How to Install PHP 8.2 for Nginx on Debian 12

PHP is a popular server-side scripting language that is widely used for web development. It stands for "PHP: Hypertext Preprocessor" and was originally created by Rasmus Lerdorf in 1994. PHP is designed to be embedded within HTML code, allowing developers to dynamically generate web content.

To install PHP 8.2 for Nginx on Debian 12, you can follow these steps:

Step 1 : Import the GPG key for the repository:

sudo wget -O /etc/apt/trusted.gpg.d/php.gpg https://packages.sury.org/php/apt.gpg

Step 2 : Add the repository to your system's sources:

echo "deb https://packages.sury.org/php/ $(lsb_release -sc) main" | sudo tee /etc/apt/sources.list.d/php.list

Step 3 : Update the package lists to include the new repository:

sudo apt update

Step 4 : Install PHP 8.2:

sudo apt install php8.2

Step 5 : Install the requested extensions

sudo apt-get install -y php8.2-{fpm,cgi,mysql,curl,xsl,gd,common,xml,zip,xsl,soap,bcmath,mbstring,gettext,imagick}

Step 6 : Configure Nginx to use PHP-FPM:

sudo nano /etc/nginx/sites-available/default

Find the location ~ \.php$ block and modify it as follows:

location ~ \.php$ {
    include snippets/fastcgi-php.conf;
    fastcgi_pass unix:/var/run/php/php8.2-fpm.sock;
}

Save and exit the file.

Step 7 : Restart Nginx to apply the changes:

sudo systemctl restart nginx

Step 8 : To test if PHP-FPM is working correctly, you can create a PHP info file. Create a file called info.php in the web root directory (/var/www/html/) with the following content:

sudo nano /var/www/html/info.php

Add the following lines to the file:

<?php
phpinfo();
?>

Save and exit the file.

Step 9 : Now, open a web browser and visit http://localhost/info.php. You should see the PHP information page, which confirms that PHP 8.2 and PHP-FPM are installed and functioning correctly with Nginx.

PHP 8.2 with PHP-FPM is now installed and configured to work with Nginx on Debian 12. You can now develop and host PHP-based web applications using Nginx as your web server.