a使用webstatic源，官方文档 https://webtatic.com/packages/php70/
查看版本号
lsb_release -a
添加源
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
安装
yum install php70w
问题
1 缺少gmp Processing Dependency: libgmp.so.3()(64bit)
解决方案
下载 compat-libgmp-4.3.1-1.sl7.x86_64.rpm
安装rpm
rpm -ivh gmp-4.3.1-7.el6_2.2.x86_64.rpm
2. 安装依赖缺失 Requires: httpd-mmn = 20051115
解决方案 清理yum
yum clean all
