卸载之前php

yum -y remove php*

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

yum安装php72w和扩展，根据需要自己选

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 

指定版本号安装例如：7.2.24

先列出php的版本号：

yum list php* --showduplicates | sort -r |grep  php72w

指定版本号安装：

 yum -y install php72w-7.2.24-1.w7 php72w-cli-7.2.24-1.w7 php72w-common-7.2.24-1.w7 php72w-devel-7.2.24-1.w7 php72w-embedded-7.2.24-1.w7 php72w-fpm-7.2.24-1.w7 php72w-gd-7.2.24-1.w7 php72w-mbstring-7.2.24-1.w7 php72w-mysqlnd-7.2.24-1.w7 php72w-opcache-7.2.24-1.w7 php72w-pdo-7.2.24-1.w7 php72w-xml-7.2.24-1.w7 

查看php版本号：

[root@VM_0_9_centos ~]# php -v
PHP 7.2.24 (cli) (built: Oct 26 2019 12:28:19) ( NTS )
Copyright (c) 1997-2018 The PHP Group
Zend Engine v3.2.0, Copyright (c) 1998-2018 Zend Technologies启动

启动php：

systemctl start php-fpm.service 

nginx配置php：

 [root@VM_0_9_centos vhost]# vim love.conf
   server {
        listen       80;
        server_name  love.wyasw.com;
        root /home/deploy/nginx/html/love/;
        index index.html index.htm index.php;
        
        
        location / { 
                root /home/deploy/nginx/html/greenleaf/backend/web/;
                #try_files $uri $uri/ /index.php;
                try_files $uri $uri/ /index.php?$args;
        }
        location ~ .*\.(php|php5)?$  {
                #fastcgi_pass unix:/dev/shm/php-cgi.sock;
                fastcgi_pass 127.0.0.1:9000;
                fastcgi_index index.php;
                include fastcgi.conf;
                }
        
        location ~ .*\.(gif|jpg|jpeg|png|bmp|swf|flv|ico)$ {
                expires 30d;
                }
        
        location ~ .*\.(js|css)?$ {
                expires 7d;
                }

    }

插入php info页面

[root@VM_0_9_centos love]# cd /home/deploy/nginx/html/love
[root@VM_0_9_centos love]# cat info.php 
<?php
phpinfo();

打开info页面即可查看php版本信息，及配置文件等信息，证明安装成功