检查用户是否从另一个页面重定向

Question

I have a <form> that sends the user to an external page: action="http:/example.com/test/test.php" . The test.php on the external page executes an SQL query and sends the user to my internal page test2.php . The second page test2.php also executes an SQL query and the process gets closed.

I want to perform an check operation in test2.php . I only want to run the SQL query if the user is redirected from the external page.

How can I do this?

Answer 1

You can check the Referer header with $_SERVER['HTTP_REFERER'] to see what page they were redirected from. This isn't reliable, though, since people can forge headers, but for the most part, if people are using browsers, you can use this to check if they were redirected.

Answer 2

为什么不使用像http://example.com/test/test.php这样的URL参数？ redirect = true

Answer 3

Instead of having your form use a cross-domain action , perhaps you can have your PHP code use curl to submit the information to the foreign server. Then your PHP code will know exactly what happened.