HTTP Funkcje
PHP Manual

http_cache_last_modified

(PECL pecl_http >= 0.1.0)

http_cache_last_modifiedCaching by last modification

Opis

bool http_cache_last_modified ([ int $timestamp_or_expires ] )

Attempts to cache the sent entity by its last modification date.

If the supplied argument is greater than 0, it is handled as timestamp and will be sent as date of last modification. If it is 0 or omitted, the current time will be sent as Last-Modified date. If it's negative, it is handled as expiration time in seconds, which means that if the requested last modification date is not between the calculated timespan, the Last-Modified header is updated and the actual body will be sent.

A log entry will be written to the cache log if the ustawienia INI http.log.cache is set and the cache attempt was successful.

Informacja: Ta funkcja może być użyta w powiązaniu z http_send_data(), http_send_file() i http_send_stream().

Parametry

timestamp_or_expires

Unix timestamp

Zwracane wartości

Zwraca FALSE lub exist w przypadku sukcesu with 304 Not Modified if the entity is cached. Patrz ustawienia INI http.force_exit co znaczą "exist".

Przykłady

Przykład #1 A http_cache_last_modified() example

Caching for 5 seconds.

<?php
http_cache_last_modified
(-5);
printf("%s\n"http_date());
?>

Zobacz też:


HTTP Funkcje
PHP Manual