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http_cache_last_modified> <HTTP Funktionen
Last updated: Fri, 10 Oct 2008

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http_cache_etag

(PECL pecl_http:0.1.0-1.5.5)

http_cache_etagCaching by ETag

Beschreibung

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 Einstellungen 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 Einstellungen http.log.cache is set and the cache attempt was successful.

Hinweis: Diese Funktion kann zusammen mit http_send_data(), http_send_file() und http_send_stream() benutzt werden.

If this function is used outside the http_send_*() API, it facilitates the ob_etaghandler().

Parameter-Liste

etag

custom ETag

Rückgabewerte

Liefert FALSE oder beendet bei Erfolg with 304 Not Modified if the entity is cached. INI Einstellungen beschreibt was "beendet" in diesem Zusammenhang bedeutet.

Beispiele

Beispiel #1 A http_cache_etag() example

<?php
http_cache_etag
();
http_send_data("data");
?>

Siehe auch



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http_cache_last_modified> <HTTP Funktionen
Last updated: Fri, 10 Oct 2008
 
 
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