，php自动ping百度的然后.

求助，php自动ping百度的然后....
小弟有一个php的站，本来程序没有rss自动ping百度的功能，但是我想加一个，于是从网上找了段代码如下：

PHP code

<!--

Code highlighting produced by Actipro CodeHighlighter (freeware)
http://www.CodeHighlighter.com/

--><?php function postUrl($url, $postvar)
{
    $ch = curl_init();
    $headers = array(
        “POST “.$url.” HTTP/1.0″,
        “Content-type: text/xml; charset=\”utf-8\”",
        “Accept: text/xml”,
        “Content-length: “.strlen($postvar)
    );
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
    curl_setopt($ch, CURLOPT_POST, 1);
    curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
    curl_setopt($ch, CURLOPT_POSTFIELDS, $postvar);
    $res = curl_exec ($ch);
    curl_close ($ch);
    return $res;
}

$baiduXML = “<?xml version=\”1.0\” encoding=\”utf-8\”?>
   <methodcall>
   <methodname>weblogUpdates.extendedPing</methodname>
   <params>
   <param><value><string>$url</string></value>
   <param><value><string>$url</string></value>
   </params>
   </methodcall>”;
$res = postUrl(‘http://ping.baidu.com/ping/RPC2′, $baiduXML);
?>

然后....就没有然后了...
想问下各位大大，怎样才能最终实现这个RSS自动ping百度?求详细步骤，小弟是php菜鸟！

------解决方案--------------------

PHP code

function postUrl($url, $postvar)
{
    $ch = curl_init();
    $headers = array(
        "POST ".$url." HTTP/1.0",
        "Content-type: text/xml; charset=\”utf-8\"",
        "Accept: text/xml",
        "Content-length: ".strlen($postvar),
    );
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
    curl_setopt($ch, CURLOPT_POST, 1);
    curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
    curl_setopt($ch, CURLOPT_POSTFIELDS, $postvar);
    $res = curl_exec ($ch);
    curl_close ($ch);
    return $res;
}

$url = ''; //不知道这个值是什么
$baiduXML = "<?xml version=\"1.0\” encoding=\"utf-8\"?>
   <methodcall>
   <methodname>weblogUpdates.extendedPing</methodname>
   <params>
   <param><value><string>$url</string></value>
   <param><value><string>$url</string></value>
   </params>
   </methodcall>";
echo $res = postUrl('http://ping.baidu.com/ping/RPC2', $baiduXML); <div class="clear">
                 
              
              
        
            </div>