[JesterlJoker]

PHP код:

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


or you could just do this though.

and I'll just fix one command you'll get the rest

PHP код:

CMD:disablechat(playerid)
{
    if(PlayerInfo[playerid][Admin] < 6) return SendClientMessage(playerid, 0xFF0000AA, "You're not authorized to use that command!");
    if(chattoggled[playerid] == true)
    {
        chattoggled[playerid] = false;
        SendClientMessageToAll(0x00FFFFFF, "AdmCmd: An administrator has disabled the chat");
    }
    else SendClientMessage(playerid, 0xFFFF00FF, "Chat is already disabled");
    return 1;
}