一、yum安装PHP
1.检查当前安装的PHP包
https://www.cnblogs.com/phpdragon/p/14710830.html
二、解决Centos系统下httpd无法解析php的问题
在apache的配置文件（/etc/httpd/conf/httpd.conf）中添加以下代码:
AddType application/x-httpd-php .php
AddType application/x-httpd-php .html
AddType application/x-httpd-php .htm
原文链接：https://blog.csdn.net/steadyhzc/article/details/115912744
三、然后重启httpd服务即可解析php
systemctl restart httpd