为什么我们的 Nginx web 服务器上的子域不加载或不支持 PHP-MySQL 文件？

Question

When we do a

php -v

command, we see PHP installed on our Ubuntu 18.04 LTS system:

~# php -v
PHP 7.4.26 (cli) (built: Nov 22 2021 09:47:55) ( NTS )
Copyright (c) The PHP Group
Zend Engine v3.4.0, Copyright (c) Zend Technologies
    with Zend OPcache v7.4.26, Copyright (c), by Zend Technologies

Same for MySQL:

~# mysql -V
mysql  Ver 8.0.27 for Linux on x86_64 (MySQL Community Server - GPL).

The problem is when we run the "index.php" file from our "app.example.com/index.php" subdomain, it downloads through our web browser a file named "Download". This file is even considered a virus by the browser in question. Only HTML file works well with the same "app.example.com/index.html" subdomain. However when we check if php is well installed and even its version, this is confirmed but the subdomains do not take into account or do not load PHP-MySQL Codes at all.

We specify that we are under the " Nginx " Web Server.

So, why are we confronted with this problem which makes that the subdomain does not support PHP-MySQL and returns the download in the web browser of our files while PHP and MySQL are indeed installed on the hostname of the Nginx Web Server???

Thank you for helping us please.

Answer 1

If you use nginx you probably want to use php-fpm. This must of course be included in the corresponding nginx configuration (probably explicitly for each host that should be able to use PHP). Here is a guide that describes what I mean: https://www.howtoforge.com/tutorial/how-to-install-nginx-with-php-and-mysql-lemp-on-ubuntu-1804/#step-configure-nginx-and-phpfpm