PHP Script to import/export Excel files

I need a set of PHP scripts to read/write MS Excel files into mySQL db. script1: form to upload Excel file and take data into SQL table (new records). script2: form to upload Excel file and update fields in SQL table (existing records with index field). script3: page to put SLQ data into formatted Excel file for download. Details: - The SQL structure and Excel files will be pre-set (no need to create fields dynamically and can ignore additional fields). - Need to be able to specify which fields (in the script or form page on the server) - Would like confirmation of # records read in/out. - Need error notice of invalid data (and record ID#) - Data will be selected based upon a project # (script will only be run if valid user based on session login so no need to validate user) - Support MS Excel 2003 and newer? - Open to suggestions if any of these details make a large difference in cost or time.