问无法使用ajax将变量从javascript传输到php

EN

<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<script src="https://code.jquery.com/jquery-3.5.1.min.js"></script>
            <script >

          $('#btn').click(function(){
             var grandtotal=document.getElementById("gt");
                var x =grandtotal.textContent;
                var gtotal= String(x);;
var emp={};
emp.name=gtotal;

             if(x=== '₹0'){
             alert("Add to your cart")}
             else{  $.ajax({
        method: "POST",
        url: "connect2.php",
        data: emp,
        success: function(data){
            console.log(data);

        }
        });
              // location.href='connect2.php'


             }});
            </script>

<?php
print_r($_POST);
if(isset($_POST['gtotal']))
{
    $gtotal = $_POST['gtotal'];
       echo $gtotal;
}
?>