我正在使用会话在 php 中编写代码，它可以在 Mozilla 和 chrome 上运行，但在互联网上探索它不起作用？请帮我解决这个问题`
<?php
session_start();
if(isset($_POST['submit']))
{
$_SESSION['IGNITE']="IGNITE -";
$_SESSION['IGNITE_price']=39.95;
$_SESSION['IGNITE_qty']+=1;
$_SESSION['total_ignite']+=39.95;
}
if(isset($_POST['submit1']))
{
$_SESSION['REBUILD']="REBUILD -";
$_SESSION['REBUILD_qty']+=1;
$_SESSION['REBUILD_price']=39.95;
$_SESSION['total_rebuild']+=39.95;
}
if(isset($_POST['submit2']))
{
$txt_rebuild=$_POST['txt_rebuild'];
$txt_ignite=$_POST['txt_ignite'];
$_SESSION['IGNITE_price'];
$_SESSION['REBUILD_qty']=$txt_rebuild;
$_SESSION['IGNITE_qty']=$txt_ignite;
$_SESSION['total_rebuild']=$_SESSION['REBUILD_price'] * $_SESSION['REBUILD_qty'];
$_SESSION['total_ignite']=$_SESSION['IGNITE_price'] * $_SESSION['IGNITE_qty'];
}
$grand_total=$_SESSION['total_rebuild']+$_SESSION['total_ignite'];
?>`