A piece of PHP code for anti-theft connection_PHP tutorial

$ADMIN[defaulturl] = http://www.163.com/404.htm; //The address returned by the hotlink
$okaysites = array("http://www.163.com/","http ://163.com") ; //Whitelist
$ADMIN[url_1] = http://www.163.com/download/; //Download location 1
$ADMIN[url_2] = " ";//Download location 2, and so on

$reffer = $HTTP_REFERER;
if($reffer) {
$yes = 0;
while(list($domain, $subarray) = each($okaysites)) {
if (ereg($subarray,"$reffer")) {
$yes = 1;
}
}
$theu = "url"."_"."$site";
if ($ADMIN[$theu] AND $yes == 1) {
header("Location: $ADMIN[$theu]/$file" );
} else {
header("Location: $ADMIN[defaulturl]");
}
} else {
header("Location: $ADMIN[defaulturl]");
}

?>


Usage: Save the above code as dao4.php,
For example, the test validatecode.rar is on the site http:// In 163.com/download,
uses the following code to represent the download link.

File name?site=1&file=file