{"id":649,"date":"2023-06-26T08:09:15","date_gmt":"2023-06-26T08:09:15","guid":{"rendered":"https:\/\/blog.hostinger.io\/support\/2023\/06\/26\/8052370-advanced-cdn-header-management-at-hostinger\/"},"modified":"2026-03-16T12:12:02","modified_gmt":"2026-03-16T12:12:02","slug":"8052370-advanced-cdn-header-management-at-hostinger","status":"publish","type":"post","link":"https:\/\/www.hostinger.com\/support\/8052370-advanced-cdn-header-management-at-hostinger\/","title":{"rendered":"Advanced CDN Header Management at Hostinger"},"content":{"rendered":"

A Cache-Control<\/code> header is an HTTP header field that allows the server to specify caching directives for the client (such as a web browser) and intermediate caches (such as proxy servers). It controls how the client and caches should store and reuse the response to subsequent requests. It also provides a way to control various aspects of caching, including caching lifespan, cache validation, and cache revalidation.<\/p>

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Learn more: Mozilla Cache-Control documentation<\/a> 💡 <\/b><\/p>\n<\/div>

If multiple directives<\/b> are passed together, each directive is separated by a comma<\/b> ( , ). If the directive takes an argument<\/b>, it follows the directive separated by an equal sign<\/b> ( = <\/b>), e.g., max-age=86400<\/code>.<\/p>

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Cache-Control<\/code> headers can be customized in the .htaccess<\/a><\/b> file or via PHP code<\/a><\/b>.<\/p>

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Types of Directives<\/h2>

Directives can be broken down into four groups<\/b>: cacheability, expiration, revalidation, and others.<\/p>

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Cacheability<\/h3>

It refers to whether or not a resource should enter a cache<\/b>, and the directives below indicate a resource’s cacheability:<\/p>