用PHP伪造来路信息

function getUrl($address, $myip) {   
    ob_start();   
    $mtime = explode(' ', microtime());   
    $starttime = $mtime[1] + $mtime[0];   
  
    $onoff = (function_exists('ini_get')) ? ini_get('register_globals') : get_cfg_var('register_globals');   
  
    if($onoff != 1) {   
        @extract($_POST, EXTR_SKIP);   
        @extract($_GET, EXTR_SKIP);   
    }   
  
    $self = $_SERVER['PHP_SELF'];   
    $myaddress = 'http://'.$_SERVER['HTTP_HOST'].$self;   
  
    $comm = '';   
  
    if(isset($url) && $url) {   
        $url = str_replace($address, '', $url);   
    }   
    /*  
    foreach($_POST as $key => $val) {  
    if($comm == '') {  
    $comm = $key.'='.rawurlencode($val);  
    } else {  
    $comm = $comm.'&'.$key.'='.rawurlencode($val);  
    }  
    }  
    */  
    $pcomm = '';   
    foreach($_POST as $key => $val) {   
        if($pcomm == '') {   
            $pcomm .= $key.''.urlencode($val);   
        } else {   
            $pcomm .= $pcomm.'&'.$key.'='.urlencode($val);   
        }   
    }   
  
    foreach($_GET as $key => $val) {   
        if($key != 'url') {   
            if($comm == '') {   
                $comm = $key.'='.rawurlencode($val);   
            } else {   
                $comm = $comm.'&'.$key.'='.rawurlencode($val);   
            }   
        }   
    }   
  
    if(!$url) {   
        $url = $address;   
    } else {   
        $url = $address.$url;   
        if($comm) {   
            if(strstr($url,'?')) {   
                $url = $url.'&'.$comm;   
            } else {   
                $url = $url.'?'.$comm;   
            }   
        }   
    }   
  
    if($url) {   
        $cookies= '';   
        if(count($_COOKIE)) {   
            foreach($_COOKIE as $cookie_name => $cookie_var) {   
                $cookies .= $cookies != '' ? '; '.$cookie_name.'='.$cookie_var : $cookie_name.'='.$cookie_var;   
            }   
        }   
  
        $temp = @parse_url($url);   
        $temp['port'] = isset($temp['port']) ? $temp['port'] : 80;   
        $temp['path'] = isset($temp['path']) ? $temp['path'] : '/';   
        $temp['file'] = substr($temp['path'], strrpos($temp['path'], '/')+1);   
        $temp['dir'] = substr($temp['path'], 0, strrpos($temp['path'], '/'));   
        $temp['base'] = $temp['scheme'].'://'.$temp['host'].($temp['port'] != 80 ? ':'.$temp['port'] : '').$temp['dir'];   
        $temp['prev_dir'] = $temp['path'] != '/' ? substr($temp['base'], 0, strrpos($temp['base'], '/')+1) : $temp['base'].'/';   
        $fp = @fsockopen($temp['host'], $temp['port'], $errno, $errstr, 30);   
        if($fp) {   
            if($_SERVER['REQUEST_METHOD'] != 'POST') {   
                @fputs($fp, "GET $temp[path]?$temp[query] HTTP/1.1\r\n");   
            } else {   
                @fputs($fp, "POST $temp[path]?$temp[query] HTTP/1.1\r\n");   
            }   
            @fputs($fp, "Host: $temp[host]\r\n");   
            @fputs($fp, "Accept: */*\r\n");   
            @fputs($fp, "Referer: http://$temp[host]/\r\n");   
            @fputs($fp, "Cookie: $cookies\r\n");   
            @fputs($fp, "User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)\r\n");   
            @fputs($fp, "via: 1.1 JEJE1:80 (squid/2.5.STABLE4-NT-CVS)\r\n");   
            @fputs($fp, "X-Forwarded-For: $myip\r\n");   
            if($_SERVER['REQUEST_METHOD'] == 'POST') {   
                @fputs($fp, "Content-Type: application/x-www-form-urlencoded\r\n");   
                @fputs($fp, "Content-Length: ".strlen($pcomm)."\r\n\r\n");   
                @fputs($fp, $pcomm);   
            }   
            @fputs($fp, "Connection: Close\r\n\r\n");   
  
            while($str = @fread($fp, 4096)) {   
  
                if($str != "\r\n" && preg_match_all("#set-cookie:([^\r\n]*)#i", $str, $matches)) {   
                    foreach($matches[1] as $cookie_info) {   
                        preg_match('#^\s*([^=;,\s]*)=?([^;,\s]*)#', $cookie_info, $match) && list(, $name, $value) = $match;   
                        preg_match('#;\s*expires\s*=([^;]*)#i', $cookie_info, $match) && list(, $expires) = $match;   
                        $expires = isset($expires) ? strtotime($expires) : false;   
                        $expires = (!is_numeric($expires) || time()> $expires) ? false : $expires;   
                        setcookie($name, $value, $expires);   
                    }   
                    $str = str_replace($matches[0], '', $str);   
                }   
  
                $Content .= $str;   
            }   
            @fclose($fp);   
            if(strpos($Content, 'Content-Type: text/html')) {   
                $Content = substr($Content, strpos($Content, 'Content-Type: text/html')+33);   
            } else {   
                $Content = substr($Content, strpos($Content, chr(0x0d).chr(0x0a).chr(0x0d).chr(0x0a))+4);   
            }   
            $Content = str_replace(' href="',' href="'.$myaddress.'?url=',$Content);   
            $Content = str_replace(' href=\'',' href=\''.$myaddress.'?url=',$Content);   
            $Content = str_replace(' src="',' src="'.$myaddress.'?url=',$Content);   
            $Content = str_replace(' src=\'',' src=\''.$myaddress.'?url=',$Content);   
            $Content = str_replace(' src=image',' src="'.$myaddress.'?url=image',$Content);   
            $Content = str_replace(' src=customavatars/',' src='.$myaddress.'?url=customavatars/',$Content);   
            $Content = str_replace(' action="',' action="'.$myaddress.'?url=',$Content);   
            $Content = str_replace(' url("',' url("'.$myaddress.'?url=',$Content);   
            $Content = str_replace(' background="',' background="'.$myaddress.'?url=',$Content);   
            $Content = str_replace(' url(\'',' url(\''.$myaddress.'?url=',$Content);   
            $Content = str_replace($myaddress.'?url=javascript:','javascript:',$Content);   
            $Content = str_replace(';url=',';url='.$myaddress.'?url=',$Content);   
            return $Content;   
        }   
    }   
    return false;   
}   
$myIP = rand(0, 255) . '.' . rand(0, 255) . '.' . rand(0, 255) . '.' . rand(0, 255);   
echo getUrl('http://www.ip138.com/ip2city.asp', $myIP);