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Old 02-04-2008
File cache class 2008.02.03 (Default branch)
File cache class is a PHP Class that can cache arbitrary data in files in order to reduce the time necessary to regenerate pages or other types of data that do not change every time they are requested. It features safe locking of cache files to avoid data corruption caused by simultaneous accesses during cache file updates, portable locking schemes, and the ability to set a cache expiry date or timeout period. Cache files can store user-defined headers besides the cached data, and also standard headers used in HTTP like content-length:, date:, expires:, etag:, etc. It has been tested under Linux, SunOS and Windows. License: Freely Distributable Changes:
This release fixes a bug that was preventing the reading of cache file headers longer than the default file buffering length limit.Image

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LEARN ABOUT PHP

http_cache_last_modified

HTTP_CACHE_LAST_MODIFIED(3)						 1					       HTTP_CACHE_LAST_MODIFIED(3)

http_cache_last_modified - Caching by last modification

SYNOPSIS

       bool http_cache_last_modified ([int  $timestamp_or_expires])

DESCRIPTION

	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 omit-
       ted, 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 INI settinghttp.log.cache is set and the cache attempt was successful.

       Note

	      This function may be used in conjunction with http_send_data(3), http_send_file(3) and http_send_stream(3).

PARAMETERS

	      o $timestamp_or_expires
		- Unix timestamp

RETURN VALUES

	Returns FALSE or exits on success with 304 Not Modified if the entity is cached. See  the  INI	settinghttp.force_exit	for  what  "exits"
       means.

EXAMPLES

       Example #1

	      A http_cache_last_modified(3) example

	       Caching for 5 seconds.

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

SEE ALSO

       http_cache_etag(3), the HttpResponse class if you are using PHP 5.1.0 and above.

PHP Documentation Group 											       HTTP_CACHE_LAST_MODIFIED(3)