bu scriptteki sorun nedır

<?php
define('GOOGLE_MAGIC', 0xE6359A60);

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;
}


function mix($a,$b,$c) {
$a -= $b; $a -= $c; $a ^= (zeroFill($c,13));
$b -= $c; $b -= $a; $b ^= ($a<<8);
$c -= $a; $c -= $b; $c ^= (zeroFill($b,13));
$a -= $b; $a -= $c; $a ^= (zeroFill($c,12));
$b -= $c; $b -= $a; $b ^= ($a<<16);
$c -= $a; $c -= $b; $c ^= (zeroFill($b,5));
$a -= $b; $a -= $c; $a ^= (zeroFill($c,3));
$b -= $c; $b -= $a; $b ^= ($a<<10);
$c -= $a; $c -= $b; $c ^= (zeroFill($b,15));

return array($a,$b,$c);
}

function GoogleCH($adres, $length=null, $init=GOOGLE_MAGIC) {
if(is_null($length)) {
$length = sizeof($adres);
}
$a = $b = 0x9E3779B9;
$c = $init;
$k = 0;
$len = $length;
while($len >= 12) {
$a += ($adres[$k+0] +($adres[$k+1]<<8) +($adres[$k+2]<<16) +($adres[$k+3]<<24));
$b += ($adres[$k+4] +($adres[$k+5]<<8) +($adres[$k+6]<<16) +($adres[$k+7]<<24));
$c += ($adres[$k+8] +($adres[$k+9]<<8) +($adres[$k+10]<<16)+($adres[$k+11]<<24));
$mix = mix($a,$b,$c);
$a = $mix[0]; $b = $mix[1]; $c = $mix[2];
$k += 12;
$len -= 12;
}

$c += $length;
switch($len)
{
case 11: $c+=($adres[$k+10]<<24);
case 10: $c+=($adres[$k+9]<<16);
case 9 : $c+=($adres[$k+8]<<8);

case 8 : $b+=($adres[$k+7]<<24);
case 7 : $b+=($adres[$k+6]<<16);
case 6 : $b+=($adres[$k+5]<<8);
case 5 : $b+=($adres[$k+4]);
case 4 : $a+=($adres[$k+3]<<24);
case 3 : $a+=($adres[$k+2]<<16);
case 2 : $a+=($adres[$k+1]<<8);
case 1 : $a+=($adres[$k+0]);

}
$mix = mix($a,$b,$c);

return $mix[2];
}


function strord($string) {
for($i=0;$i<strlen($string);$i++) {
$result[$i] = ord($string{$i});
}
return $result;
}

function getrank($adres) {
/*$adres = 'info:'.$adres;
$ch = GoogleCH(strord($adres));
$file = "http://www.google.com/search?client=navclient-auto&ch=6$ch&features=Rank&q=$adres";
$data = file($file);
$rankarray = explode (':', $data[2]);
$rank = $rankarray[2];
return $rank;*/
}
//$pr=getrank($url);


?>