如何创建将用户发送到另一个页面的链接，然后将该页面转移到与该链接相关联的另一个页面？

Question

How do I create a link that sends the user to another page which is then diverted to another page associated with the link?

I would like to create a list of html URLS that as any one of them is clicked, it sends the user to an intermediary page, which asks the user whether they agree to the terms and conditions. If they do they are diverted to that page corresponding to that link they clicked. Similary to this diagram.

Link 1 ==> Intermediary Page ==> Page 1,
Link 2 ==> Intermediary Page ==> Page 2,
Link 3 ==> Intermediary Page ==> Page 3,
Link 4 ==> Intermediary Page ==> Page 4,
Link 5 ==> Intermediary Page ==> Page 5

I do not know what process it called. I intend to use HTML and PHP.

Answer 1

An approach that's used a lot goes like this:

intermediary-page.php?proceedTo=some/url/to-go-next.php

On the intermediary-page.html (or php or whatever) page you perform the necessary verifications and redirect the user to the url available in proceedTo GET variable.

After that, it depends on your requirements. Do you want security or ensure that the user has accepted the terms and conditions or whatever? Then you should perform additional verifications on each page like so:

Link 1 -> Page 1 (check if the user has accepted the terms already? no? then:) -> intermediary?proceedTo=page1 -> (ask the user to accept! accepted? then:) -> Page 1 (user has accepted the terms now? yes? then:) -> stay here...

The advantages of this approach are:

1. You are pretty sure that even if a user has bypassed the intermediary page and went straight for the final destination - (s)he will get thrown back to the intermediary page (as if you were authenticating the user).
2. You don't need to create links like href="intermediary.php?next=abc.php", instead just go with simple href="abc.php" which will handle redirection itself.