Installing PHP 5 on IIS in 5 simple steps


Restart and verify

Almost done now. Restart your server so that all the changes we have made are made effective in one swoop. Once your server has restarted create a file called phpinfo.php and place it in one of your websites that you can get access to. Open the file and enter this code;




Save the file and then open your web browser and access you phpinfo.php file and you should be presented with a screen detailing your PHP configuration. If this is what happens then you are up and running, if not then something has gone amiss. Feel free to ask me for help in the forums though.

As already stated if you require PHP 4 (for legacy code, etc) then your job is much easier. Just Download the IIS Aid PHP Installer and run through the GUI based installation wizard and everything is setup for you. With PHP now enabled you are on your way to being able to utilize one of the most popular web scripting languages in the world, which is used by thousands of free, and commercial web applications. Be sure to check back on this site in future for some PHP tuning tips and performance comparisons to make sure you are getting the most out of your PHP environment.


Anonymous's picture

Truely 5 Steps and very easy

Thanks for a superb article. Read a few articles on installing PHP on IIS but couldn't get it done. This one did the trick.

Anonymous's picture

Thanks a lot, its easy and

Thanks a lot, its easy and nice article
Only one extra thing i did i repeated first part of the 3rd step for my virtual directory as well.

Anonymous's picture


So, I've got everything working with PHP using this guide, and the site I made works great!

However, I was wanting to extend the site to add an email verification thing (you know, where you have to click some link emailed to you to verify you're a person), and I was using the 'mail' function PHP has.

This is the first time I've ever touched email from PHP, so this may have NOTHING to do with IIS (It's Windows 2000 Server, so using IIS 5.0) and entirely to do with my naivety, but I can't get email to work. Here is my code:

$mail = mail('', 'Hello, world!', 'This is a message from PHP. Neat, huh?');

if ($mail == TRUE) {
printp('Mail sent!');
} else {
printp('Mail fail.');

How would I get this to work? The email address there was edited, in my actual page it's using my own personal email address.

I have IIS's SMTP service installed, but I don't know how to configure that either. I've never touched email serving before, so this could really be just me being naive.

Anonymous's picture

You are a star

Mate, I don't know how many years ago have you posted this useful information. I was trying to learn PHP through a book, but their instructions to install PHP in IIS didn't work and I was stuck. This was just WONDERFUL information from you. Thank you very very very much.

Anonymous's picture

Is PHP5.3 much different when installing?

Excellent tutorial. I am getting an error in phpmyadmin -
Your PHP MySQL library version 5.0.51a differs from your MySQL server version 5.5.12. This may cause unpredictable behavior.

So I guess I need to upgrade PHP, or downgrade MySQL. Do you agree?
Is there any chance you will be posting instructions for installing PHP 5.3 on IIS? I tried following the same instructions but it doesn't work :(


Brashquido's picture

No ISAPI in PHP 5.3

You'd be correct with your guess. PHP 5.3 is a pretty big change from PHP 5.2, one of the most notable changes was the ISAPI interface (which is used in this guide) was dropped from the package. I will be creating an install guide, however it may be a month or two off yet.

Dominic Ryan
6 x Microsoft IIS MVP, MCSE, MCSA
IIS Aid owner/webmaster

Anonymous's picture

Excellent Doc - Thanks

It solved my problem on IIS5. Step by Step useful instructions.

Thanks a lot,

Anonymous's picture

Getting error: Execute Access Forbidden

I did everything as stated here, but i am getting following error. Kindly help.
HTTP 403.1 Forbidden: Execute Access Forbidden
Internet Information Services

Anonymous's picture

PHP installed by WAMP to be configured in IIS 5.1

Before i start following the tutorial, i would like to clarify whether I can follow these steps if I have the php instance installed in my system through WAMP.
I have the WAMP server running and my php directory resides in C:\wamp\bin\php\php5.3.5

Please guide me..
Thanks in Advance


Anonymous's picture

PHP5Isapi.dll is not available in PHP 5.4

i tried to do installation with this article, but unfortunate that the downloaded php 5.4 do not contain the php5isapi.dll file.
also the PECL Win32 binaries is not found on php download site.

how can i complete this installation! can anyone suggest?