To install PHP on Windows, follow a series of steps to download and set up PHP.Select the appropriate PHP version, Thread Safe version is recommended for use with web servers like Apache.Choose the correct architecture, download either the x86 or x64 version depending on your system architecture.Extract the Zip file: Use a tool like WinRAR or 7-Zip to extract the downloaded Zip file into a directory.In the extracted PHP folder, copy the 'php.ini-development' file and rename the copy to 'php.ini'Edit the 'php.ini' file and enable required extensions.Set the 'extension_dir' to ensure it points to the 'ext' folder inside your PHP installation directory.Add PHP to the Windows PATH Environment Variable by editing the PATH variable and adding the path to the PHP folder.Test PHP Installation by opening a Command Prompt and typing the following command: php -v.Install and Configure a Web Server (Optional, if you want to run PHP on a server)