http://sg.php.net/manual/en/install.windows.apache2.php
Installing as an Apache module1. You need to insert these two lines to your Apache httpd.conf configuration file to set up the PHP module for Apache 2.0:
# For PHP 4 do something like this:
LoadModule php4_module "c:/php/php4apache2.dll"
# Don't forget to copy the php4apache2.dll file from the sapi directory!
AddType application/x-httpd-php .php
# For PHP 5 do something like this:
LoadModule php5_module "c:/php/php5apache2.dll"
AddType application/x-httpd-php .php
# configure the path to php.ini
PHPIniDir "C:/php"
2. Testing script:
<html>
<body>
<?php phpinfo(); ?>
</body>
</html>