PHPSESSID and search engines

My search engine keeps indexing session IDs

[sara417]

I'm having a problem and was hoping someone could offer some advice.. or at least a theory? I have a site that I've installed a PHP search engine script on.

It works great... except that it finds result sets for many different PHP session IDs. I don't want these sessions to be indexed and can't seem to stop it from happening.

Example:
At [somedomain.com...] I type Dining in the Search Form.
I get 20+ results, but only about 6 or 7 are valid.

I get both, a valid returned result of:
[somedomain.com...]
and a path which shouldn't be reported as:
[somedomain.com...]

There is URL after URL of these PHPSESSID's, which are links to the same original page of [somedomain.com...]

Any idea why this might be happening?
Where are these session ID's stored? What the heck are they? I can't find them anywhere to tell the search engine not to index them.
Anyone.. please! I've looked everywhere.

Thanks.

[coopster]

Welcome to WebmasterWorld, .

Are you familiar with how PHP propogates and passes a session ID [php.net]? Seems to me you probably have a session configuration directive turned on that you don't want to have on. The link explains more.