[[D]ry[D]esert]

here to to dissable chat
on the top of your script

pawn Код:

new Chat = 1;

pawn Код:

public OnPlayerCommandText(playerid, cmdtext[])
{
    if(!strcmp(cmdtext, "/chat", true))
    {
        if(IsPlayerAdmin(playerid))
        {
        if(Chat == 0)
        {
        Chat = 1;
        SendClientMessage(playerid, 0xFFFFFFFF, "chat enabled");
        }
        if(Chat == 1)
        {
        Chat = 0;
        SendClientMessage(playerid, 0xFFFFFFFF, "chat disable");
        }
        }
    }
    return 0;
}

pawn Код:

public OnPlayerText(playerid, text[])
{
  if(Chat == 0) return 0;
}