1、检查当前是否有安装phprpm -qa|grep php如果有安装PHP，那么请先删除这些安装包：yum remove php*
2、安装php源Centos 5 安装php源：rpm -ivh http://mirror.webtatic.com/yum/el5/latest.rpmCentOs 6 安装php源：rpm -ivh http://mirror.webtatic.com/yum/el6/latest.rpmCentOs 7 安装php源和epel扩展源：rpm -ivh https://mirror.webtatic.com/yum/el7/epel-release.rpm rpm -ivh https://mirror.webtatic.com/yum/el7/webtatic-release.rpm
3、现在开始安装php安装php5.5的基本安装包：yum install php55w php55w-gd php55w-mbstring php55w-mysql php55w-fpm安装php5.6的基本安装包：yum install php56w php55w-gd php56w-mbstring php56w-mysql php56w-fpm安装php7.0的基本安装包：yum install php70w php70w-gd php70w-mbstring php70w-mysql php70w-fpm安装完成php之后需要重启apache：service httpd restart
4、 测试网页我安装的php7.0，就拿php7.0写个网页测试一下vim /var/www/html/index.php <?php phpinfo(); ?>
