swoole 有点类似node.js  ,  swoole纯c编写的php扩展. 多进程和非阻塞
安装php : 
先卸载: 
# yum remove php  php-bcmath php-cli php-common  php-devel php-fpm    php-gd php-imap  php-ldap php-mbstring php-mcrypt php-mysql   php-odbc   php-pdo   php-pear  php-pecl-igbinary  php-xml php-xmlrpc
源 
# rpm -uvh http://mirror.webtatic.com/yum/el6/latest.rpm
安装php5.5 
yum install php55w  php55w-bcmath php55w-cli php55w-common  php55w-devel php55w-fpm    php55w-gd php55w-imap  php55w-ldap php55w-mbstring php55w-mcrypt php55w-mysql   php55w-odbc   php55w-pdo   php55w-pear  php55w-pecl-igbinary  php55w-xml php55w-xmlrpc php55w-opcache php55w-intl php55w-pecl-memcache
php5.5 默认带有pdo,不需要先安装 mysql
php.ini修改 
date.timezone = 'asia/shanghai'
注意卸载: 
yum remove httpd
安装swoole: 
https://github.com/swoole/swoole-src/releases
# wget https://github.com/swoole/swoole-src/archive/swoole-1.7.6-stable.tar.gz 
tar zxvf swoole-1.7.6-stable.tar.gz 
swoole-1.7.6-stable.tar.gz 
phpize 
./configure 
make 
make install
下面扩展加入到php.ini 
extension=swoole.so