最近一直在忙友链,也乘机学习一下PR值相关知识,试着用PHP实现PR查询。
Google PR值是什么在此不做过多的介绍,简单的说就是你的PR值越高代表的你网站越重要越受欢迎,不过这个值最高为10,下面这个代码可以获得一个网站的PR值。
用PHP脚本程序获取网站的PR值的主要代码如下:
程序如下:
$googlehost="toolbarqueries.google.com";
$googleua="Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.0.6) Gecko/20060728 Firefox/1.5";
echo getpr
//convert a string to a 32-bit integer
function StrToNum($Str, $Check, $Magic) {
$Int32Unit = 4294967296; // 2^32
$length = strlen($Str);
for ($i = 0; $i
$Check *= $Magic;
//If the float is beyond the boundaries of integer (usually +/- 2.15e+9 = 2^31),
// the result of converting to integer is undefined
// refer to php.net/manual/en/language.types.integer.php
if ($Check >= $Int32Unit) {
$Check = ($Check - $Int32Unit * (int) ($Check / $Int32Unit));
//if the check less than -2^31
$Check = ($Check
}
$Check += ord($Str{$i});
}
return $Check;
}
//genearate a hash for a url
function HashURL($String) {
$Check1 = StrToNum($String, 0×1505, 0×21);
$Check2 = StrToNum($String, 0, 0×1003F);
$Check1 》= 2;
$Check1 = (($Check1 》 4) & 0×3FFFFC0 ) ($Check1 & 0×3F);
$Check1 = (($Check1 》 4) & 0×3FFC00 ) ($Check1 & 0×3FF);
$Check1 = (($Check1 》 4) & 0×3C000 ) ($Check1 & 0×3FFF);
$T1 = (((($Check1 & 0×3C0) 《 4) ($Check1 & 0×3C)) 《2 ) ($Check2 & 0xF0F );
$T2 = (((($Check1 & 0xFFFFC000) 《 4) ($Check1 & 0×3C00)) 《 0xA) ($Check2 & 0xF0F0000 );
return ($T1 $T2);
}
//genearate a checksum for the hash string
function CheckHash($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;
}