message

  17 6,899 2.4 PHP

  The purpose of this PSR is to provide a set of common interfaces for HTTP messages as described in RFC 7230 and RFC 7231

  

One of the most common places you'll find middleware being used is within a framework that transforms a Request object into a Response object. PSR-15: HTTP Server Request Handlers in the PHP Standard Recommendation (PSR), is a recommendation on how a (PSR-7) Request object should be handled and turned into a Response object. This recommendation also contains the Psr\Http\Server\MiddlewareInterface. This interface favors the use of a process method on a middleware class, but the principle is the same. It receives an input (the Request object), modifies it, and passes it along to RequestHandler which will trigger the next middleware or final action.

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