[[XST]O_x]

pawn Код:

new lastSender[MAX_PLAYERS] = {INVALID_PLAYER_ID, ...};

CMD:pm(playerid, params[])
{
    //Add this at the end:
    lastSender[id] = playerid;
    return 1;
}

CMD:r(playerid, params[])
{
    new send_to = lastSender[playerid];
    
    //Now just send the pm to 'send_to'
    return 1;
}

Also make sure you put INVALID_PLAYER_ID in lastSender in OnPlayerConnect so it won't pass the id to a new player who joins