Warning: Unknown: Your script possibly relies on a session side-effect which existed

Warning: Unknown: Your script possibly relies on a session side-effect which existed until PHP 4.2.3. Please be advised that the session extension does not consider global variables as a source of data, unless register_globals is enabled. You can disable this functionality and this warning by setting session.bug_compat_42 or session.bug_compat_warn to off, respectively. in Unknown on line 0

что это такое ? помогите решить проблему

<?php

  header("Expires: Mon, 23 May 1995 02:00:00 GMT");

  header("Last-Modified: ".gmdate("D, d M Y H:i:s")." GMT");

  header("Cache-Control: no-cache, must-revalidate");

  header("Pragma: no-cache");

  session_start();



  //

  include("functions.inc");

  //выбираем страницу

  $Page = $_POST['page'];

  if($Page == '')

    $Page = $_GET['page'];

  if($Page == '')

    $Page = 'categories';

//относительный путь

  $GetPath  = $_GET['path'];

  $Path     = str_replace("x", "/", $GetPath);

  //print $Path.'<br />';

//абсолютный путь

  //print $_SERVER['PHP_SELF'];

  $AbsPath = str_replace('/index.php', '', $_SERVER['PHP_SELF']);

  if($AbsPath != '')

    $AbsPath .= '/';



  $AbsPath = $Down.'cat';

  $AbsPath .= "{$Path}";

//предыдущий каталог

  if(strlen($Path) != 3)

    $PrevPath = substr($GetPath, 0, strlen($Path)-3);

//счетчик посещений категории

  $CatCounter = $_SESSION['CatCounter'];

  $CatCounter = unserialize($CatCounter);

  //if(empty($CatCounter)) $CatCounter[] = $Path;

  if(!@in_array($Path, $CatCounter))

  {

    $CatCounter[] = $Path;

    $Count = LoadFromFile("{$AbsPath}/counter.txt");

    $Count++;

    SaveStringInFile("{$AbsPath}/counter.txt", $Count, 'w');

  }

  $CatCounter = serialize($CatCounter);

  session_register('CatCounter');

  //переменные

  $Name = LoadFromFile($AbsPath."/name.txt");

  $UpAnchor = "<div align=center><a href='#' onclick=\"location.href = '/?path={$PrevPath}';\"><span class=mustred>Наверх</span></a></div>";

?>

<?

//подкатегории

  //страница для постраничной навигации

  $Part = $_GET['part'];  if(empty($Part)) $Part = 1;

  //составляем список каталогов с подкатегориями

  $dr = opendir($AbsPath);

  $TextCount = 0;

  while($dir = readdir($dr))

  {

    if((ereg("[0-9]+", $dir) == true) and (strpos($dir, 'text') === false))

      $Arr[] = $dir;

    elseif(strpos($dir, 'text') !== false)

      $TextCount++;

  }

  closedir($dr);

  if(!empty($Arr))

    sort($Arr);

  //получаем подкатегории: служебная директория, название, статус (многомерный массив $Categories)

  $ShowStatus[] = '';

  $inx = 0;

  for($i = 0; $i < count($Arr); $i++)

  {

    $CatDir = $Arr[$i];

    $Categories[$inx]['dir'] = $CatDir;

    $File = $AbsPath.'/'.$CatDir.'/name.txt';

    $CatName = LoadFromFile($File);

    $Categories[$inx]['name'] = $CatName;

    $Visibility = LoadFromFile($AbsPath.'/'.$CatDir.'/conf.txt');

    $Categories[$inx]['visib'] = $Visibility;

    $Descr = LoadFromFile($AbsPath.'/'.$CatDir.'/descr.txt');

    if(!empty($Descr))

      $Descr = " - ".$Descr;

    $Categories[$inx]['descr'] = '<i>'.$Descr.'</i>';

    //$Categories[$inx]['counter'] = LoadFromFile($AbsPath.'/'.$CatDir.'/counter.txt');

    $inx++;

    //статус: показывать/не показывать

  }



//заголовок активной категории



  print "<h1>{$Name}</h1>";

  if(!empty($Path))

    print $UpAnchor;



//Базовая нумерация

  if(!empty($Path))

  {

    $Num = str_replace('0', '',  $Path);

    $Num = str_replace('/', '.', $Num);

    $Num = substr($Num, 1, strlen($Num));

    $Num.= ".";

  }



//выводим подкатегории

  if(!empty($Categories))

  {

    $Count = count($Categories);

    $inx = 1;



    print "<table border='0' cellspacing='0' cellpadding='0' width='100%' class='CatList'>";

    for($i = 0; $i < $Count; $i++)

    {

      $TmpPath = "{$GetPath}x{$Categories[$i]['dir']}";

      if($Categories[$i]['visib'] != 0)

      {

        print "<tr>";

	        print "<td width=5 class=PaddingR valign=top>$Num{$inx}</td>";

	        print "<td class='CatItem'><a href='/food-{$TmpPath}.htm'>{$Categories[$i]['name']}</a>{$Categories[$i]['descr']}</td>";

	      print "</tr>";

        $inx++;

      }

    }

    print "</table>";

  }



  //Выбираем изображения

  $ImgDir = $AbsPath.'/img';

  $dr = opendir($ImgDir);

  $inx=0;

  while($file = readdir($dr))

  {

    if(strpos($file, 'min_') !== false)

    {

      $ImgBrief = substr($file, 4, (strlen($file)-4));

      $Images[$inx]['brief'] = trim($ImgBrief);

      $Images[$inx]['min'] = $ImgDir.'/'.$file;

      $MaxImg = $ImgDir.'/max_'.$ImgBrief;

     // print $MaxImg.'<br />';

      if(file_exists($MaxImg))

        $Images[$inx]['max'] = trim($MaxImg);

      $inx++;

    }

  }

  closedir($dr);

  //var_dump($Images);

//Подготавливаем текст

  $Dir = GetVSDir($_SERVER['PHP_SELF']);

  $Text = LoadFromFile($AbsPath."/text{$Part}.txt");

  $ToReplace = "<table align='center' class='OrdTableWithPadding' cellspacing='0' cellpadding='0' border='1'><tr>";

  $Text = str_replace('[IMAGES]', $ToReplace, $Text);

  $Text = str_replace('[/IMAGES]', '</tr></table>', $Text);

  $Text = ConvertBBCode($Text);

  $Count = count($Images);

  for($i = 0; $i < $Count; $i++)

  {

    $Brief = $Images[$i]['brief'];

    $Min   = $Images[$i]['min'];

    $Max   = $Images[$i]['max'];

    //print "$Brief - $Min - $Max<br />";

    if(empty($Max))

      $Text = str_replace("
    else

      $Text = str_replace("
    //картинка-ссылка на другой сайт

    $Text = str_replace("{$Brief}", "' target=_blank><img src='{$Min}' border='0'></a><br />", $Text);

  }

  $Text = str_replace("[IMGREF]
  $Text = str_replace('" title="", "<td class='ImageBox'><a href='", $Text);

  $Text = str_replace('[/IMGREF]', "</td>", $Text);

  $Text = str_replace('" target="_blank">", "<td class='ImageBox'><a href='", $Text);

  $Text = str_replace('[/IMGREF]', "</td>", $Text);

  $Text = str_replace('" />', "</td>", $Text);

//Постраничная навигация

  $Navig = create_navig ($Part, $TextCount);

  print "<br />";

  if(!empty($Navig))

  {

    print $Navig;

    print "<br />";

  }

  print $Text;

  print "<br />";

  print $Navig;" />