如何用PHP获取网站收录的内容

这篇文章主要讲了如何用PHP获取网站收录的内容，有一定的参考价值，感兴趣的朋友可以看看。

<?php
class SEO_RankChecker
{
private $url;
public function __construct($url)
{
$this->url = preg_replace('/http\:\/\//si', '', $url);
}
private function getContent($url)
{
$snoopy=new Snoopy();
$snoopy->agent='Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US) AppleWebKit/534.7 (KHTML, like Gecko) Chrome/7.0.517.41 Safari/534.7';
$snoopy->fetch($url);
if($snoopy->status==200)
{
$charset='utf-8';
$snoopy->results=strtolower($snoopy->results);
//首先从html获取编码
preg_match("/<meta.+?charset=[^\w]?([-\w]+)/i",$snoopy->results,$temp) ? strtolower($temp[1]):"";
if(isset($temp[1])!="")
{
$charset=$temp[1]; 
}
else if(!empty($snoopy->headers))
{
//从header中获取编码
$hstr=strtolower(implode("|||",$snoopy->headers));
preg_match("/charset=[^\w]?([-\w]+)/is",$hstr,$lang) ? strtolower($lang[1]):"";
if($lang[1]!="")
{
$charset=$lang[1];
}
else
{
$encode_arr=array("UTF-8","GB2312","GBK","BIG5","ASCII","EUC-JP","Shift_JIS","CP936","ISO-8859-1","JIS","eucjp-win","sjis-win");
$encoded=mb_detect_encoding($snoopy->results,$encode_arr);
if($encoded)
{
$charset=strtolower($encoded);
}
}
}
else 
{
$encode_arr=array("UTF-8","GB2312","GBK","BIG5","ASCII","EUC-JP","Shift_JIS","CP936","ISO-8859-1","JIS","eucjp-win","sjis-win");
$encoded=mb_detect_encoding($snoopy->results,$encode_arr);
if($encoded)
{
$charset=strtolower($encoded);
}
}
if($charset!="utf-8" && $charset!==false)
{
$snoopy->results=mb_convert_encoding($snoopy->results,"UTF-8",$charset);
}
return $snoopy->results;
}
else 
{
return '';
}
}
//获取alexa排名
public function getAlexaRank()
{
$url = $this->url;
$xml = @simplexml_load_string(file_get_contents('http://data.alexa.com/data?cli=10&url=' . $url));
return $xml ? $xml->SD->POPULARITY['TEXT'] : '';
}
//如果被dmoz收录就返回dmoz的目录名称
public function getDmoz()
{
$url = preg_replace('/^www\./', '', $this->url);
$url = "http://search.dmoz.org/cgi-bin/search?search=$url";
$data = $this->getContent($url);
if(preg_match('<center>No <b><a href="http://dmoz\.org/">Open Directory Project</a></b> results found</center>', $data))
{
$value = false;
}
else
{
$value = true;
}
return $value;
}
//如果被yahoo收录就返回yahoo的目录名称
public function getYahooDirectory()
{
$url = preg_replace('/^www\./', '', $this->url);
$url = "http://search.yahoo.com/search/dir?p=$url";
$data = $this->getContent($url);
if(preg_match('No Directory Search results were found\.', $data)) {
$value = false;
} else {
$value = true;
}
return $value;
}
//获取Baidu收录
public function getIndexedBaidu()
{
$url = $this->url;
$url = 'http://www.baidu.com/s?wd=site%3A'.urlencode($url);
$data = $this->getContent($url);
preg_match('/找到相关结果数([0-9\,]+)个/si', $data, $p);
$value = isset($p[1]) ? $this->toInt($p[1]) : 0;
return $value;
}
//获取google收录
public function getIndexedGoogle()
{
$url = $this->url;
$url = 'http://www.google.com/search?hl=en&safe=off&btnG=Search&q=site%3A'.urlencode($url);
$data = $this->getContent($url);
preg_match('/([0-9\,]+) result/si', $data, $p);
$value = isset($p[1]) ? $this->toInt($p[1]) : 0;
return $value;
}
/**
*功能：获取Google反链 
*时间： 2011-10-13 下午11:28:45
*/
public function getBacklinksGoogle()
{
$url = $this->url;
$url = 'http://www.google.com/search?q=link%3A'.urlencode($url);
$data = $this->getContent($url);
preg_match('/of about \<b\>([0-9\,]+)\<\/b\>/si', $data, $p);
$value = isset($p[1]) ? $this->toInt($p[1]) : 0;
return $value;
}
/**
*功能：获取Yahoo反链 
*时间： 2011-10-13 下午11:28:45
*/
public function getBacklinksYahoo()
{
$url = $this->url;
$url = 'http://siteexplorer.search.yahoo.com/search?p='.urlencode($url);
$data = $this->getContent($url);
preg_match('/Inlinks \(([0-9\,]+)\)/si', $data, $p);
$value = isset($p[1]) ? $this->toInt($p[1]) : 0;
return $value;
}
//获取域名年龄
public function getAge()
{
$url = preg_replace('/^www\./', '', $this->url);
$url = 'http://www.who.is/whois/'.urlencode($url);
$data = $this->getContent($url);
preg_match('#(?:Creation Date|Created On):\s*([a-z0-9/-]+)#si', $data, $p);
if(!isset($p[1]))
{
return null;
}
$value = time() - strtotime($p[1]);
return $value;
}
//获取yahoo的收录数量
public function getIndexedYahoo()
{
$url = $this->url;
$url = 'http://siteexplorer.search.yahoo.com/search?p='.urlencode($url);
$data = $this->getContent($url);
preg_match('/Pages \(([0-9,]{1,})\)/im', $data, $p);
$value = isset($p[1]) ? $this->toInt($p[1]) : 0;
return $value;
}
/**
*功能：获取PR 
*时间： 2011-10-13 下午11:27:19
*/
public function getPagerank()
{
$chwrite = $this->CheckHash($this->HashURL($this->url));
$url="http://toolbarqueries.google.com/tbr?client=navclient-auto&ch=".$chwrite."&features=Rank&q=info:".$this->url."&num=100&filter=0";
$data = $this->getContent($url);
preg_match('#Rank_[0-9]:[0-9]:([0-9]+){1,}#si', $data, $p);
$value = isset($p[1]) ? $p[1] : 0;
return $value;
}
private function toInt($string)
{
return preg_replace('#[^0-9]#si', '', $string);
}
//--> for google Piwik_SEO_Ranks
private function StrToNum($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 $Check;
}
/*
* Genearate a hash for a url
*/
private function HashURL($String)
{
$Check1 = $this->StrToNum($String, 0x1505, 0x21);
$Check2 = $this->StrToNum($String, 0, 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 | $T2);
}
//--> for google Piwik_SEO_Ranks
/*
* genearate a checksum for the hash string
*/
private function CheckHash($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;
}
}
?>

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