Dynamic data from user file

Greetings: I currently am using the fgetcsv function to read in fields from a user-defined file. The delimited file is read and displayed just fine. Firstly, what I'm trying to accomplish: The MySQL database has a table with about 30 fields. The user-defined file may contain only some of these fields and in no particular order. I'm trying to achieve a way for the user to specify what each field is so the insert into MySQL is done correctly. (An analogy would be a custom import. The problem I'm having is finding the best way to go about this. I've been able to read in the data via fgetcsv and dynamically displaying a drop down box above each field with all possible choices but am unable to create a way to link the two for each field successfully. Been looking for solutions as well as trial and error to no avail. Any suggestions? -Sean.