代码实例：
PHP 8.5.5
PHP 8.5.5 是 PHP 8.5 分支的维护更新版本。该版本延续了“小步快跑”的迭代逻辑，通过深度错误修复、底层性能微调以及安全加固，旨在为开发者提供一个更健壮、更高效的运行环境。该版本严格遵守语义化版本规范，不包含破坏性变更。
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<?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 = "<?xml version=\"1.0\" encoding=\"gb2312\"?>
weblogUpdates.extendedPing
愚人渡 http://www.php.net http://www.php.net/read.php?tid-96.html http://www.php.net
";
$res = postUrl('http://ping.baidu.com/ping/RPC2', $baiduXML);
if ( strpos($res, "0 ") )
{
echo "PING成功";
}else{
echo "PING失败";
}
?>