[Toreno]

Just use SendClientMessage(playerid, COLOR, "Message");
Example:
On top of your script...

pawn Код:

#define COLOR_WHITE 0xFFFFFFAA

Then inside on player command text...

pawn Код:

public OnPlayerCommandText(playerid, cmdtext[])
{
    if(strcmp("/help",cmdtext ,true ,5) == 0)
    {
        SendClientMessage(playerid, COLOR_WHITE, "This is a test server,we only have /rf and /kill scripted manually");
        return 1;
    }
    return 0; // Returns : "SERVER: Uknown command" else nothing.
}