我用gethostbyaddr('里面放ip');每次只返回ip而不是返回域名,貌似只有输入127.0.0.1才能返回域名,百度,和谷歌都不行,这个函数到底咋用呢!!!!function gethost ($ip)
{
return ( preg_match('/^(?:25[0-5]|2[0-4]\d|1\d\d|[1-9]\d|\d)(?:[.]
(?:25[0-5]|2[0-4]\d|1\d\d|[1-9]\d|\d)){3}$/', $ip) ) ? gethostbyaddr($ip) : false;}
{
return ( preg_match('/^(?:25[0-5]|2[0-4]\d|1\d\d|[1-9]\d|\d)(?:[.]
(?:25[0-5]|2[0-4]\d|1\d\d|[1-9]\d|\d)){3}$/', $ip) ) ? gethostbyaddr($ip) : false;}
function getContent($url){
$content=file_get_contents($url);
return $content;
}
function getResult($ip){
$pagesize=10;
$page=1;
$url="http://cn.bing.com/search?q=ip%3A$ip&first=$page";
$result=array();
do
{
$url="http://cn.bing.com/search?q=ip%3A$ip&first=$page";
$content=getContent($url);
$pattern="/<cite>([a-zA-Z0-9\.]*)(?:\/.*)?<\/cite>/isU";
preg_match_all($pattern, $content, $matches);
$result=array_merge($result,$matches[1]);
$nextpage=strpos($content, "下一页");
$page=$page+$pagesize;
}while($nextpage);
$result=array_values(array_unique($result));
return $result;
}
// 调用方法
$result=getResult("220.181.111.85");
//$result=getResult("117.79.93.222");//csdn
echo "<pre>";
print_r($result);Array
(
[0] => baidu.com
)