Help With Php Script

Trying to implement the following php script that i found at php.net. My question how to mod the following script so that it redirects the users to index.php page if it is found that the ip is black listed.

$result=Array();
$dnsbl_check=array("bl.spamcop.net",
"list.dsbl.org",
"sbl.spamhaus.org");
if ($ip)
{
$quads=explode(".",$ip);
$rip=$quads[3].".".$quads[2].".".$quads.".".$quads[0];
for ($i=0; $i<count($dnsbl_check); $i++)
{
if (checkdnsrr($rip.".".$dnsbl_check[$i].".","A"))
{
$result1[]=Array($dnsbl_check[$i],$rip.".".$dnsbl_check[$i]);
}
}
}
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if you havn't produced any HTML output yet, you can use

header("Location:/path/to/new/location.php");

Code (markup):

 

where exactly would i place that with in the code?

 

Something like :

<?php
$ip = getenv("REMOTE_ADDR");
function is_blacklisted($ip) {
   $dnsbl_check=array("bl.spamcop.net",
                       "list.dsbl.org",
                       "sbl.spamhaus.org");
   if ($ip) {
       $quads=explode(".",$ip);
       $rip=$quads[3].".".$quads[2].".".$quads[1].".".$quads[0];
       for ($i=0; $i<count($dnsbl_check); $i++) {
           if (checkdnsrr($rip.".".$dnsbl_check[$i],"A")) {
               $listed.=$dnsbl_check[$i]." ";
           }
         }
       if ($listed) { return $listed; } else { return FALSE; }
   }
}
$j=is_blacklisted($ip);
if ($j)
{
header("Location:/index.php");
}
else {
//do something else 
}
?>

PHP:

 

^^^ Exactly. You just need to do it when the ip is registered as a blacklisted ip. If that doesn't work, IE you get an error message that sais "HEADERS ALREADY SENT..." something like that, you can use this code instead.

It is through javascript, but it still works.

echo "<script language="javascript">location.href='/path/to/file/file.php';</script>";

PHP:

 

BTW this wont work anyway :

header("Location:/index.php");

PHP:

The correct one is

header("Location: /index.php");

PHP:

Check the space between : and /

 

As a side note, according to HTTP 1.1 specification, the url should be absolute.

 

Yeah that's right, but it will work with a relative url in any browser anyway

 

Indeed it will, just mentioned that for standard freaks out there.

 

well I did test that before I posted it so ... what's your verdict ?

 

The verdict is go with what works!