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I've been searching for some WP specific way to detect any referrer. Have an idea? I know how to do that in PHP but I just want to know if there's some WP function to do that?

EDIT: here is what I 'm trying to test =>

$referer = wp_get_referer();
if (  strpos($referer ,'http://wordpress.org') !== false ) echo 'you come from wordpress.org';
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up vote 3 down vote accepted

The best way to check the referrer will depends of what are you trying to do. You can use wp_get_referer() or wp_get_original_referer(), but if you want to check the referer for security reasons you should definitely use other functions like check_admin_referer(), check_ajax_referer(), wp_referer_field() or other of the Wordpress Nonces related functions.

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thanks, I know AJAX and security functions, already used several times but I was not aware WP can check referer in URL for SEO => trying to achieve some basic detection – JMau Sep 8 '13 at 10:11
I've edited my thread to be more precise with my question – JMau Sep 8 '13 at 10:14

You can get it using wp_get_referer() and wp_get_original_referer() functions.

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Ok thanks, was expecting more details (you know kinda wiki) -> but this is this function so – JMau Sep 8 '13 at 9:43
You can get more information for it from codex pages which i have linked with function names. – Vinod Dalvi Sep 8 '13 at 9:44
never had to use these functions before, will try. – JMau Sep 8 '13 at 9:49
Difference between the 2 functions is that if a page post a form to itself wp_get_referer() return false, wp_get_original_referer() return the original referer. However, note that both make use of $_SERVER['HTTP_REFERER'] that, as said in php docs, "Not all user agents will set this, and some provide the ability to modify HTTP_REFERER as a feature. In short, it cannot really be trusted." @JMau – gmazzap Sep 8 '13 at 15:57
@G.M. thanks. I know UA sniffing has some major drawbacks ! – JMau Sep 9 '13 at 8:40

use wp_get_referer(); to Retrieve referer from '_wp_http_referer', HTTP referer, or current page respectively. for more info read codex

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Is your answer different from my answer? – Vinod Dalvi Sep 8 '13 at 9:42
you answered both in the same time – JMau Sep 8 '13 at 9:42
not too much but we are both writing answer at same time, when i am going to click on submit answer button the notification was appear but i was late, clicked and answer was posted. – Anjum Sep 8 '13 at 9:44
@JMau I thought i have answered a minute before. – Vinod Dalvi Sep 8 '13 at 9:44
@Anjum It's ok. – Vinod Dalvi Sep 8 '13 at 9:45

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