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.
Это расширение PECL
не поставляется вместе с PHP.
Дополнительная информация, такая как новый версии,
скачивание, исходные файлы, информация о разработчике и CHANGELOG, могут
быть найдены здесь:
http://pecl.php.net/package/memcache.
In order to use these functions you must compile PHP with Memcache support
by using the --enable-memcache[=DIR] option.
Windows users will enable php_memcache.dll inside
of php.ini in order to use these functions.
Вы можете скачать DLL этого
расширения PECL со страницы
PHP Downloads или
http://snaps.php.net/.
Таблица 1. MemCache Constants
| Name | Description |
|---|
|
MEMCACHE_COMPRESSED
(integer)
|
Used to turn on-the-fly data compression on with
Memcache::set(),
Memcache::add() и
Memcache::replace().
|
Данное расширение не определяет никакие директивы конфигурации в php.ini.
There is only one resource type used in memcache module - it's
the link identifier for a cache server connection.
Пример 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.