memcached扩展是基于libmemcached，所以要先安装libmemcached

一、下载软件

1、libmemcached下载地址：https://launchpad.net/libmemcached/+download

（

1. wget http://launchpad.net/libmemcached/1.0/1.0.18/+download/libmemcached-1.0.2.tar.gz  
2. tar -zxvf libmemcached-1.0.18.tar.gz

）

文件：libmemcached-1.0.18.tar.gz 

2、php-memcached下载地址：http://pecl.php.net/package/memcached

文件：memcached-2.2.0.tgz

 

二、安装libmemcached

[root@vm15 local]# mkdir -p libmemcached

[root@vm15 local]# tar zxvf libmemcached-1.0.18.tar.gz  [root@vm15 local]# cd libmemcached-1.0.18 [root@vm15 libmemcached-1.0.18]# ./configure --prefix=/usr/local/libmemcached --with-memcached [root@vm15 libmemcached-1.0.18]# make [root@vm15 libmemcached-1.0.18]# make install

 

三、安装php-memcached

[root@vm15 local]# mkdir -p phpmemcached 

[root@vm15 local]# tar zxvf memcached-2.2.0.tgz [root@vm15 local]# cd memcached-2.2.0 [root@vm15 memcached-2.2.0]# /usr/local/php/bin/phpize（phpize是预编译命令） Configuring for: PHP Api Version: 20131106 Zend Module Api No: 20131226 Zend Extension Api No: 220131226 [root@vm15 memcached-2.2.0]# ./configure --enable-memcached --with-php-config=/usr/local/php/bin/php-config --with-libmemcached-dir=/usr/local/libmemcached --disable-memcached 

-sasl [root@vm15 memcached-2.2.0]# make [root@vm15 memcached-2.2.0]# make install Installing shared extensions: /usr/local/php/lib/php/extensions/no-debug-zts-20131226/ [root@vm15 memcached-2.2.0]# ll /usr/local/php/lib/php/extensions/no-debug-zts-20131226/

total 2140

-rwxr-xr-x. 1 root root 325608 Dec 30 15:59 memcached.so -rwxr-xr-x. 1 root root 453766 Dec 30 17:44 memcache.so -rwxr-xr-x. 1 root root 540834 Dec 19 15:38 opcache.so -rwxr-xr-x. 1 root root 861055 Dec 30 16:47 redis.so

[root@vm15 memcached-2.2.0]# vi + /usr/local/php/lib/php.ini

加上extension=memcached.so [root@vm15 memcached-2.2.0]# /usr/local/apache2/bin/apachectl restart 查看phpinfo可以看到支持了

 

四、安装遇到的问题

1、安装libmemcached过程中不要忘了，--with-memcached，不然会提示你

checking for memcached... no

configure: error: "could not find memcached binary"

2、你的memcached是不是1.2.4以上的，如果不是会提示你

clients/ms_thread.o: In function `ms_setup_thread':

/home/zhangy/libmemcached-0.42/clients/ms_thread.c:225: undefined reference to `__sync_fetch_and_add_4' clients/ms_thread.o:/home/zhangy/libmemcached-0.42/clients/ms_thread.c:196: more undefined references to `__sync_fetch_and_add_4' follow collect2: ld returned 1 exit status make[2]: *** [clients/memslap] Error 1 make[2]: Leaving directory `/home/zhangy/libmemcached-0.42'

解决办法是--disable-64bit CFLAGS="-O3 -march=i686"，如果不用这个64位的long型数据，我想php扩展memcached，memcache也就没什么区别了，装memcached也就没什么意思了。