Well, it looks like you have all done you can do quickly to edit PHP files with UltraEdit, one of the most powerful text editors on the world. The IDE (Integrated Development Environment) UEStudio is the big brother of UltraEdit and has more features for working with PHP projects because of its debugging support using WAMP server and Xdebug, IntelliSense features like function tips and the class viewer/browser.
page contains a user contributed auto-completion file for PHP4. You can also define/develop and use your own templates, tags, scripts and macros to make developing in PHP more efficient in future. You can make use of PHP.search website from within UltraEdit using the PHP symbol on the search toolbar, or you find somewhere a PHP5 help as CHM file which you can add to UltraEdit for quickly getting help on PHP5 functions offline from within UltraEdit.
Definitely not part of UE/UES setup for creating/editing PHP files is from where to download, install and configure all the applications needed to use PHP files offline, although UEStudio helps the PHP user with that part of the setup also a little bit. These applications have their own manuals and forums.