title: How to modify existing excel file using PHP?
body: <p>I have a excel i need to add some more sheets into the excel using PHP, i have used PEAR, there i tried only can write excel and read a file, not able to read and modify the file, guys can you help me in this?</p>
  
  <p>Thanks in advance</p>
  
  <p>Prabu</p>