what is ipn.php file

[seohyderabad]

Hi friends ,

please tell me what is ipn.php file used for coz yahoo is indexing some link in it

http://66.218.69.11/search/cache?p=http%3A%2F%2Fdirectory.seohyd.com%2F&prssweb=Search&ei=UTF-8&fr=yfp-t-501&x=wrt&u=directory.seohyd.com/ipn.php&d=SrGH4ZIFNvOU&icp=1&.intl=us

check out here and google in my last post i asked about it here
http://www.phplinkdirectory.com/forum/showthread.php?t=6895

but noreply can somebody please tell me whats the problem

Thanks

[iamnewbies]

I think ipn.php use for return when buyer advertsing paid via paypal success for paid link on you sites

[David]

Yes, he is right. This file is used for paypal.