refactored the controller code in the shirt page to consume data prepared by the model.  Added sql injection protection in the model and controller
refactored added a new PDO object to fetch a joined sizes and product table and loaded into a while loop to add the data onto the producy array to populate shirt size drop down on the shirt page
refactored the rest of the model code to full from the database as individual calls instead of calling all the products and loading into an array.   Completed the TH PHP Dev track