public OnPlayerCommandText(playerid, cmdtext[])
{
    new cmd[256];
    new idx;
    cmd = strtok(cmdtext, idx);

    if(strcmp(cmd, "/teleport", true) == 0)
    {
        SetPlayerPos(playerid, 6584.6845, 6845.6845, 8645.546);
        SendClientMessage(playerid, COLOR_RED, "Hello!");
        return 1;
    }

    return 1;
}