how to know from which URL the user has been redirected to a page in our site in php

Question

I have written a webservice client connected to a bank address. After the user is being sent to the bank's website and completes the from, then automatically is being redirected to the page named callback.php

Now, I want to know that from which address the user is being redirected to callback page?! Is there a way to know it through PHP and of course if possible in codeigniter?!

Answer 1

You should be able to access the referring location (if the user's browser has sent it, that is), with the following variable $_SERVER['HTTP_REFERER']

This should be accessible to you regardless of framework.

Answer 2

There is no 100% way to solve this ...

You can try to use the Referer which was sent .. .but this result can be manipulatet or edited by user/browser etc...

<?php 
    $_referer = $_SERVER["HTTP_REFERER"]; 
 ?>

Answer 3

Codeigniter has it own user agent class

CI3 http://www.codeigniter.com/user_guide/libraries/user_agent.html

As per what user guide said.

if ($this->agent->is_referral())
{
   echo $this->agent->referrer();
}

CI2 http://www.codeigniter.com/userguide2/libraries/user_agent.html