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Kévin Dunglas: Using PSR-7 in Symfony

Kévin Dunglas: Using PSR-7 in Symfony

With the recent acceptance of the PSR-7 HTTP standard by the PHP-FIG, there’s been a lot of articles about using it in various PHP frameworks. In this new post Kevin Douglas looks at the use of it in Symfony, how it relates to the HttpFoundation component and when it will be included in the framework itself.

Back in 2011, Symfony 2 introduced the HttpFoundation component, a PHP library representing HTTP messages with an object oriented API. HttpFoundation is a key in the success of the HTTP-centric approach of Symfony, and it definitely inspirited the PSR-7 specification. However, PSR-7 and HttpFoundation differ fundamentally in two aspects: PSR-7 messages are immutable, mutability is in the DNA of HttpFoundation and in PSR-7, almost everything is stream.

Because of immutability it is very hard to make HttpFoundation embracing PSR-7 without a huge backward compatibility break impacting thousands of existing applications and bundles.

Work was almost immediately started to support the PSR-7 specification in Symfony, however. As a result support will be ready to be included in Symfony 2.7 but, as the rest of the post shows, it can be introduced in versions 2.3 or greater through a “HTTP message bridge” library. He shows how to get this installed in your Symfony application instance and how to use it in your controllers to interact with Requests and Responses. He does point out, though, that while this can bring your release up to PSR-7 status it comes with some overhead that may not be worth it if you’re concerned about performance.

Link: http://dunglas.fr/2015/06/using-psr-7-in-symfony/
Source: http://www.phpdeveloper.org/news/22865

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Posted Czerwiec 26th, 2015 in WEB and PHP Development.

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