PHP obtains Google PR value algorithm and PHP query PR value code

/*
*Function: Encode URL
*Parameter description: $web_url website URL, does not contain "http://", such as jbxue.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{
$Result ^= ord($SEED{$i%87}) ^ ord($url{$i});
$Result = (($Result >> 23) & 0x1FF) | $Result << 9;
}
return sprintf("8%x", $Result);
}
/*
*Function: Get pagerank
*Parameter description: $domain website domain name, not Contains "http://",
*/
function pagerank($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;
}

Instructions: PR queries are sometimes a bit slow. Many PR query sites have various caches. Under normal circumstances, the PR value will not change unless Google PR is updated.