ban ips from txt file

[feanor]

		#!/usr/bin/php -q
<?php
 
$TxtDosyaYol="/pathto/ip.txt";
 
while(1)
{  
  echo "working";
  $IpListe=file_get_contents($TxtDosyaYol);
  $IpArray=explode("\n", $IpListe);
  for($i=0;$i<count($IpArray);$i++)
  {
    if(strlen($IpArray[$i])>5)
    { 
      $Komut="/sbin/iptables -A INPUT -s ".$IpArray[$i]." -j DROP";
      shell_exec($Komut);
    }  
  } 
  unlink($TxtDosyaYol);
  sleep(20); // wait 20 seconds
}  
 
?>	

it deletes ip.txt file when banned all ips , it works for me