dompdf，我有计算，我必须在我的PDF格式中，我该怎么办？

Question

我在javascript中有计算，我必须输入我的pdf，我该怎么办？

这是我的javascript

＆＃13;

＆＃13;

 <script>
function hitung(){ 

var e = (document.getElementById("ifin").value);
var a = (document.getElementById("Furniture").value);
var panjang =(document.getElementById("ipanjang").value);
var ht = 0.0;
var hf = 0.0;
var total = 0.0;

if (e == "hpl") {

				hf = 0.0;
			}
else if(e == "cat")
			{
				hf = 0.5;
}
else {
				hf = 0.0;
}
if (a == "kitchen"){
				ht = 1.7;	
}
else if (a == "meja"){
				ht = 2.3;	
}
else {
				ht = 0.0;
}
total = panjang*ht+hf;
document.getElementById("ototal").innerHTML ="Harga Total : Rp."+total.toFixed(2)+"0.000,00"+"<br>Sudah termasuk ongkir";
}



</script>

＆＃13;

＆＃13;

＆＃13;

我想将我的总数输入到dompdf，这是我的dompdf脚本

<?php

$nama = str_replace(" ", "_", strtolower($_POST['nama']));
$alamat = $_POST['alamat'];
$email = $_POST['email'];
$total = $_POST['<script>var = total</script>']
require_once("dompdf/dompdf_config.inc.php");

?>

我尝试插入像$total = $_POST['<script>var = total</script>']一样的总数，但它不起作用

我该怎么办？