用 PHP 获取 Alexa Rank 、 Google PageRank 、 Sogou Rank 和 ChinaRank …… - 站长论坛

/**
* Rank class
*/
class Rank
{
// {{{ properties
/**
* Domain to process.
* @var string
*/
var $_domain = 'www.quchao.com';
/**
* Error Message.
* @var string
*/
var $_error = null;
// {{{ constructor
/**
* Constructor.
* @param string Domain to process
* @return void
*/
function Rank($domain = 'www.quchao.com')
{
if(preg_match('/^(?:[^\W_](?:[^\W_]|-){0,61}[^\W_]\.)+[a-zA-Z]{2,6}\.?$/', $domain)) {
$this->_domain = $domain;
} else {
$this->_error = 'Invalid Domain!';
}
}
// }}}
// {{{ destructor
/**
* Destructor.
* @return void
*/
function __destruct()
{
}
// }}}
// {{{ process()
/**
* Fetch the alexa rank.
* @param string Type of rank (alexa, google, sogou)
* @return mixed Rank value
*/
function process($type = 'alexa')
{
if(in_array(strtolower($type), array('alexa', 'google', 'sogou', 'chinarank'))) {
return $this->$type();
} else {
$this->_error = 'Non-supported Rank Type!';
return 0;
}
}
// }}}
// {{{ alexa()
/**
* Fetch the alexa rank.
* @return mixed Rank value
*/
function alexa()
{
$result = $this->fetch('http://data.alexa.com/data/+wQ411en8000lA?cli=10&dat=snba&ver=7.0&cdt=alx_vw%3D20%26wid%3D12206%26act%3D00000000000%26ss%3D1680x16t%3D0%26ttl%3D35371%26vis%3D1%26rq%3D4&url=' . urlencode($this->_domain));
if(preg_match('/TEXT=\"(\d+)\"\/>/', $result, $match)) {
return $match[1];
} else {
$this->_error = 'Failed to fetch alexa rank!';
return 0;
}
}
// }}}
// {{{ google()
/**
* Fetch the google rank.
* @return mixed Rank value
*/
function google()
{
$result = $this->fetch('http://www.google.com/search?client=navclient-auto&ch=6' . $this->GCH($this->strord('info:' . $this->_domain)) . '&ie=UTF-8&oe=UTF-8&features=Rank&q=info:' . urlencode($this->_domain));
if (preg_match('/\d+:\d+:(\d+)/', $result, $match)) {
return $match[1];
} else {
$this->_error = 'Failed to fetch google rank!';
return 0;
}
}
// }}}
// {{{ sogou()
/**
* Fetch the sogou rank.
* @return mixed Rank value
*/
function sogou()
{
$result = $this->fetch('http://www.sogou.com/web?query=link%3A' . urlencode($this->_domain));
if(preg_match('/<\/span>(\d+)<\/dd>/', $result, $match)) {
return $match[1];
} else {
$this->_error = 'Failed to fetch sogou rank!';
return 0;
}
}
// }}}
// {{{ chinarank()
/**
* Fetch the ChinaRank rank.
* @return mixed Rank value
*/
function chinarank()
{
list($msec, $sec) = split(' ', microtime());
$r = $sec . substr($msec, 2, 3);
$result = $this->fetch('http://www.chinarank.org.cn/overview/Info.do?url=' . urlencode($this->_domain) . '&r=' . $r);
if(preg_match('/class=\"domain\">(\d+)<\/span>/', $result, $match)) {
return $match[1];
} else {
$this->_error = 'Failed to fetch chinarank!';
return 0;
}
}
// }}}
// {{{ fetch()
/**
* Fetch the remote content.
