PHP僞造referer地址的三種方法

CURL方式：

$ch = curl_init();
 
curl_setopt ($ch, CURLOPT_URL, "http://www.yyyy.com");
 
curl_setopt ($ch, CURLOPT_REFERER, "http://www.xxxx.com/");
 
curl_exec ($ch);
 
curl_close ($ch);

 

SOCKET方式：

$server = 'www.yyyy.com';
 
$host = 'www.yyyy.com';
 
$target = 'index.php';
 
$referer = 'http://www.xxxx.com/'; // Referer
 
$port = 80;
 
$fp = fsockopen($server, $port, $errno, $errstr, 30);
 
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);
 
}

file_get_contents方法：

$opt=array('http'=>array('header'=>"Referer: $refer")); 
 
$context=stream_context_create($opt); 
 
$file_contents = file_get_contents($url,false, $context);

通過上面的代碼，我們就把referer地址僞裝爲http://www.xxxx.com，你可以寫一段代碼：

$_SERVER['HTTP_REFERER'];

查看到這個referer地址，就是這麼簡單，所以referer也不是什麼可靠的數據了。