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  $reply = array();
  if ( strlen($_COOKIE['sid']) == 18 ) {
    $reply = query("SELECT code FROM sessions WHERE sid='".escape($_COOKIE['sid'],'str')."' AND ipaddr='".getipaddr()."'");
  }
  
  $userinfo = null;
  if ( count($reply) != 0 ) {  
    $reply = query("SELECT * FROM users WHERE code=".$reply[0][0]);
	if ( count($reply) != 0 ) { $userinfo = $reply[0][0]; }
  }

  if ( ($userinfo == null) && ( ($_GET['main'] == 'messager') || ($_GET['main'] == 'create') || ($_GET['main'] == 'huntlist') || ($_GET['main'] == 'speedlist') || ($_GET['main'] == 'control') || ($_GET['main'] == 'profile') || ($_GET['main'] == 'newmsg') || ($_GET['main'] == 'setlist') ) ) {
    error($msg_invalidSID);
  }