All the secret of the Dreamweaver with PHP remains in the Application Bindings Tab (CTRL F10). is very simple to use and you can create RecordSets, Queries, Search engines, logins, etc etc.
You just have to be familiarized with webdesign and some Database logic.
You also need to install PHP (php.net) in your computer and I recommend MySQL (mysql.com) for your database. You also can get the MySQLControl Center to manage your data
There are many forums and places where you can get info, you just need to look for it.
Also a lesson book is always a great tool
Good Luck and welcome!