FinishResponseSubscriber::RESPONSE_HEADER_CACHE_ITEM_SEPARATOR

Separator between cache tags and cache context in respective debug headers.

When setting multiple response headers with the same name, the value for the header name is meant to be interpreted as the concatenation, comma-separated, of all the header values with that name. Since the headers here are meant to be used for debug only, the values are space-separated for legibility instead.

See also

https://www.rfc-editor.org/rfc/rfc9110.html#name-field-lines-and-combin…

File

core/lib/Drupal/Core/EventSubscriber/FinishResponseSubscriber.php, line 45

Class

FinishResponseSubscriber

Response subscriber to handle finished responses.

Namespace

Code

protected const RESPONSE_HEADER_CACHE_ITEM_SEPARATOR = ' ';