<亲测>CentOS7yum安装PHP7.2

1. 如果之前已经安装我们先卸载一下

   yum -y remove php*

2. 由于linux的yum源不存在php7.x，所以我们要更改yum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

3. yum查询安装php72w
   yum search php72w

4. yum 安装php72w和各种拓展，选自己需要的即可

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