Memcache module provides handy procedural and object oriented interface
to memcached, highly effective caching daemon, which was especially
designed to decrease database load in dynamic web applications.
This module doesn't have native support of multiple servers, but you
still can implement it yourself in your application. Establish several
memcached connections, set priority level for each server etc.
More information about memcached can be found at http://www.danga.com/memcached/.
This module uses functions of zlib
to support on-the-fly data compression. Zlib is required to install
this module.
PHP 4.3.3 or newer is required to use the memcache extension.
本 PECL 扩展未绑定于 PHP 中。
进一步信息例如新版本,下载,源程序,维护者信息以及更新日志可以在此找到:
http://pecl.php.net/package/memcache.
In order to use these functions you must compile PHP with MemCache support
by using the --with-memcache[=DIR] option.
Windows users will enable php_memcache.dll inside
of php.ini in order to use these functions.
可以从 PHP
下载页面或者 http://snaps.php.net/
下载此 PECL 扩展的
DLL 文件。
表格 1. MemCache Constants
Name | Description |
---|
MEMCACHE_COMPRESSED
(integer)
|
Used to turn on-the-fly data compression on with
Memcache::set(),
Memcache::add() 和
Memcache::replace().
|
本扩展模块在 php.ini 中未定义任何设置指令。
There is only one resource type used in memcache module - it's
the link identifier for a cache server connection.
例子 1. memcache extension overview example
<?php
$memcache = new Memcache;
$memcache->connect('localhost', 11211) or die ("Could not connect");
$version = $memcache->getVersion();
echo "Server's version: ".$version."<br/>\n";
$tmp_object = new stdClass;
$tmp_object->str_attr = 'test';
$tmp_object->int_attr = 123;
$memcache->set('key', $tmp_object, false, 10) or die ("Failed to save data at the server");
echo "Store data in the cache (data will expire in 10 seconds)<br/>\n";
$get_result = $memcache->get('key');
echo "Data from the cache:<br/>\n";
var_dump($get_result);
?>
|
|
In the above example, an object is being saved in the cache and then
retrieved back. Object and other non-scalar types are serialized before
saving, so it's impossible to store resources (i.e. connection identifiers
and others) in the cache.