[dice7]

Untested, but it should work

pawn Code:

public OnPlayerCommadText(playerid, cmdtext[])
{
  if(!strcmp("/makemeinvisible", cmdtext))
  {
    
    new a = GetMaxPlayers();
    for(new id = 0; id > a; id++)
    {
      if(!IsPlayerConnected) continue;
      ShowPlayerNameTagForPlayer( id, playerid, false );
      SetPlayerMarkerForPlayer( id, playerid, 0xFFFFFF00 );
    }
    SendClientMessage(playerid, color, "You are invisible to other players");
    return 1;
  }

  if(!strcmp("/makemevisible", cmdtext))
  {
    
    new a = GetMaxPlayers();
    for(new id = 0; id > a; id++)
    {
      if(!IsPlayerConnected) continue;
      ShowPlayerNameTagForPlayer( id, playerid, true );
      SetPlayerMarkerForPlayer( id, playerid, COLOR );
    }
    SendClientMessage(playerid, color, "You are visible to other players");
    return 1;
  }
  return 0;
}