php实现帖子水军脚本

我想构造一个post表单将请求发到服务器端，实现自动留言功能，也就是所谓的水军，页面是http://www.cnblogs.com/shanyou/archive/2012/10/30/2746168.html，我想在这下面实现自动留言，下面是我写的代码，被服务器禁止了，Cookie我没放上来，太长了，求高人指点<?php$url = "http://www.cnblogs.com/mvc/PostComment/New.aspx";//post action 地址无法访问到$post_data['postId']=2746168;
$post_data['Body']="顶";
$post_data['ParentCommentID']=0;
foreach($post_data as $key => $value)
{
    $requestArray[] = $key.':'.urlencode($value);
}
$requestString    =    implode(",",$requestArray);
//url
$url_info    =    parse_url($url);if(!isset($url_info['port']))
{
    $url_info['port']    =    80;
    $request    =    "POST ".$url_info['path']." HTTP/1.1\n";
    $request    .=    "Host: ".$url_info['host']."\n";
    $request    .=    "Content-type: application/x-www-form-urlencoded\n";
     $request    .=    "Content-length: ".strlen($requestString)."\n";
    $request .= "Referer: http://www.cnblogs.com/shanyou/archive/2012/10/30/2746168.html\n";
    $request .="X-Requested-With :XMLHttpRequest\n";
    $request    .=    "Connection: close\n";
     $request    .=    "\n";
    $request    .=    $requestString."\n";
}$fp = fsockopen($url_info["host"], $url_info["port"]);
fputs($fp, $request);$inheader = 1;$result="";
while(!feof($fp)) 
{
    $result .= fgets($fp, 1024);
}echo "<pre>";
echo $result;
fclose($fp);
?>