Possible Duplicate:
Track where users come from in PHP?
How can you check if a (unique) visiter/开发者_Go百科user was directed to your site from stumbleupon, google or facebook in php?
Check out the referer header $_SERVER['HTTP_REFERER']
Possible Duplicate:
Track where users come from in PHP?
How can you check if a (unique) visiter/开发者_Go百科user was directed to your site from stumbleupon, google or facebook in php?
Check out the referer header $_SERVER['HTTP_REFERER']
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