title HTTP Back to index HTTP Client / Server interaction HTTP Protocol - wikibooks.org HTTP Semantics - rfc-editor.org Hypertext Transfer Protocol - wikipedia.org Status codes Know Your HTTP Status Codes Well - github.com HTTP request Request - w3.org Method Definitions - w3.org HTTP response Response - w3.org HTTP methods Method Definitions - w3.org Cookies HTTP cookie - wikipedia.org Setting Cookies - symfony.com Caching See HTTP Caching Content negotiation Content negotiation - developer.mozilla.org Language detection Accept-Language used for locale setting - w3.org Accept-Language - w3.org New in Symfony 5.4: Language Negotiation Symfony HttpClient component HttpClient - symfony.com