1.memcache服务器的安装
.分别把memcached和libevent下载回来，放到 /tmp 目录下：
# cd /tmp
# wget http://www.danga.com/memcached/dist/memcached-1.2.0.tar.gz
# wget http://www.monkey.org/~provos/libevent-1.2.tar.gz .先安装libevent：
# tar zxvf libevent-1.2.tar.gz
# cd libevent-1.2
# ./configure --prefix=/usr
# make
# make install .测试libevent是否安装成功：
# ls -al /usr/lib | grep libevent
lrwxrwxrwx root root ?? : libevent-1.2.so. -> libevent-1.2.so.1.0.
-rwxr-xr-x root root ?? : libevent-1.2.so.1.0.
-rw-r--r-- root root ?? : libevent.a
-rwxr-xr-x root root ?? : libevent.la
lrwxrwxrwx root root ?? : libevent.so -> libevent-1.2.so.1.0.
还不错，都安装上了。 .安装memcached，同时需要安装中指定libevent的安装位置：
# cd /tmp
# tar zxvf memcached-1.2..tar.gz
# cd memcached-1.2.
# ./configure --with-libevent=/usr
# make
# make install
如果中间出现报错，请仔细检查错误信息，按照错误信息来配置或者增加相应的库或者路径。
安装完成后会把memcached放到 /usr/local/bin/memcached ， .测试是否成功安装memcached：
# ls -al /usr/local/bin/mem*
-rwxr-xr-x root root ?? : /usr/local/bin/memcached
-rwxr-xr-x root root ?? : /usr/local/bin/memcached-debug
2.扩展的安装
下载地址：https://github.com/websupport-sk/pecl-memcache/archive/php7.zip
安装：
tar vxzf memcache-2.2..tgz
cd memcache-2.2.
/usr/local/php/bin/phpize
./configure --enable-memcache --with-php-config=/usr/local/php/bin/php-config --with-zlib-dir
make
make install
安装成功，会有如下提示：
Installing shared extensions: /usr/local/php/lib/php/extensions/no-debug-non-zts-2007xxxx/
3.修改php.ini
extension_dir = "/usr/local/php/lib/php/extensions/no-debug-non-zts-2007xxxx/"
extension=memcache.so