$xpath = new DOMXPath( $html );
$url_info = array();
$langs = $xpath->query( '//html' );
foreach ($langs as $lang)
{
  $url_info['language'] = $lang->getAttribute('lang');
}
$<a href="https://www.jb51.cc/tag/Meta/" target="_blank" class="keywords">Meta</a>s = $xpath->query( '//<a href="https://www.jb51.cc/tag/Meta/" target="_blank" class="keywords">Meta</a>' );
foreach ($<a href="https://www.jb51.cc/tag/Meta/" target="_blank" class="keywords">Meta</a>s as $<a href="https://www.jb51.cc/tag/Meta/" target="_blank" class="keywords">Meta</a>)
{
  if ($<a href="https://www.jb51.cc/tag/Meta/" target="_blank" class="keywords">Meta</a>->getAttribute('name'))
  {
    $url_info[$<a href="https://www.jb51.cc/tag/Meta/" target="_blank" class="keywords">Meta</a>->getAttribute('name')] = $<a href="https://www.jb51.cc/tag/Meta/" target="_blank" class="keywords">Meta</a>->getAttribute('content');
  }
}
return $url_info;

}
/**

• Alexa rank
• @param string $url
• @return integer
  /
  public static function alexa_rank($url)
  {
  $domain = self::domain_name($url);
  $request = "http://data.alexa.com/data?cli=10&dat=s&url=" . $domain;
  $data = self::get_html($request);
  preg_match('/<POPULARITY URL="(.?)" TEXT="([\d]+)"\/>/si',$data,$p);
  return ($l[2]) ? $l[2] : NULL;
  }
  /**
• Alexa inbounds link
• @param string $url
• @return integer
  */
  public static function alexa_links($url)
  {
  $domain = self::domain_name($url);
  $request = "http://data.alexa.com/data?cli=10&amp;dat=s&amp;url=" . $domain;
  $data = self::get_html($request);
  preg_match('/<LINKSIN NUM="([\d]+)"\/>/si',$l);
  return ($l[1]) ? $l[1] : NULL;
  }
  /**
• Returns total amount of results for any Google search,* requesting the deprecated Websearch API.
• @param string $query String,containing the search query.
• @return integer Returns a total count.
  */
  public static function google_pages($url)
  {
  //$query = self::domain_name($url);
  $url = 'http://ajax.googleapis.com/ajax/services/search/web?v=1.0&rsz=1&q='.$url;
  $str = self::get_html($url);
  $data = json_decode($str);
  return (!isset($data->responseData->cursor->estimatedResultCount))
  ? '0'
  : intval($data->responseData->cursor->estimatedResultCount);
  }
  /**
• gets the inbounds links from a site
• @param string $url
• @param integer
  */
  public static function google_links($url)
  {
  $request = "http://www.google.com/search?q=" . urlencode("link:" . $url) . "&hl=en";
  $data = self::get_html($request);
  preg_match('/
  (About )?([\d,]+) result/si',$l);
  return ($l[2]) ? $l[2] : NULL;
  }
  /**
• web of trust rating
• @param string $url
• @reutn integer
  */
  public static function WOT_rating($url)
  {
  $domain = self::domain_name($url);
  $request = "http://api.mywot.com/0.4/public_query2?target=" . $domain;
  $data = self::get_html($request);
  preg_match_all('/<application name="(\d+)" r="(\d+)" c="(\d+)"\/>/si',$regs);
  $trustworthiness = ($regs[2][0]) ? $regs[2][0] : NULL;
  return (is_numeric($trustworthiness))? $trustworthiness:NULL;
  }

