http_cache_etag

(PECL pecl_http >= 0.1.0)

http_cache_etag — Caching by ETag

설명

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 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