Mert Öztekin wrote: > hi; > > i cant imagine how user forums understood that loginned member did read the topic or didnt read it? > > first forum compares last login and topic creation time. but after you read some of the topics, but if you read some of them, forum eliminates those. but how? what is its logic? does it stores information in database for all users? > > thanks Most forums have a sessions table, which stores a record for each thread a particular user has looked at in the past 30 days or so. then, its just a simple DB pull, and comparison. PHP Data object relational mapping generator http://www.metastorage.net/ Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/php-objects/ <*> To unsubscribe from this group, send an email to: php-objects-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/