Руководство по PHP
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# http_cache_etag

(PECL)

http_cache_etag -- Caching by ETag

## Описание

bool http_cache_etag ( [string etag] )

Attempts to cache the sent entity by its ETag, either supplied or generated by the hash algorithm specified by the INI setting `http.etag.mode`.

If the clients `If-None-Match` header matches the supplied/calculated ETag, the body is considered cached on the clients side and a `304 Not Modified` status code is issued.

A log entry is written to the cache log if the INI setting `http.log.cache` is set and the cache attempt was successful.

## Список параметров

`etag`

  Custom ETag

## Возвращаемые значения

Returns FALSE on failure, or exits with `304 Not Modified` if the entity is cached.

Пред. | Начало | След.
Функции протокола HTTP | Уровень выше | http_cache_last_modified