代码实例：

<?php function postUrl($url, $postvar) { $ch = curl_init(); $headers = array( "POST".$url."HTTP/1.0", "Content-type: text/xml; charset="gb2312"", "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 = "<"1.0" encoding="gb2312"?> <methodCall> <methodName>weblogUpdates.extendedPing</methodName> <params> <param><value><string>愚人渡</string></value></param> <param><value><string>http://www.jb51.net</string></value></param> <param><value><string>http://www.jb51.net/read.php?tid-96.html</string></value></param> <param><value><string>http://www.jb51.net</string></value></param> </params> </methodCall>"; $res = postUrl('http://ping.baidu.com/ping/RPC2', $baiduXML); if ( strpos($res, "<int>0</int>") ) { echo "PING成功"; }else{ echo "PING失败"; } ?>