i have a php script named as "abc.com/autologin.php". This autologin.php is hyperlinked to a button on another web portal def.com. so when a user on def.com click the button he visit abc.com/autologin.php.
So in autologin.php i want to fetch the url of the page where that button is clicked. Url is dynamic as it contains parameters different for different users.
You can use $_SERVER global variable to find referrer details.
$_SERVER['HTTP_REFERER']
Since URL cannot be fetched from the server side, it's better to use client side to get the URL. Also, it's slightly unreliable to rely on $_SERVER['HTTP_REFERER']. As always the request goes to the same PHP file, it's better to add a hidden input field which explicitly says from which URL, the request is originating.
<input type="hidden" name="fromPage" value="feedbackForm" />
<input type="hidden" name="url" value="https://www.example.com/feedback.html" />
And then capture them in your REQUEST data using:
$_REQUEST["fromPage"]
$_REQUEST["url"]
REQUEST data using: $_REQUEST["fromPage"] and $_REQUEST["url"]. Do you know PHP or not?$_SERVER['HTTP_REFERER'] will give you the referrer page's URL if there exists any.
You can use $_SERVER['HTTP_REFERER'] for more info http://php.net/manual/en/reserved.variables.server.php
