Currently no official 64bit versions of Apache and PHP exists for Microsoft Windows. Only MySQL supports officialy 64bit Windows. If you have a 64bit version of Windows (2003/XP/Vista) and want to keep your system pure 64bit here is the solution!
In this guide I will show you how to install and set up Apache 2.2 x64 web server, PHP 5.2 x64 and MySQL 5.0/5.1 x64 on Windows 2003/XP/Vista 64bit using unofficial binaries. Althought this setup has been tested successfully on Windows Vista 64bit Home Premium, I am not responsible for any damages may occur to your computer by this guide. Proceed at your own risk.