清理冲突的php：

yum -y remove php*

方法一：

rpm -Uvh https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm

rpm -Uvh https://mirror.webtatic.com/yum/el7/webtatic-release.rpm

方法二：

yum install epel-release -y 

rpm -Uvh https://mirror.webtatic.com/yum/el7/webtatic-release.rpm

安装php72w及其它相关扩展：

方法一（基本）：

yum -y install php72w php72w-cli php72w-fpm php72w-common php72w-devel

方法二（豪华版）：

yum -y install php72w php72w-cli php72w-fpm php72w-common php72w-devel php72w-embedded php72w-gd php72w-mbstring php72w-mysqlnd php72w-opcache php72w-pdo php72w-xml

php-fpm相关服务命令：

systemctl enable php-fpm.service

systemctl start php-fpm.service

systemctl stop php-fpm.service

systemctl restart php-fpm.service