利用google获取二级域名

<?php
header("Content-Type: text/html;charset=utf-8");
set_time_limit(0);
error_reporting(E_ERROR);

function geturl($keywords, $page, $num)
{
        $page = ($page - 1) * 10;
        $content = file_get_contents("http://www.google.com/search?sclient=psy-ab&hl=en&start=$page&source=hp&q=$keywords&pbx=1&oq=$keywords&num=$num&aq=f&aqi=g4");
        $preg = '/<h3\s*class="r"\s*>.*/im';
        preg_match_all($preg, $content, $m);
        preg_match_all('/<a(.*?)>(.*?)/', $m[0][0], $ms);

        $list = array();
        foreach ($ms[1] as $link)
        {
                preg_match('/http:\/\/[a-zA-Z0-9._-]*/', $link, $matches);
                if (!empty($matches[0]))
                {
                        $list[] = $matches[0];
                }
        }
        $list = array_unique($list);
        return $list;
}

www.zzzyk.com

    echo<<<INFO
----------------------------------
Google Get DNS Info T00l
blog:hi.baidu.com/nginxshell \n
Usage:\n PHP $argv[0] \n
Example:\n site:baidu.com -inurl:zhidao.\n
----------------------------------\n
INFO;

if(file_exists('site.txt')){
@unlink('site.txt');
@unlink('tmp');
echo "Clear Cache Success！\r\n";
}

echo "Please Enter GoogleDork: ";
$GOOGLEDORK = urlencode(fgets(STDIN));
#echo $GOOGLEDORK;
#exit();
$page = 10;
$num = 100;
for ($i=1;$i<=$page;$i++)
{
        $url = geturl($GOOGLEDORK, $i, $num);
        print_r('Page: '.$i.' Results Count: '.count($url)."\r\n");
           foreach ($url as $u)
           {
               print_r($u."\r\n");
              @$fp=@fopen('tmp','a');