title: PhpExcel: remove all formatting from sheet
body: <p>I am using the library PhpExcel to import data from Excel.</p>
  
  <p>I would like to remove all formatting from the spreadsheet so I can ready the values with the RangeToArray function.</p>
  
  <p>OR</p>
  
  <p>I'd like to read a range values but it seems that rangeToArray takes into account the formatting.</p>
  
  <p>How can I do ?</p>
  
  <p>Thanks a lot,</p>