Visual Reporting (i.e graphs) and Dashboard for PHP Application

General information for the website: We have a mini project management application that requires some additional reporting and dashboard functionality.
Kind of development: Customization of existing website
Description of every page/module: Reporting Page
Dashboard
Description of requirements/features: Reporting Page: We already have a page where the user can select filter options like Status, Owner, Dates etc. What this does is it returns a results list with the data visible in a table. At the moment one can then export this to .xls from where one can then create graphics. I would like some functionality here to visualize the data in some graphs. Any ideas welcome.

Dashboard: We would like to add a menu item to the app which is a dashboard page. Essentially we would like some reports in a graphical way on the app. Any ideas welcome.

Please send me examples of Reporting & Dashboard work you have done where you have graphs you generate from data in an app. If you have not done this before successfully, please do not reply to this Job! I will be looking for proper references.
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