Forum Moderators: phranque
Welcome to WebmasterWorld [webmasterworld.com]!
Search engines do not like URLs with long and complex query strings like:
http:www.example.com/members.php?id=30050201&ui=40357&pc=1024&ul=ru&ol=en
The more variables present in the string, the less likely they are to spider deeply.
The usual recommendation is to not use more than two querystring variables, and to use only one if possible. Also, don't ever use variables called "id" or "sessionid."
A possible solution is to make your script output search-engine-friendly static URLs when generating your pages, and then use mod_rewrite to convert incoming user requests for those static URLs back into calls to your script.
Jim