[Stinged]

You're using OnPlayerCommandText(playerid, cmdtext[])
So just replace return 0; at the end with "SendClientMessage(playerid, your color, "your message");"

But if you change to zcmd, delete all OnPlayerCommandText and add this to the script.

pawn Код:

public OnPlayerCommandPerformed(playerid, cmdtext[], success)
{
    if (!success)
        return SendClientMessage(playerid, your color, "your message");

    return 1;
}