[Inn0cent]

Код:

public OnPlayerLogin(playerid, password) 
{
  Give a MySQL query to load a time online of player from the db then set it to variable.
  playerOnline[playerid] = Data Fetched from the DB;
  curronline[playerid] = gettime(); 
}
public OnPlayerDisconnect(playerid, password) 
{
   new time_new = playerOnline[playerid] + (gettime() - curronline[playerid]);
   And give a MySQL query to save a time online of a player.
   And it will save the time in milliseconds. 
}