直接通过yum工具安装PHP，默认php7.2版本，依次执行下面命令**

    1. yum install  php
    2. yum install php-fpm php-mysqlnd php-pdo php-json php-mbstring php-gd  php-xml php-common
    3. systemctl start php-fpm.service //启动php
    4. systemctl enable php-fpm.service//设置开机自启动
    5. systemctl restart httpd //重新启动apache服务