Is it possible to set topics, to be automatic deleted after X days in a forum.?

 

Is this feature something you will look at.?

Because so can i use it, so my users can create sales announcement in the forum.

Yes.. but this can be done other way around.. you can set a function in any script you are sure that runs everyday, lets say.. several times each hour... so the script will triger a function to check all the pending notifications, comparing dates. As I said.. If the date is the same, it will take action... If not, the date will be reset.  To avoid the overhead of the function all the time, you can trigger it depending on the time of the day or a particular event - Exemple - It will trigger everytime a new reply is done each day before 10 a.m. or only when the first user logs into the forum each day.

I do that withmy news RSS... since RSS is only updated when a news is post in done, I only call the "update RSS" function when a news is created, updated or deleted.

Also if a scheduled tasks is triggered by a page view then if the scheduled task takes time to run that visitor may have to wait some time for the page to display. This could loose you visitors or worse still if it was Googles search bot having to wait for the page to load could lower your search ranking which now also take in to account how long pages take to load on your website.

When considering new features, it maybe a great idea, but you also have to consider how the feature would be implemented and it's impact on performance and security.