Prerequisites

• Windows 11 operating system
• Administrator access to your computer
• Stable internet connection
• Web server software (e.g., Apache or IIS) installed (optional)

Installation

1. Visit the official PHP downloads page: https://windows.php.net/download#php-7.3
2. Download the PHP 7.3 ZIP package for Windows (select the appropriate version: x86 or x64)
3. Create a new folder in your C: drive named "php"
4. Extract the contents of the downloaded ZIP file into the C:\php folder
5. Open the Windows Control Panel and navigate to System > Advanced system settings
6. Click on "Environment Variables" and edit the "Path" variable
7. Add "C:\php" to the list of paths
8. Rename the "php.ini-development" file in the C:\php folder to "php.ini"
9. Open php.ini in a text editor and uncomment the required extensions by removing the semicolon (;) at the beginning of the line
10. Save the changes and close the file

Verification

1. Open Command Prompt
2. Type "php -v" and press Enter
3. If PHP 7.3 is installed correctly, you should see output similar to:

   PHP 7.3.x (cli) (built: ...) ( NTS )
   Copyright (c) 1997-2018 The PHP Group
   Zend Engine v3.3.x, Copyright (c) 1998-2018 Zend Technologies

4. To test PHP with a web server, create a file named "info.php" in your web server's document root with the following content:

   <?php phpinfo(); ?>

5. Access the file through your web browser (e.g., http://localhost/info.php)
6. If successful, you should see the PHP information page displaying details about your PHP 7.3 installation