* @param string URL of the page
* @return string Content of the page
*/
function fetch($url)
{
$content = '';
if(function_exists('curl_init')) {
//Curl Method
$handle = curl_init();
if(!$handle) {
return false;
}
curl_setopt($handle, CURLOPT_URL, $url);
curl_setopt($handle, CURLOPT_CONNECTTIMEOUT, 5);
curl_setopt($handle, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($handle, CURLOPT_FOLLOWLOCATION, 0);
$content = curl_exec($handle);
curl_close($handle);
} elseif(ini_get('allow_url_fopen')) {
//File Method
$handle = @fopen($url, 'r');
if(!$handle) {
return false;
}
while($buffer = fgets($handle, 4096)) {
$content .= $buffer;
}
fclose($handle);
} elseif(function_exists('fsockopen')) {
//Socket Method
$pos = strpos($url, '://');
$host = substr($url, $pos + 3, strpos($url, '/', $pos + 3) - $pos - 3);
$uri = substr($url, strpos($url, '/', $pos + 3));
$request = "GET " . $uri . " HTTP/1.1\r\n"
. "Host: " . $host . "\r\n"
. "Accept: */*\r\n"
. "User-Agent: Mozilla/4.0 (compatible; MSIE 5.5; Windows 98)\r\n"
. "\r\n";
$handle = @fsockopen($host, 80, $errno, $errstr, 30);
if(!$handle) {
return false;
}
@fputs($handle, $request);
while(!feof($handle)) {
$content .= fgets($handle, 4096);
}
fclose($handle);
$separator = strpos($content, "\r\n\r\n");
if($separator === false) {
return $content;
} else {
return substr($content, $separator + 4);
}
}
return $content;
}
// }}}
// {{{ strord()
function strord($string)
{
$strlen = strlen($string);
for($i = 0; $i < $strlen; $i++) {
$result[$i] = ord($string{$i});
}
return $result;
}
// }}}
// {{{ GCH()
function GCH($url, $length=null)
{
$length = sizeof($url);
$a = $b = 0x9E3779B9;
$c = 0xE6359A60;
$k = 0;
$len = $length;
while($len >= 12) {
$a += ($url[$k + 0] + ($url[$k + 1] << 8) + ($url[$k + 2] << 16) + ($url[$k + 3] << 24));
$b += ($url[$k + 4] + ($url[$k + 5] << 8) + ($url[$k + 6] << 16) + ($url[$k + 7] << 24));
$c += ($url[$k + 8] + ($url[$k + 9] << 8) + ($url[$k + 10] << 16) + ($url[$k + 11] << 24));
$mix = $this->mix($a, $b, $c);
$a = $mix[0];
$b = $mix[1];
$c = $mix[2];
$k += 12;
$len -= 12;
}
$c += $length;
//All the case statements fall through
switch($len) {
case 11: $c += ($url[$k + 10] << 24);
case 10: $c += ($url[$k + 9] << 16);
case 9 : $c += ($url[$k + 8] << 8);
//The first byte of c is reserved for the length
case 8 : $b += ($url[$k + 7] << 24);
case 7 : $b += ($url[$k + 6] << 16);
case 6 : $b += ($url[$k + 5] << 8);
case 5 : $b += ($url[$k + 4]);
case 4 : $a += ($url[$k + 3] << 24);
case 3 : $a += ($url[$k + 2] << 16);
case 2 : $a += ($url[$k + 1] << 8);
case 1 : $a += ($url[$k + 0]);
//Case 0: nothing left to add
}
$mix = $this->mix($a, $b, $c);
//Report the result
return $mix[2];
}
// }}}
// {{{ mix()
function mix($a, $b, $c){
$a -= $b;
$a -= $c;
$a ^= ($this->zeroFill($c, 13));
$b -= $c;
$b -= $a;
$b ^= ($a << 8);
$c -= $a;
$c -= $b;
$c ^= ($this->zeroFill($b, 13));
$a -= $b;
$a -= $c;
$a ^= ($this->zeroFill($c, 12));
$b -= $c;
$b -= $a;
$b ^= ($a << 16);
$c -= $a;
$c -= $b;
$c ^= ($this->zeroFill($b, 5));
$a -= $b;
$a -= $c;
$a ^= ($this->zeroFill($c, 3));
$b -= $c;
$b -= $a;
$b ^= ($a << 10);
$c -= $a;
$c -= $b;
$c ^= ($this->zeroFill($b, 15));
return array($a, $b, $c);
}
// }}}
// {{{ zeroFill()
function zeroFill($a, $b)
{
$z = hexdec(80000000);
if($z & $a) {
$a = ($a >> 1);
$a &= (~ $z);
$a |= 0x40000000;
$a = ($a >> ($b - 1));
} else{
$a = ($a>>$b);
}
return $a;
}
// }}}
}
?>

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