blocks|key|969783|text|所以如果我理解正确的话：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|969784|用户登录到您的页面上。transaction.|969785|Once+|unordered-list-item|969786|
|969787|他们点击贝宝按钮/提交表单|969788|969789|，现在他们正在www.paypal.com完成他们的|969790|969791|完成，他们被重定向回你的页面。|969792|969793|您可以使用cookies，但是它们并不是故障安全的，因为用户可能会禁用它们。|offset|length|style|BOLD|969794|一种可能的方法是创建一个唯一的标识字符串，该字符串将被发送到paypal，以便将它们重定向到带有该字符串的自定义URL。在该页面中，您将验证它，并授权用户。|969795|entityMap^0|0|0|0|0|0|0|0|0|0|0|F|A|0|0^^$0|@$1|2|3|4|5|6|7|11|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|12|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|13|8|@]|9|@]|A|$]]|$1|G|3|H|5|6|7|14|8|@]|9|@]|A|$]]|$1|I|3|J|5|F|7|15|8|@]|9|@]|A|$]]|$1|K|3|H|5|6|7|16|8|@]|9|@]|A|$]]|$1|L|3|M|5|F|7|17|8|@]|9|@]|A|$]]|$1|N|3|H|5|6|7|18|8|@]|9|@]|A|$]]|$1|O|3|P|5|F|7|19|8|@]|9|@]|A|$]]|$1|Q|3|-4|5|6|7|1A|8|@]|9|@]|A|$]]|$1|R|3|S|5|6|7|1B|8|@$T|1C|U|1D|V|W]]|9|@]|A|$]]|$1|X|3|Y|5|6|7|1E|8|@]|9|@]|A|$]]|$1|Z|3|-4|5|6|7|1F|8|@]|9|@]|A|$]]]|10|$]]

So if I understand correctly:

<ol>
<li>The user is logged in on your page.</li>
<li>They click on a paypal button / Submit a form</li>
<li>Now they're at www.paypal.com completing their transaction.</li>
<li>Once finished, they are redirected back to your page.</li>
</ol>

You could use cookies, but they're not fail-safe since the user may have them disabled.

A possible method is making a unique identification string that would be sent to paypal so they are redirected to a custom URL with the string. In that page you validate it, and authorize the user.

blocks|key|969831|text|只需将当前会话id+(使用$id+=+session_id()；)传递给Paypal，一旦您获得用户和会话id，从Paypal返回，只需将会话id设置为Paypal使用session_id($idPaypalSent)发送给您的会话id；|type|unstyled|depth|inlineStyleRanges|entityRanges|data|969832|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Just pass the current session id (get it with $id = session_id(); ) to Paypal, and once you get the user, and the session id, back from Paypal just set the session id to the one Paypal sent you using session_id($idPaypalSent);

blocks|key|1004923|text|会话id的概念是错误的:会话id不仅仅是另一个会话变量，而是会话的id，因此可以将用户分配给会话变量。您可以通过$sess_id+=+session_id();获得会话id，并将其作为"&ppsessid="+.+$sessid附加到自定义返回变量。然后，您可以通过session_id($_GET['ppsessid']);设置会话id。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1004924|entityMap^0|1K|O|2K|M|3P|U|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]|$9|K|A|L|B|C]|$9|M|A|N|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|O|8|@]|D|@]|E|$]]]|G|$]]

You have a wrong concept of session id: The session id is not just another session variable, but the id of the session, so that you can assign the user to the session variables. You can get the session id via <code>$sess_id = session_id();</code> and attach that to the custom return variable as <code>"&amp;ppsessid=" . $sessid</code>. You can then set the session id via <code>session_id($_GET['ppsessid']);</code>.

blocks|key|969872|text|也许我错过了什么。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|969873|所以你的用户登录..。点击购买现在按钮或任何东西，并去贝宝网站，当完成后，回到您的网站在一个页面，在用户区域内。|969874|这应该是无缝的，而不用你做任何事情。除非用户在paypal站点上花费了太多时间，并且会话到期时间在服务器上，否则用户关闭浏览器并直接进入paypal支付页面。|969875|只要会话超时允许，会话将保持活动状态，并且只要会话超时允许，用户就可以在站点和其他站点之间来回移动。|969876|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|J|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|K|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|L|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|M|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|I|$]]

May be i am missing something.

So your user logs in .. clicks on buy now button or whatever and goes to paypal site, when finished comes back to your site on a page which lies inside the user area.

This should work seamlessly without u having to do anything. UNLESS the user spends too much time on the paypal site and the session expire time is reached on the server OR the user closes the browser and goes directly to your paypal payment page.

The session will stay alive for its live and the user can move back and forth between your site and some other seamlessly as long as the session timeout allows.

blocks|key|1004963|text|我很抱歉碰到了一个老问题，但我今天早上遇到了这个问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1004964|原来我已经忘记了session_start()；！|1004965|在返回(订单确认)页面上这样做之后，发现我的会话一直都很好--只是没有在特定的页面上开始。|1004966|希望这能帮到别人|1004967|echo+'session+var:'.$_SESSION['var'];
if+(!isset($_SESSION))
{
++++session_start();
}
echo+'session+var+again:'.$_SESSION['var'];|code-block|syntax|javascript|1004968|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|P|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|Q|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|R|8|@]|9|@]|A|$]]|$1|H|3|I|5|J|7|S|8|@]|9|@]|A|$K|L]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

My apologies for bumping an old question but I had this problem this morning.

Turns out I'd forgotted to session_start(); doh!

after I did that on the return (order confirm) page, turns out that my session was fine the whole time - it just wasn't started on that particular page.

Hope this helps someone 

<pre><code>echo 'session var:'.$_SESSION['var'];
if (!isset($_SESSION))
{
 session_start();
}
echo 'session var again:'.$_SESSION['var'];
</code></pre>

I have a question about using paypal on a page where the user is logged into

It is with php

How can you have the user still authorised for that page if paypal is redirecting back to that page.

I read something about giving the session_id to the custom variable with PDT
What about, if you have multiple session variables. Can you also pass an array to the custom variable?

How is it done, codingwise

any insights are good

edit:

Is the PDT custom variable just some self invented name that you stick behind the 
other obligated variables.

like so: 

$req = "tx=$tx&amp;at=$token&amp;cmd=$cmd";

$req .= "&amp;somevariablename=".session_id();

thanks, Richard

paypal returnurl is loggedin page

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我有一个关于在用户登录的页面上使用paypal的问题。它使用php。如果paypal要重定向回该页面，您如何才能让用户仍然获得该页面的授权。如果您有多个会话变量，我读到了一些关于将session_id交给带有PDT的自定义变量的内容。还可以将数组传递给自定义变量吗？从成本上讲，是怎么做到的任何见解都是好的编辑：是PDT...

问paypal返回托辊是loggedin页面
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