http_cache_etag
(PECL pecl_http >= 0.1.0)
http_cache_etag — Caching by ETag
설명
$etag
] )Attempts to cache the sent entity by its ETag, either supplied or generated by the hash algorithm specified by the INI 설정 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 설정 http.log.cache is set and the cache attempt was successful.
Note: 이 함수는 다음 함수와 함께 사용할 수 있습니다: http_send_data(), http_seld_file() 그리고 http_send_stream().
If this function is used outside the http_send_*() API, it facilitates the ob_etaghandler().
인수
-
etag -
custom ETag
반환값
성공시 FALSE를 반환하거나
종료합니다. with 304 Not Modified if the entity is cached.
"exits"의 의미에 대해서
INI
설정 http.force_exit를
참고하십시오.
예제
Example #1 A http_cache_etag() example
<?php
http_cache_etag();
http_send_data("data");
?>
참고
- http_cache_last_modified() - Caching by last modification
- ob_etaghandler() - ETag output handler
- http_match_etag() - Match ETag
- PHP 5.1.0 이상을 사용할 때 HttpResponse 클래스
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