Prerequisites

• A Debian 10 (Buster) system with root or sudo access
• Terminal access to the system
• Internet connection for downloading packages

Installation

1. Update the package list:

   sudo apt update

2. Install the required packages:

   sudo apt install -y lsb-release ca-certificates apt-transport-https software-properties-common

3. Add the Ondřej Surý PHP repository:

   sudo add-apt-repository ppa:ondrej/php

4. Update the package list again:

   sudo apt update

5. Install PHP 7.0 and common extensions:

   sudo apt install -y php7.0 php7.0-cli php7.0-common php7.0-curl php7.0-gd php7.0-json php7.0-mbstring php7.0-mysql php7.0-xml

Verification

1. Check the PHP version:

   php -v

   You should see output similar to:

   PHP 7.0.33-0ubuntu0.16.04.16 (cli) ( NTS )
   Copyright (c) 1997-2017 The PHP Group
   Zend Engine v3.0.0, Copyright (c) 1998-2017 Zend Technologies

2. Verify installed modules:

   php -m

   This will list all installed PHP modules.

3. Create a test PHP file:

   echo '<?php phpinfo(); ?>' | sudo tee /var/www/html/phpinfo.php

4. Access the phpinfo file through your web browser:

   http://your_server_ip/phpinfo.php

   This will display detailed information about your PHP installation.