I would like to slightly change the content of a page if a user came from a search engine, as opposed to an email/blog/forum/etc link.

How should I go about doing this?

Thanks

Check the referrer ($_SERVER['HTTP_REFERER']) field for a known search engine.

But don't rely on it, as the field is optional and can be overridden by the client.

if you are using Google analytics for tracking your statistics then you can follow this code:

$refer=explode('utmcsr=',$_COOKIE['__utmz']);
if(count($refer)>1) $refer=explode('|',$refer[1]);
$refer=addslashes($refer[0]);

Here, when you will have a hit either from search engine or a direct hit, you will get the refer value. just check this.

Originally Posted by Arings

if you are using Google analytics for tracking your statistics then you can follow this code:


Here, when you will have a hit either from search engine or a direct hit, you will get the refer value. just check this.

And the data comes from 'HTTP_REFERER' originally so why add the extra step?

nice posting,I definitely use it.