The following article explains how to install PHP on a Windows Server running IIS 6. The process involves downloading the latest version of PHP directly to your Windows server and then installing the software. PHP is a free product.

To install PHP, please follow these steps:

  1. Log into your server through Terminal Services or Remote Desktop Connection.
  2. Open a Web browser and load
  3. Download the Windows PHP5.x ZIP package.
  4. Create a new directory, c:\PHP.
  5. Unzip the file you downloaded above into c:\PHP.
  6. Create a new directory, C:\PHP\phpsessions.
  7. Right click the C:\PHP folder and select Properties.
  8. On the Security Tab click Add.
  9. Type IUSR_COMPUTERNAME (where computer name is the name of your computer) in the text area, click Check Names and then click OK.
  10. Select the IUSR_COMPUTERNAME user, check the Full Control box and click OK.
  11. Open C:\PHP\php.ini-dist in Notepad.
  12. Within the file, make the following replacements:
    • Replace ;extension=php_mysql.dll with extension=php_mysql.dll
    • Replace ;session.save_path = "/tmp" with session.save_path = "C:\PHP\phpsessions"
    • Replace session.gc_maxlifetime = 1440 with session.gc_maxlifetime = 43200
    • Replace SMTP = localhost with SMTP =
    • Replace ;sendmail_from = with sendmail_from =
  13. Save the file as C:\windows\php.ini.
  14. Copy C:\PHP\libmysql.dll and C:\PHP\ext\php_mysql.dll to the C:\windows\system32 folder.
  15. Open IIS located under Control Panel -> Administrative Tools -> Internet Information Services (IIS) Manager.
  16. Right click Web Service Extensions and select Add a new Web service extension
  17. Enter php as the Extension Name, check Set extension status to Allowed and Click Add
  18. Enter the path to C:\PHP\php5isapi.dll and click OK
  19. Right click Web Sites and select Properties
  20. On the ISAPI Filters tab, click Add.
  21. Enter php as the Filter Name, enter C:\PHP\php5isapi.dll as the Executable and click OK
  22. On the Home Directory tab, click Configuration.
  23. Click Add.
  24. Enter C:\PHP\php5isapi.dll as the Executable, enter php as the Extension and click OK
  25. On the Documents Tab, click Add.
  26. Enter index.php and click OK
  27. A popup box may appear asking if you want to apply the settings to certain websites. Choose specific websites to enable PHP on or Select All and click OK.
  28. Right click your Computer Name, expand All Tasks and click Restart IIS
  29. Choose Restart IIS from the dropdown menu and click OK

To test your installation of PHP, please follow these steps:

  1. Open up Notepad and create a new document.
  2. Add the following text into your new document:
  3. Save this new file to your website root as phpinfo.php.
  4. In a Web browser, navigate to phpinfo.php.

You should have an output screen of all of the information regarding PHP for your server.

Installing PHP on Windows Server