[BiosMarcel]

You could do this:

PHP код:

new connectTick[MAX_PLAYERS];

public OnGameModeInit()
{
    SetTimer("paydaycheck", 3600000/*1 Hour*/, true);
}

public OnPlayerConnect(playerid)
{
    connectTick[playerid] = GetTickCount();
}

forward paydaycheck();
public paydaycheck()
{
    foreach(new player : Player)
    {
        new tickDifference = getTickDiff(GetTickCount(), connectTick[playerid]);

        if(tickDifference >= 1500000/*25 Minutes*/)
        {
            PAYDAY();
        }
    }
}

stock getTickDiff(newTick, oldTick) 
{ 
    if (oldTick < 0 && newTick >= 0) { 
        return newTick - oldTick; 
    } else if (oldTick >= 0 && newTick < 0 || oldTick > newTick) { 
        return (cellmax - oldTick + 1) - (cellmin - newTick); 
    } 
    return newTick - oldTick; 
} 


Hope i understood your needs.