[PHP]Checking total characters online[HELP]

How would I check the total characters online a Conquer Private Server?

Thanks in advance.

Use a MUS manager in the application and have a php script request the number from the manager and echo it. That's the best way I can think of other then timestamps.

Servers generally have a table with users online, what tables you have?

There is a table in the Accounts category called Online.

0 = Offline
1 = Online

How would I get the total number of Onlines?

SELECT COUNT(online) FROM accounts WHERE online = 1