PHP forged http_referer page URL source of three ways _php instance

PHP get the current page of the previous page URL address, that is, the current page from which page chain received, you can use $_server[' http_referer '], but this source page URL address can be forged and deceived, this article to introduce the forgery of HTTP_ Referer page URL of the three ways, the need for friends can refer to.

$_server[' Http_referer ' is a super variable that PHP uses to determine the page's superior source, and we can use $_server[' http_referer ' to determine from which page we are entering this page, So we can do a better job of tracking.

But $_server[' http_referer ' can also be forged and deceived, and there are three ways to forge and deceive $_server[' http_referer '

The first method: File_get_contents

$opt =array (' http ' =>array (' header ' => ' Referer: $refer ')); 
$context =stream_context_create ($opt); 
$file _contents = file_get_contents ($url, False, $context);

In file_get_contents, stream_context_create the important parameters for forging the source.

The second method: CURL

$ch = Curl_init (); 
curl_setopt ($ch, Curlopt_url, "http://www.manongjc.com"); 
curl_setopt ($ch, Curlopt_referer, "http://www.manongjc.com"); 
Curl_exec ($ch); 

Parameter http://www.manongjc.com is a spoofed URL address.

The third method: Fsockopen

$server = ' www.manongjc.com '; 
$host = ' www.manongjc.com '; 
$target = ' index.php '; 
$referer = ' http://www.manongjc.com/'; Referer 
$port =; 
$fp = Fsockopen ($server, $port, $errno, $errstr,); 
if (! $fp) { 
 echo $errstr ($errno) \ n "; 
} else{ 
$out = "Get $target http/1.1\r\n"; 
$out. = "Host: $host \ r \ n"; 
$out. = "Referer: $referer \ r \ n"; 
$out. = "connection:close\r\n\r\n"; 
Fwrite ($fp, $out); 
while (!feof ($fp)) { 
echo fgets ($FP, 128); 
} 
Fclose ($FP); 
 
 

Of the top three methods, the third method is best fsockopen performance and effectiveness, so it is recommended that you use a third method.

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