Memcached - PHP 装配&使用

WBOY
Release: 2016-06-13 10:31:35
Original
994 people have browsed it

Memcached - PHP 安装&使用

下载Memcached:
http://danga.com/memcached/download.bml

安装:
下载安装libevent,已安装可跳过:
下载地址:http://www.monkey.org/~provos/libevent/

Memcached For PHP Module下载地址:
http://pecl.php.net/package/memcache
http://cn.php.net/manual/zh/ref.memcache.php

安装Memcached服务端

[email protected]:# tar vxzf memcached-1.1.12.tar.gz
[email protected]:# cd memcached-1.1.12
[email protected]:# ./configure --prefix=/usr/local/memcached
[email protected]:# make
[email protected]:# make install

安装完毕重启服务:

[email protected]:# cd /usr/local/memcached/bin
[email protected]:# ./memcached -d -m 50 -p 11211 -u root



安装PHP模块

[email protected]:# tar vxzf memcache-1.5.tgz
[email protected]:# cd memcache-1.5
[email protected]:# /usr/local/php/bin/phpize
[email protected]:# ./configure --enable-memcache --with-php-config=/usr/local/php/bin/php-config --with-zlib-dir
[email protected]:# make
[email protected]:# make install

安装完后可能会有如下提示:

Installing shared extensions: /usr/local/php/lib/php/extensions/no-debug-non-zts-20050922/

修改php.ini

extension_dir = "./"

修改为:

extension_dir = "/usr/local/php/lib/php/extensions/no-debug-non-zts-20050922/"

添加一行:

extension=memcache.so


安装完毕,测试:

PHP代码

? $memcache?=?new?Memcache;?//创建一个memcache对象?

? $memcache->connect('localhost',?11211)?or?die?("Could?not?connect");?//连接Memcached服务器

? $memcache->set('key',?'test');?//设置一个变量到内存中,名称是key?值是test?

? $get_value?=?$memcache->get('key');?//从内存中取出key的值??

? echo?$get_value;?

?>

Memcache的内定Function
connect(ip, port)
set(key, value)? 数据压缩:set(key, value,?MEMCACHE_COMPRESSED)
get(key)
increment, 同set(好像多了个计数功能,没试过)
getStats() 返回当前内存占用情况(return array) print_r($memcached->getStats());
flush? 清空内存占用.

代码范例(来自chinaunix):

PHP代码

//访问统计??

$memcache?=?new?Memcache;??

$memcache->connect(’localhost’,?11211)?or?die?("Could?not?connect");?

if($s=$memcache->get(’a’))?{??????$s=$s+1;??????$memcache->set(’a’,$s);??}?

else??$memcache->set(’a’,1);

?echo?’访问结果为:’.$s;??

?>?

等效PHP代码

$memcache?=?new?Memcache;?

$memcache->connect(’localhost’,?11211)?or?die?("Could?not?connect");???

if($s=$memcache->increment(’a’,1))?{??????echo?$s;??????}?

else??$memcache->set(’a’,1);

??>??

?数据压缩PHP代码

$memcache?=?new?Memcache;??

$memcache->connect(’localhost’,?11211)?or?die?("Could?not?connect");

?$test=(str_repeat(’jetwong’,100000));??$memcache->set(’b’,($test));?

?>

?使用压缩:??

?$memcache?=?new?Memcache;

?$memcache->connect(’localhost’,?11211)?or?die?("Could?not?connect");

?$test=(str_repeat(’jetwong’,100000));?

$memcache->set(’b’,($test),MEMCACHE_COMPRESSED);?

?>??

内存的更新清理PHP代码

?$memcache?=?new?Memcache;?

$memcache->connect(’localhost’,?11211)?or?die?("Could?not?connect");??

?/*设置值*/

?$status?=?$memcache->getStats();??

echo?’设置前内存使用情况’.$status[’bytes’].’
’;?

echo?’设置后’;??for($i=0;$i$i++)?{??????

?????? $memcache->set(’b’.$i,rand(1,99));?????????

?????? echo?’
’.
$i.’->’.$memcache->get(’b’.$i);

}

? /*查看设置的值*/??

$status?=?$memcache->getStats();

?echo?’delete前内存使用情况’.$status[’bytes’].’
’;??

echo?’
开始
delete’;??

for($i=0;$i$i++)?{????

? ? $memcache->delete(’b’.$i);??????

??? echo?’
’.
$i.’->’.$memcache->get(’b’.$i);??

}??

?/*查看flush使用的情况*/?

$status?=?$memcache->getStats();??

echo?’使用flush前内存使用情况’.$status[’bytes’].’
’;??

echo?’使用flush情况:’;?

for($i=0;$i$i++)?{??????

?? $memcache->set(’b’.$i,rand(1,99));??????????

?? echo?’
’.
$i.’->’.$memcache->get(’b’.$i);????

}??

$memcache->flush();?

echo?’flush之后:’;?

for($i=0;$i$i++)?{????????????

? echo?’
’.
$i.’->’.$memcache->get(’b’.$i);

}??

$status?=?$memcache->getStats();?

echo?’flush后内存使用情况’.$status[’bytes’].’
’;??

?>?

内存超量测试PHP代码

$memcache?=?new?Memcache;??

$memcache->connect(’localhost’,?11211)?or?die?("Could?not?connect");????//600K左右

?$test1=?str_repeat(’jetlee’,100000);??//600K左右??

$test2=?str_repeat(’jetlee’,100000);??//600K左右??

$test3=?str_repeat(’李连杰’,200000);??//600K左右?

$test4=?str_repeat(’连杰李’,100000);??//200K?

$test5=?file_get_contents(’http://img.pconline.com.cn/images/photoblog/2988177/20068/4/1154688770042_mthumb.JPG’);

$test6=?file_get_contents(’http://img.pconline.com.cn/images/photoblog/1767557/20069/28/1159417108902_mthumb.jpg’);???

for($i=1;$i$i++)?{?????

?? $j=’test’.$i;????

?? if($memcache->set($j,$$j))

?? {????????

? ? ? ? ? echo?$j.’->设置成功
’;??

?? ?????? $status?=?$memcache->getStats();

????????? echo?’内存:’.$status[’bytes’].’
’;

?? }else?{

????????? echo?$j.’->设置失败
’;

? ?? ???? }

? }?

?>

总结 PHP代码

? //设置篇

?if($data?=?$memcache->get(’k’,$v))?{?????

?? //显示我们的数据?????

}??else?{?

??? $data?=?get_from_database;?//得到数据源????

? ? if(!$memcache->set(’k’,$data),?MEMCACHE_COMPRESSED)?//开始设置???

? ? log();????//不成功,记录失败信息??????

}

?>?

Related labels:
source:php.cn
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Popular Tutorials
More>
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template
About us Disclaimer Sitemap
php.cn:Public welfare online PHP training,Help PHP learners grow quickly!