[Max_Coldheart]

pawn Код:

new IsMuted[MAX_PLAYERS];

<-- on top of your script

pawn Код:

IsMuted[playerid] = 1; // In mute command

pawn Код:

public OnPlayerText(playerid, text)
{
    If(IsMuted[playerid] == 1)
    {
        SendClientMessage(playerid, -1, "You can't speak while muted");
     }
     Return 0;
}