[Scenario]

To call code inside the OnPlayerDisconnect callback, it would have to be like this:

pawn Код:

public OnPlayerDisconnect(playerid, reason)
{
   if(IsPlayerLoggedIn(playerid)) SaveChar(playerid);
   return 1;
}

Otherwise, this would work too:

pawn Код:

public OnPlayerDisconnect(playerid, reason)
{
   SaveChar(playerid);
   return 1;
}