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
yum install php72w php72w-fpm php72w-cli php72w-common php72w-devel php72w-gd php72w-pdo php72w-mysql php72w-mbstring php72w-bcmath
yum 安装 PHP7
原文地址：http://blog.51cto.com/livestreaming/2092166