先用yum安装httpd Apache：yum install httpd
然后安装mysql： 更新源
wget http://dev.mysql.com/get/Downloads/MySQL-5.5/MySQL-server-5.5.48-1.el6.x86_64.rpm
wget http://dev.mysql.com/get/Downloads/MySQL-5.5/MySQL-client-5.5.48-1.el6.x86_64.rpm
wget http://dev.mysql.com/get/Downloads/MySQL-5.5/MySQL-devel-5.5.48-1.el6.x86_64.rpm
rpm -ivh MySQL-server-5.5.48-1.el6.x86_64.rpm
rpm -ivh MySQL-client-5.5.48-1.el6.x86_64.rpm
rpm -ivh MySQL-devel-5.5.48-1.el6.x86_64.rpm
如果安装不成功mysql和自带的mysql5.1冲突 卸载mysql5.1 yum -y remove mysql-libs-5.1*
重新安装mysql rpm -ivh MySQL-server-5.5.48-1.el6.x86_64.rpm
启动mysql service mysql start
最后安装php环境：
1.查询是否安装有php rpm -qa|grep php
2.更新源
rpm -Uvh https://dl.fedoraproject.org/pub/epel/epel-release-latest-6.noarch.rpm
rpm -Uvh https://mirror.webtatic.com/yum/el6/latest.rpm
3.查看php版本列表 yum list php*
4.安装php及相关软件（相关扩展）
yum install php55w.x86_64 php55w-fpm.x86_64 php55w-mysql.x86_64 php55w-gd.x86_64 libjpeg* php55w-ldap.x86_64 php55w-odbc.x86_64 php55w-pear.noarch php55w-xml.x86_64 php55w-xmlrpc.x86_64 php55w-mbstring.x86_64 php55w-bcmath.x86_64 php-mhash
如果安装mysql扩展又冲突那是因为依赖包版本过低 下载高版本依赖包 然后重新安装mysql wget http://dev.mysql.com/get/Downloads/MySQL-5.6/MySQL-shared-compat-5.6.14-1.el6.x86_64.rpm
rpm -ivh MySQL-shared-compat-5.6.14-1.el6.x86_64.rpm
最后重新安装php-mysql扩展 yum install php-mysql
安装mysql教程：https://blog.csdn.net/keyunq/article/details/51076807
安装php教程：https://blog.csdn.net/leejianjun/article/details/52200909
解决php-mysql扩展冲突问题：https://www.cnblogs.com/caryfang/p/5439299.html
