[Larceny]

Are you using zcmd, right?

You can use this:

pawn Code:

public OnPlayerCommandReceived(playerid, cmdtext[])// ZCMD's callback.
{
    //Example of condition \/-------------Example of command \/
    if( IsPlayerLogged(playerid) == 0 && strcmp(cmdtext, "/login", true) != 0)
        return SendClientMessage(playerid, -1, "You are not logged."), 0;
        //--------------------Example of messange /\

    return 1;
}