Prevent links from indexing by telling search engine spiders not to index certain files

PHP header function

header("X-Robots-Tag: noindex,nofollow");

 

http://www.ip-seo.com/latest/2009/08/x-robots-tag-control-google-indexing-via-http-headers/

 

http://googleblog.blogspot.com/2007/07/robots-exclusion-protocol-now-with-even.html

 

http://www.google.com/support/webmasters/bin/answer.py?answer=93710