1）更新yum源
rpm -Uvh https://mirror.webtatic.com/yum/el6/latest.rpm
2）卸载原有的PHP
yum remove php* php-common
3）安装PHP7
yum install php70w
yum install php70w-gd php70w-mbstring php70w-mysql
4）查看php信息
php -v
PHP 7.0.10 (cli) (built: Aug 20 2016 08:13:48) ( NTS )
Copyright (c) 1997-2016 The PHP Group
Zend Engine v3.0.0, Copyright (c) 1998-2016 Zend Technologies
