Check url of referer and print a message

Hi all!

I have been trying to find how to get the refering url to a page of my website, check if it's included on a txt file and then print a modal popup with a message. So, if you come from a friend url included on the txt it will welcomes you "You come from a friend's url" for example, and if not, then another msg will be printed.

Someone knows? I have found codes for the different functions separately but don't know how to put them all together to do this.

Thanks!

 

You need to use:

 
var referrer = document.referrer;

Code (markup):

If you want to get the domain name use:

var referrer = document.referrer.split('/')[2];

Code (markup):

 

Hi! thanks for answering.
I think I would need something like this :

<?php
if (ref.match(/^https?:\/\/([^\/]+\.)?friendsite\.com(\/|$)/i)) {
  alert("You came from a friend Website");
  else { alert("You came from a non friendly Webstie");
}
?>

Code (markup):

But this is just not working at all as it gives me a 500 error. Thanks for helping!

 

Don't wrap the code in PHP tags, it's JavaScript.

<script>
if (ref.match(/^https?:\/\/([^\/]+\.)?friendsite\.com(\/|$)/i)) { 
alert("You came from a friend Website");
} else {
alert("You came from a non friendly Webstie");
}
</script>

Code (markup):