1.下载zookeeper：http://mirror.bit.edu.cn/apache/zookeeper/ 解压到usr/local下
2.复制配置文件：cp /usr/local/zookeeper/conf/zoo_sample.cfg /usr/local/zookeeper/conf/zoo.cfg
3.编译：进入目录——cd zookeeper-3.4.9/src/c
执行：./configure -prefix=/usr/local/zookeeper/zookeeper-3.4.9/
执行：make && make install
安装php zookeeper 扩展
1.下载扩展包：http://pecl.php.net/get/zookeeper-0.2.2.tgz 解压到usr/local
2.进入zookeeper目录里：cd zookeeper-0.2.2 (备注：里面有两层，进到最里层)
3.执行phpize （如果提示：phpize：Cannot find autoconf. Please check your autoconf installation and the $PHP_AUTOCONF 。则操作第四步否则跳过第四步）
4.安装autoconf:
curl -OL http://ftpmirror.gnu.org/autoconf/autoconf-latest.tar.gz
tar xzf autoconf-latest.tar.gz
cd autoconf-*
./configure --prefix=/usr/local
make
sudo make install
5.编译扩展（注意php-config 和zookeeper路径）：
./configure --with-php-config=/usr/local/php5/bin/php-config --with-libzookeeper-dir=/usr/local/zookeeper/zookeeper/
安装成功会输出：Installing shared extensions:模块目录
6.
三、配置php.ini
在最后添加：extension=zookeeper.so
phpinfo()查看扩展是否起效，若没有则修改php.ini中的extension_dir,配置为模块目录
