How to use $_SERVER['HTTP_REFERRER']

[hno]

 

How should use it.I mean if I write:

echo $_SERVER['HTTP_REFERRER'] It will return what his/her has been search in google?

 

Thanks

[oni-kun]

No. It will return the last page they were on (in some cases, google). Maybe you should look at what a referrer is, you obviously don't know.

[Daniel0]

That could easily work. Just check if the referrer is from Google's result page.

[hno]

That could easily work. Just check if the referrer is from Google's result page.

Thanks for your reply

 

Please give me an example of the usage .

Is it just enough:echo $_SERVER['HTTP_REFERRER'] ;

Thanks

[Daniel0]

Well, say I'm at http://www.google.com/search?q=php+help (Google search results for "php help") and I follow a link to PHP Freaks. If I do echo $_SERVER['HTTP_REFERRER'];, I'll just get http://www.google.com/search?q=php+help back. Whether that's "enough" is up to yourself of course.

 

Consider this example:

<?php
$ref = 'http://www.google.com/search?q=php+help&ie=utf-8&oe=utf-8&aq=t&rls=com.ubuntu:en-US:official&client=firefox-a';

$components = parse_url($ref);

if (preg_match('#^(?:www\.)?google(\.[a-z]+){1,2}$#i', $components['host']) && $path == '/search') {
parse_str($components['query'], $query);
if (isset($query['q'])) {
	echo 'Google search query: ' . htmlentities($query['q']);
}
}