How to remove all timers, or remove one timer.

After addtimer,I want to remove it after some time.
How to do this?

There are a few ways you can do this. You haven't said how you would define "after some time" but I'll give various methods ...

1. The simplest is to make a one-shot timer. This will fire once and then delete itself. This is handy if you only want to do something once, but in the future (eg. in 5 minutes).
   

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2. Next, you could make two timers, one which deletes the second one, like this:
   
   
World.addtimer "my_timer", 0, 0, 20, "drink water", 1, ""
World.addtimer "delete_my_timer", 0, 5, 0, "", 5, "delete_timer"

   
   The first timer (my_timer) fires every 20 seconds, and sends "drink water" to the MUD.
   
   The second timer (delete_my_timer) fires after 5 minutes, and is a one-shot timer (hence the flag of 5). It calls a script delete_timer.
   
   The script delete_timer would look like this:
   
   
sub delete_timer (timer_name)
world.deletetimer "my_timer"
end sub

   
   

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3. You could use a trigger or alias to delete the timer. A trigger might be used if you wanted to do it automatically when something happened, an alias if you wanted to do it yourself.
   
   In each case they would call a script like this:
   
   
sub OnDeleteTimer (strName, strLine, aryWildcards)
world.deletetimer "my_timer"
end sub

   

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4. If you have lots of such timers it gets slightly more complicated because then you need a way of knowing which timer to delete. I would then use a variable to remember which timer to delete.

Thanks a lot.