on Change of dropdown list showld call the php function

Question

On change of the dropdown list, A php function should called.

Inside the PHP function I will do some calculation. Later I need to set the value of a text box or else

Answer 1

You can't call a php function from js or html, but you can do that by ajax call to a php function where you can perform your calculation and then return the result value to js, so then you can do by js to html...

Update:

   Select Employee
    

function getIPL(id)
    {
            $.ajax({
                       type: "GET",
                       url: "EmpLeave.php",
                       data: "emp_Id =" + id,
                       success: function(result){
                         $("#somewhere").html(result);
                       }
                     });
    };


 // Empleave.php file....
  if(isset($_GET['emp_Id'])){
     GetTotalPL($_GET['emp_Id']);
 }

 function GetTotalPL($id){
  // do your calculation...
}