title: How to add data to an existing Excel file with PHP?
body: <p>I have a Excel file with forms and controls. As it is not possible to create a Excel file with forms, controls and VBA code from scratch using PHP, I thought I could upload my empty Excel file to the server, update it and then let the user download it.</p>
  
  <p>I know there are some very good PHP classes as PHPExcel, but I don't know if these classes may append data as said. Does anybody has already done this before?</p>