First you need to install and get it working.

This is simple step. After installation, reboot your computer and go to

http://localhost

Now you will see Apache default page.

If(localhost shows default page) {

Apache is working, you can install PHP now

} else {

Apache is not properly installed or having some problem.
You need to fix it before going further.

}


PHP Install

If you download the MSI (installer) package, it is easy to get PHP working.

Anyway read INSTALL.TXT file, it have detailed description on how to get PHP working with Apache.