Idea/Suggestion for PHP App

Hey... I am new to the list so please forgive me if I say anything that might have already been discussed. So here we go... OK I am attempting to start a new application using PHP. I have started and stoped this application now 2 times cause I get moving then I stop realizing I should have done this work before hand and in a differant way. I was wondering does anyone have any places I can read on how develope a PHP Web application like what area should I start with first, what are somethings I need to think about before hand. The application I am working on is Database driven app. It will have data inserted into the DB from various data sources that are manually entered. However I need to develope the app as dynamic as possible for future add-ons... I know I am probably biting off more then I can chew at this time... So any pointers or exampled (which would be great) on how to start an app from scratch and also how to use OOP (Which I have a feeling is what I need to learn) would be wonderful. Thank you all for any help you can provide. Thanks, Billy S. -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean.