Problems with Anti Leeching Script

adeydas8 · March 31, 2006

Hi!

I am trying to write an Anti Leeching script in PHP and have the following code:

[code]<?php
$referer=$_SERVER['HTTP_REFERER']; //Finds the referer and stores it into $referer

//Edit from here

//The following array contains the URL's from where the download can be accessed.
//Usually you should put the name of your site here along with any subdomains from where
//you want to allow files to be downloaded
//The format is:
//$sites[0]="http://example.com";
//$sites[1]="http://subdomain.example.com";
//$sites[2]="http://friendssite.com";
//and so on and so forth...

$sites[0]="http://example.com";
$sites[1]="http://www.example.com";
$sites[2]="http://subdomain.example.com";
$sites[3]="http://www.subdomain.example.com";
$sites[4]="http://localhost";

$last=4; //Change 4 to the last number in your array, i.e, the number in [] of $sites.
 // In the default file it is $sites[4]="http://localhost"; and our number is 4

$length=16; //Enter the length of the shortest URL. In the default file it is http://localhost and the
 //length of it is 16, so I have entered 16. Please remember to count the whole thing including
 //http:// and www. or ftp://

$folder="downloads/".$go; //Enter the name of the secret folder where you store your downloads

$anti_leech_page="anti_leech.php"; //Enter the file name of the page which you want to show if somebody
 //is caught leeching

$wrong_access="access.php"; //Enter the file name of the page which you want to show if the anti leeching
 //script is accessed directly

//Please don't edit beyond this point unless you know what you are doing

//Truncating the referer

$res=substr($referer,0,$length);

echo($res);

//Truncating the string of the URL's
for ($i=0; $i<=$last; $i++)
{
 $site[$i]=substr($sites[$i],0,$length);
}

/*
for ($k=0; $k<=$last; $k++)
{
 echo($site[$k]);
 echo(" ");
}
*/

//Checking whether HTTP_REFERER is NULL
if ($go=="")
{
 $dummy=$wrong_access;

}

 //If HTTP_REFERER is not NULL this happens
 for ($p=0; $p<=$last; $p++)
 {
 if ($site[$p]==$res)
 {
 $k=1;
 break;
 }
 else
 {
 $dummy=$anti_leech_page;
 }
 }

if ($k=1)
{
 $wer=$folder;
}
else
{
 $wer=$dummy;
}
echo($folder);
echo(" ");
echo($wer);
echo(" ");
echo($dummy);
echo(" ");
?>

<html>
<head>
<title>Abhishek's Anti Leeching Script</title>

</head>
<body>
Your download will begin in 1 seconds. If it dosen't start, please click <a href="<?php echo($wer); ?>" />here</a>. 
Referer is: <?php echo($referer); ?> 
</body>
</html>
[/code]

The output of this comes out as follows:
[!--quoteo--][div class=\'quotetop\']QUOTE[/div][div class=\'quotemain\'][!--quotec--]Notice: Undefined variable: go in C:\Program Files\Apache Group\Apache2\htdocs\abhishek\leech\go.php on line 28
[a href=\"http://localhost\" target=\"_blank\"]http://localhost[/a]
Notice: Undefined variable: go in C:\Program Files\Apache Group\Apache2\htdocs\abhishek\leech\go.php on line 61
downloads/
downloads/
anti_leech.php
Your download will begin in 1 seconds. If it dosen't start, please click here.

Referer is: [a href=\"http://localhost/abhishek/leech/main.php\" target=\"_blank\"]http://localhost/abhishek/leech/main.php[/a][/quote]

First of all, the value of $go is not recognised. Second, though [a href=\"http://localhost\" target=\"_blank\"]http://localhost[/a] exists in the array, still $dummy is given the value of $anti_leech_page.

Can you please help me out with this code.

Thank you.
Abhishek.

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