The page: How to Install PHP 5.2 on IIS 7and Windows Vista (and a few others) reference a mysterious php5isapi.dll which is not in the Windows install, or the zip files:
php-5.3.2-Win32-VC9-x86.zip - VC9 x86 Thread Safe php-5.3.2-nts-Win32-VC9-x86.zip - VC9 x86 Non Thread Safe
There was another post on stackoverflow that said it's obsolete and replaced by "fastapi" but no instructions mention this.
I did find a php.dll in the zip file. Can I use that instead of php5isapi.dll?
It's very frustrating trying to install basic PHP5 on Windows with MySQL.