/**

• how old is the domain?
• @param string $domain
• @return integer unixtime
  */
  public static function domain_age($domain)
  {
  $request = "http://reports.internic.net/cgi/whois?whois_nic=" . $domain . "&type=domain";
  $data = self::get_html($request);
  preg_match('/Creation Date: ([a-z0-9-]+)/si',$p);
  return (!$p[1])?FALSE:strtotime($p[1]);
  }
  /**
• counts how many tweets about the url
• @param string $url
• @return integer
  */
  public static function tweet_count($url)
  {
  $url = urlencode($url);
  $twitterEndpoint = "http://urls.api.twitter.com/1/urls/count.json?url=%s";
  $fileData = file_get_contents(sprintf($twitterEndpoint,$url));
  $json = json_decode($fileData,true);
  unset($fileData); // free memory
  return (is_numeric($json['count']))? $json['count']:NULL;
  }
  /**
• Returns the total amount of Facebook Shares for a single page
• @link https://graph.facebook.com/
• @param string The URL to check.
• @return integer Returns the total amount of Facebook
  */
  public static function facebook_shares($q)
  {
  //Execution and result of Json
  $str = self::get_html('http://graph.facebook.com/?id='.urlencode($q));
  $data = json_decode($str);
  //Return only number of facebook shares
  $r = $data->shares;
  return ($r != NULL) ? $r : intval('0');
  }
  /**
• get the pagespeed rank over 100
• @param string $url
• @return integer
  */
  public static function page_speed($url)
  {
  $url = 'https://developers.google.com/_apps/pagespeed/run_pagespeed?url='.$url.'&format=json';
  $str = self::get_html($url);
  $data = json_decode($str);
  return intval($data->results->score);
  }
  /**
• get google page rank
• @param string $url
• @return integer
  */
  public static function page_rank($url)
  {
  $query = "http://toolbarqueries.google.com/tbr?client=navclient-auto&ch=".self::CheckHash(self::HashURL($url)). "&features=Rank&q=info:".$url."&num=100&filter=0";
  $data = self::get_html($query);//die(printr($data));
  $pos = strpos($data,"Rank");
  if($pos === false)
  {
  return NULL;
  }
  else
  {
  $pagerank = substr($data,$pos + 9);
  return $pagerank;
  }
  }
  // functions for google pagerank
  /**
• To calculate PR functions
  /
  public static function StrToNum($Str,$Check,$Magic)
  {
  $Int32Unit = 4294967296; // 2^32
  $length = strlen($Str);
  for ($i = 0; $i < $length; $i++) {
  $Check = $Magic;
  //If the float is beyond the boundaries of integer (usually +/- 2.15e+9 = 2^31),// the result of converting to integer is undefined
  // refer to http://www.php.net/manual/en/language.types.integer.php
  if ($Check >= $Int32Unit) {
  $Check = ($Check - $Int32Unit * (int) ($Check / $Int32Unit));
  //if the check less than -2^31
  $Check = ($Check < -2147483648) ? ($Check + $Int32Unit) : $Check;
  }
  $Check += ord($Str{$i});
  }
  return $Check;
  }
  /**
• Genearate a hash for a url
  */
  public static function HashURL($String)
  {
  $Check1 = self::StrToNum($String,0x1505,0x21);
  $Check2 = self::StrToNum($String,0x1003F);
  $Check1 >>= 2;
  $Check1 = (($Check1 >> 4) & 0x3FFFFC0 ) | ($Check1 & 0x3F);
  $Check1 = (($Check1 >> 4) & 0x3FFC00 ) | ($Check1 & 0x3FF);
  $Check1 = (($Check1 >> 4) & 0x3C000 ) | ($Check1 & 0x3FFF);
  $T1 = (((($Check1 & 0x3C0) << 4) | ($Check1 & 0x3C)) <<2 ) | ($Check2 & 0xF0F );
  $T2 = (((($Check1 & 0xFFFFC000) << 4) | ($Check1 & 0x3C00)) << 0xA) | ($Check2 & 0xF0F0000 );
  return ($T1 | $T2);
  }
  /**
• genearate a checksum for the hash string
  */
  public static function CheckHash($Hashnum)
  {
  $CheckByte = 0;
  $Flag = 0;
  $HashStr = sprintf('%u',$Hashnum) ;
  $length = strlen($HashStr);
  for ($i = $length - 1; $i >= 0; $i --) {
  $Re = $HashStr{$i};
  if (1 === ($Flag % 2)) {
  $Re += $Re;
  $Re = (int)($Re / 10) + ($Re % 10);
  }
  $CheckByte += $Re;
  $Flag ++;
  }
  $CheckByte %= 10;
  if (0 !== $CheckByte) {
  $CheckByte = 10 - $CheckByte;
  if (1 === ($Flag % 2) ) {
  if (1 === ($CheckByte % 2)) {
  $CheckByte += 9;
  }
  $CheckByte >>= 1;
  }
  }
  return '7'.$CheckByte.$HashStr;
  }
  }