Add function to existing website with mySql-Database

Current links: Overview [*1] Form [*1] Download [*2] Settings (*3) *1 = Overview and Form shows and edits database records of the selected language on the right-top sport *2 For some reason this only works when the user is in Overview *3 Settings is the actuall translator-tool and an overview of the avaiable text-elements so that somebody that for examples speak italian and spanisch can translate ES to IT or another that speak englisch and FR can translate EN to FR Problems 1. With have currently more than 1500 records but when we click on download we only get 673 records 2. we need additional fields like: 2.a barccode per unit for example 4009999109996 => 4009999-10999-6 | 10999 = Barcode - 6 = Check digit = D 2.b two new field generated out of 2.a (1. Field 400999920999D 10999 becomes 20999 2. Field 400999930999D) 10999 becomes 30999 2.c we need fileds for quantity-inner-bag, inner-unit, quantity-outter-carton, outer-unit, carton width, carton length, carton height, carton-weight 3. when 1 and 2 is fixed we need a function, where we have a field where we place item-numbers and a click on generate labels and it creates inner-labels and shipping-marks like the pdfs attached with the items meontioned on the field