HttpResponse::setCacheControl

Set cache control ()
bool HttpResponse::setCacheControl ( string control [, int max_age = 0 [, bool must_revalidate = TRUE]] )

Define a custom Cache-Control header, usually being private or public;

control: the primary cache control setting
max_age: the max-age in seconds, suggesting how long the cache entry is valid on the client side
must_revalidate: whether the cached entity should be revalidated by the client for every request

Returns TRUE on success, or FALSE if control does not match one of public, private or no-cache.

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