单击刷新按钮时出现HTTP_REFERER问题

在一个简单的网上商店应用程序中，我试图检查购物

购物车。只应该填充当您在meerinfo.php中选择一篇文章

并点击指向winkelwagen.php的链接时。当我在浏览器中输入www.mysite.php / winkelwagen？id = 5时，它会在

被忽略的情况下工作正常。

br />
然而，当我从meerinfo.php转到winkelwagen.php时，当我点击刷新时，文章是

一次又一次地添加到购物车中
$ Internet Explorer中的b $ b按钮。有没有办法避免这种情况？


这是winkelwagen.php中的代码


if（！isset（$ _ SESSION ['' artikelen'']））//当第一个

文章被添加到购物车时启动数组

{

$ _SESSION [' 'artikelen''] = array（）;

}

$ waarvandaan = $ _SERVER [''HTTP_REFERER''];

if（b） strstr（$ waarvandaan，" meerinfo.php"））

{

$ id = $ _GET [''id''];

$ _SESSION [''artikelen''] [] = $ id;

}


感谢您提供任何帮助（或有关讨论此主题的文章的建议） ）


Martien

In a simple webshop application I am trying to check that the "shopping
cart" only should be "filled" when you choose an article in "meerinfo.php"
and click on a link to "winkelwagen.php". It works fine in that sense that
when I would enter in the browser "www.mysite.php/winkelwagen?id=5"it will
be ignored.
However when I go from meerinfo.php to winkelwagen.php , the article is
added again and again to the shopping cart when I click on the refresh
button in Internet Explorer. Is there a way to avoid that?

This is the code in winkelwagen.php

if(!isset($_SESSION[''artikelen''])) //initiate the array when the first
article is added to the shopping cart
{
$_SESSION[''artikelen''] = array();
}
$waarvandaan = $_SERVER[''HTTP_REFERER''];
if (strstr($waarvandaan, "meerinfo.php"))
{
$id = $_GET[''id''];
$_SESSION[''artikelen''][] = $id;
}

Thanks for any help (or suggestions for articles that discuss this topic)

Martien