How can I find out where a site visitor comes from?
$_SERVER["HTTP_REFERER"]
So imagine there was a link on http://www.mysite.com to http://www.yoursite.com/index.php and on that page you had:
$detect = $_SERVER["HTTP_REFERER"];
echo "I know where you came from! You clicked on a link from $detect didn't you!";
... then you will be able to tell your user where they came from.
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