Logfile über Webseitenbesuche

<?
// ip-sperre in sekunden (Standard 1Jahr)
$expire = 31536000;
$filename = "neu2/counter.txt";  

if (file_exists($filename)) 
{
   $ignore = false;
   $current_agent = (isset($_SERVER['HTTP_USER_AGENT'])) ? addslashes(trim($_SERVER['HTTP_USER_AGENT'])) : "no agent";  
   $current_time = date ("H:i:s");  
   $current_ip = $_SERVER['REMOTE_ADDR'];   
      
   // daten einlesen
   $c_file = array();
   $handle = fopen($filename, "r");  
   
   if ($handle)
   {
      while (!feof($handle)) 
      {
         $line = trim(fgets($handle, 4096)); 
		 if ($line != "")  
		    $c_file = $line;		  
      }
      fclose ($handle);
   }
   else
      $ignore = true;
   
   // bots ignorieren   
   if (substr_count($current_agent, "bot") > 0)  
      $ignore = true;
	  
   
   // hat diese ip einen eintrag in den letzten expire sec gehabt, dann igornieren?
   for ($i = 1; $i < sizeof($c_file); $i++)
   {
      list($counter_ip, $counter_time) = explode("||", $c_file[$i]);  
	  $counter_time = trim($counter_time);
	  
	  if ($counter_ip == $current_ip && $current_time-$expire < $counter_time)
	  {
	     // besucher wurde bereits gezählt, daher hier abbruch
		 $ignore = true;
		 break;
	  }
   }
   
   // counter hochzählen
   if ($ignore == false)
   {
      if (sizeof($c_file) == 0)
      {
	     // wenn counter leer, dann füllen      
		 $add_line1 = date("W") . "-1||" . date("d") . "-1||" . date("m") . "-1||" . date("Y") . "-1||" . $current_time . "||" . "1||1" . "\n";  
		 $add_line2 = $current_ip . "||" . date ("d.m.Y") . "||" . $current_time . "\n";  
		 
		 // daten schreiben
		 $fp = fopen($filename,"w+");  
		 if ($fp)
         {
		    flock($fp, LOCK_EX);
			fwrite($fp, $add_line1);
		    fwrite($fp, $add_line2);
			flock($fp, LOCK_UN);
		    fclose($fp);
		 }
		 
		 // werte zur verfügung stellen
		 $week = $day = $month = $year = $all = $record = 1;
		 $record_time = $current_time;
		 $online = 1;
	  }
      else
	  {
	     // counter hochzählen
		 list($week_arr, $day_arr, $month_arr, $year_arr, $record_time, $all, $record) = explode("||", $c_file);  
		
		 // week
		 $week_data = explode("-", $week_arr);  
		 $week = $week_data[1];
		 if ($week_data == date("W")) $week++; else $week = 1;  
		
		 // day
		 $day_data = explode("-", $day_arr);  
		 $day = $day_data[1];
		 if ($day_data == date("d")) $day++; else $day = 1;  
		  
		 // month
		 $month_data = explode("-", $month_arr);  
		 $month = $month_data[1];
		 if ($month_data == date("m")) $month++; else $month = 1;  
		 
		 // year
		 $year_data = explode("-", $year_arr);  
		 $year = $year_data[1];
		 if ($year_data == date("Y")) $year++; else $year = 1;  
		  
		 // all
		 $all++;
		 
		 // neuer record?
		 $record_time = trim($record_time);
		 if ($day > $record)
		 {
		    $record = $day;
			$record_time = $current_time;
		 }
		 
		 // speichern und aufräumen und anzahl der online leute bestimmen
		 
		 $online = 1;
		 
		 // daten schreiben
		 $fp = fopen($filename,"w+");  
		 if ($fp)
         {
		    flock($fp, LOCK_EX);
			$add_line1 = date("W") . "-" . $week . "||" . date("d") . "-" . $day . "||" . date("m") . "-" . $month . "||" . date("Y") . "-" . $year . "||" . $record_time . "||" . $all . "||" . $record . "\n" ;		   
		    fwrite($fp, $add_line1);
		 
		    for ($i = 1; $i < sizeof($c_file); $i++)
            {
               list($counter_ip, $counter_time) = explode("||", $c_file[$i]);  
	  
	           // übernehmen
		   	   if ($current_time-$expire < $counter_time)
	           {
	              $counter_time = trim($counter_time);
				  $add_line = $counter_ip . "||" . $counter_time . "\n";  
			      fwrite($fp, $add_line);
			      $online++;
	           }
            }
		    $add_line = $current_ip . "||" . $current_time . "\n";  
		    fwrite($fp, $add_line);
		    flock($fp, LOCK_UN);
		    fclose($fp);
	     }
	  }
   }
   else
   {
      // nur zum anzeigen lesen
	  if (sizeof($c_file) > 0)
	     list($week_arr, $day_arr, $month_arr, $year_arr, $record_time, $all, $record) = explode("||", $c_file);  
	  else
		 list($week_arr, $day_arr, $month_arr, $year_arr, $record_time, $all, $record) = explode("||", date("W") . "-1||" . date("d") . "-1||" . date("m") . "-1||" . date("Y") . "-1||" . $current_time . "||" . "1||1");  
	  
	  // week
	  $week_data = explode("-", $week_arr);  
	  $week = $week_data[1];
	  
	  // day
	  $day_data = explode("-", $day_arr);  
      $day = $day_data[1];
	  
	  // month
	  $month_data = explode("-", $month_arr);  
	  $month = $month_data[1];
	  
	  // year
	  $year_data = explode("-", $year_arr);  
	  $year = $year_data[1];
	  
	  $record_time = trim($record_time);
	  
	  $online = sizeof($c_file) - 1;
   }
?>
<table width="800" border="0" align="center" cellpadding="0" cellspacing="0">  
		<tr>
			<td colspan="2">  
	 			<p align="center">  
					<font face="Verdana" size="3"><br>		  
						 Sie sind der <? echo $all; ?> Besucher auf unserer Seite!	
					</font> 
				</p>
			</td>
		</tr>
</table>
<?
}
?>