php 伪造HTTP_REFERER页面URL来源的三种方法

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

$ch = curl_init(); 
curl_set ($ch, CURLOPT_URL, "http://.manongjc."); 
curl_set ($ch, CURLOPT_REFERER, "http://.manongjc."); 
curl_exec ($ch); 
curl_close ($ch); 

$server = '.manongjc.'; 
$host = '.manongjc.'; 
$target = 'index.php'; 
$referer = 'http://.manongjc./'; // 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); 
}