在CentOS安裝PHP7.x。

1. 安装PHP7.x

1. 安装EPEL和Remi源¹：

$ sudo yum install https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
$ sudo yum install http://rpms.remirepo.net/enterprise/remi-release-7.rpm

2. 安装yum-utils并配置PHP7.x源：

$ sudo yum install yum-utils
$ sudo yum-config-manager --enable remi-php7x

3. 安装PHP7.x以及相关的扩展

$ sudo yum install php php-fpm php-common php-mysqlnd php-gd php-xml php-mbstring

4. 安装完成后启动PHP：

$ sudo systemctl start php-fpm.service
$ systemctl status php-fpm.service
● php-fpm.service - The PHP FastCGI Process Manager
   Loaded: loaded (/usr/lib/systemd/system/php-fpm.service; enabled; vendor preset: disabled)
   Active: active (running) since Mon 2020-06-08 21:06:55 EDT; 6min ago
 Main PID: 1327 (php-fpm)
   Status: "Processes active: 0, idle: 5, Requests: 0, slow: 0, Traffic: 0req/sec"
    Tasks: 6 (limit: 11344)
   Memory: 24.7M
   CGroup: /system.slice/php-fpm.service
           ├─1327 php-fpm: master process (/etc/php-fpm.conf)
           ├─1406 php-fpm: pool www
           ├─1407 php-fpm: pool www
           ├─1408 php-fpm: pool www
           ├─1411 php-fpm: pool www
           └─1415 php-fpm: pool www

2. 配置

1. 修改PHP-FPM配置文件/etc/opt/remi/php7x/php-fpm.d/www.conf：

; user = apache
; group = apache
user = nginx
group = nginx

• 根据使用的Web服务器，将默认的user和group从apache更改为nginx。如果不更改的话，apache运行的php-fpm不能对nginx的文件和文件夹写操作。

2. 验证并重启php-fpm：

$ php-fpm -t
$ sudo systemctl restart php-fpm.service

2.1 验证PHP安装：

1. 在Nginx html目录下创建info.php文件

$ sudo touch /usr/share/nginx/html/info.php

2. 文件中输入

<?php phpinfo(); ?>

3. 重启Nginx后，验证

$ curl -I localhost/info.php
HTTP/1.1 200 OK
Server: nginx/...
Date: Sat, 23 May 2020 03:07:19 GMT
Content-Type: text/html; charset=UTF-8
Connection: keep-alive
X-Powered-By: PHP/...

至此安装成功。