PHP Directory Submissions Application

I have a shopping directory which uses an SQL database to list suppliers by product category. Details are currently submitted using very simple forms (using PHPforms). I am now looking for a custom written PHP application to allow suppliers to submit their information and subsequently edit or delete it. The application will also have screens for the administrator to approve the details. There are three types of information needed All suppliers must submit basic details Once approved suppliers can then choose to submit details of their products available in each category. I also wish to add a 3rd type of information – offers – whereby for any category in which the supplier already has a listing – they can add details of current offers. Providers should give full details of any PHP directory projects they have completed. Further details will be made available to providers submitting interesting bids.