How to clear visitor ip log file every day?

programming
1

This is my counter code…

this will take unique visitors and the ip will be stored in the ip.db file…

But i need to know the visitors for each day…

ie. i have to clear the ip.db each 24 hrs… what to do for that???

counter.php

 <?php
 $ip = $_SERVER['REMOTE_ADDR'];
 
 $file_ip = fopen('counter/ip.db', 'rb');
 while (!feof($file_ip)) {
        $line[]=fgets($file_ip,1024);
    }
 for ($i=0; $i<(count($line)); $i++) {
  list($ip_x) = split("
",$line[$i]);
  if ($ip == $ip_x) {$found = 1;}
 }
 fclose($file_ip);
 
 if (!$found) {
  $file_ip2 = fopen('counter/ip.db', 'ab');
  $line = "$ip
";
  fwrite($file_ip2, $line, strlen($line));
  $file_count = fopen('counter/count.db', 'rb');
  $data = '';
  while (!feof($file_count)) {
   $data .= fread($file_count, 4096);
  }
  fclose($file_count);
  list($today, $yesterday, $total, $date, $days) = split("%", $data);
  if ($date == date("Y m d")) {
   $today++;
  } else {
   $yesterday = $today;
   $today = 1;
   $days++;
   $date = date("Y m d");
  }
  $total++;
  $line = "$today%$yesterday%$total%$date%$days";
 
  $file_count2 = fopen('counter/count.db', 'wb');
  fwrite($file_count2, $line, strlen($line));
  fclose($file_count2);
  fclose($file_ip2);
 }
?>

showcounter

<style type="text/css">
<!--
body,td,th {
 font-family: Verdana, Arial, Helvetica, sans-serif;
}
-->
</style>
<table width="237" border="0" cellpadding="5" cellspacing="5" bgcolor="#CCCCCC" style="border-collapse:collapse">
<tr>
<td width="161"><div align="left">
  <?php
$file_count = fopen('counter/count.db', 'rb');
 $data = '';
 while (!feof($file_count)) {
  $data .= fread($file_count, 4096);
 }
 fclose($file_count);
 list($today, $yesterday, $total, $date, $days) = split("%", $data);
 
?>
  You are visitor number </div></td>
<td width="8"><div align="left">:</div></td>
<td width="18">
  <div align="left" style="font-weight:bold"><?php
 echo $total;
?>
  </div></td>
</tr>
<tr>
<td><div align="left">Total visitors today</div></td>
<td><div align="left">
  <div align="left">:</div>
</div></td>
<td>
  <div align="left" style="font-weight:bold"><?php echo $today; ?></div></td>
</tr>
<tr>
<td><div align="left">Visitors yesterday</div></td>
<td><div align="left">
  <div align="left">:</div>
</div></td>
<td>
  <div align="left" style="font-weight:bold">
    <?php
 echo $yesterday;
?>
  </div></td>
</tr>
<tr>
<td><div align="left">Daily average</div></td>
<td><div align="left">
  <div align="left">:</div>
</div></td>
<td>
  <div align="left" style="font-weight:bold">
    <?php
 echo ceil($total/$days);
?>
  </div></td>
</tr>
</table>