I know How Excel sheet in php .But wat i want is how to create Multiple sheets in Excel . This is the code for creating one excel sheet

Code:
<?php
header('Content-type:application/ms-xls');  
header("Content-Disposition: attachment; filename=Emp_Skillgap.xls");

header("Pragma: no-cache");
header("Expires: 0");


?>

How to Create Multiple...