title: PHPExcel: Read all values (date, time, numbers) as strings
body: <p>I am facing issues with dates and time. I want them to be read just like they appear in the excel workbook.</p>
  
  <p>So, I believe if I get all cells of the sheet using toArray(), then I should simply do something (some format conversion) that will map all cells as strings, dates, times etc.</p>
  
  <p>OR may be there is function like load, which load all data in the workbook as string without any formating or other complex stuff.</p>