The latest Google PR value algorithm is obtained with php attached is the code sample of php query PR value

 
/* 
* function : right URL coding  
* Parameters that :$web_url  Web site URL , does not contain "http://", For example, ofstack.com 
*/ 
function HashURL($url){ 
$SEED = "Mining PageRank is AGAINST GOOGLE'S TERMS OF SERVICE. Yes, I'm talking to you, scammer."; 
$Result = 0x01020345; 
for ($i=0; $i<strlen($url); $i++) 
{ 
$Result ^= ord($SEED{$i%87}) ^ ord($url{$i}); 
$Result = (($Result >> 23) & 0x1FF) | $Result << 9; 
} 
return sprintf("8%x", $Result); 
} 
/* 
* function : To obtain pagerank 
* Parameters that :$domain  Domain name, not included "http://", 
*/ 
function pagerank($domain) 
{ 
$StartURL = "http://toolbarqueries.google.com/tbr?client=navclient-auto&features=Rank:&q=info:"; 
// $StartURL = "http://www.google.com/search?client=navclient-auto&features=Rank:&q=info:"; 
$GoogleURL = $StartURL.$domain. '&ch='.HashURL($domain); 
$fcontents = file_get_contents("$GoogleURL"); 
$pagerank = substr($fcontents,9); 
if (!$pagerank) return "0";else return $pagerank; 
} 

I wrote the PR query tool is such, but there is a point to explain, PR sometimes query a bit slow, some people say why other people's site query is very fast, in fact, a lot of PR query sites have done a variety of caching, because PR1 like the case, will not change, unless Google PR update, ha ha.