http_cache_etag
(PECL pecl_http:0.1.0-1.5.5)
http_cache_etag — Caching by ETag
Description
bool http_cache_etag
([ string $etag
] )
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.
Note: This function may be used in conjunction with
http_send_data(), http_send_file() and http_send_stream().
If this function is used outside the http_send_*() API, it facilitates the ob_etaghandler().
Parameters
-
etag
-
custom ETag
Return Values
Returns FALSE or exits on success with 304 Not Modified if the entity is cached.
See the INI setting
http.force_exit for what "exits" means.
Examples
Example #1 A http_cache_etag() example
<?php
http_cache_etag();
http_send_data("data");
?>
Load balance : Server 01
