我们知道百度搜索排序中快照的地址并非目标URL，而是一个baidu/link?url=xxx形式的地址，302跳转到目标URL，那么，我们可不可以加密直接给自己的URL生成一个这样的地址呢？
网上其实有很多研究的文章，给出的答案都是无法获知加密方式是不可能破解的，但是根据研究，可以实现生成一个类似的URL，并能实现跳转到目标页。下面是我从网上抄录的代码
PHP代码一
<html>
<head>
<meta http-equiv="content-type" content="text/html;charset=utf-8">
</head>
<body>
<?php
//$ascii码表x,y位置
$ascii = array(
0=>array(' ','!','"','#','$','%','&','\'','(',')','*','+',',','-','.','/'),
1=>array('0','1','2','3','4','5','6','7','8','9',':',';','<','=','>','?'),
2=>array('@','A','B','C','D','E','F','G','H','I','J','K','L','M','N','O'),
3=>array('P','Q','R','S','T','U','V','W','X','Y','Z','[','\\',']','^','_'),
4=>array('`','a','b','c','d','e','f','g','h','i','j','k','l','m','n','o'),
5=>array('p','q','r','s','t','u','v','w','x','y','z','{','|','}','~',' '),);
//url第N个位置对应的(x,y)，目前只得到80位的url
$data = array(
array(13,10),
array(10,1),
array(16,15),
array(7,6),
array(5,13),
array(18,9),
array(13,11),
array(7,12),
array(10,5),
array(15,9),
array(15,9),
array(13,5),
array(16,11),
array(0,1),
array(8,2),
array(8,5),
array(0,0),
array(17,15),
array(14,8),
array(2,1),
array(10,5),
array(17,14),
array(16,5),
array(3,8),
array(14,9),
array(5,8),
array(15,1),
array(3,15),
array(13,10),
array(10,12),
array(5,7),
array(0,2),
array(18,14),
array(0,15),
array(1,6),
array(13,5),
array(2,1),
array(15,14),
array(18,8),
array(18,9),
array(1,10),
array(14,14),
array(13,2),
array(5,3),
array(5,8),
array(0,4),
array(1,5),
array(16,1),
array(8,1),
array(2,5),
array(10,7),
array(10,15),
array(14,14),
array(17,3),
array(15,0),
array(14,5),
array(7,7),
array(3,4),
array(14,8),
array(12,0),
array(13,12),
array(12,3),
array(6,5),
array(3,1),
array(1,14),
array(5,4),
array(0,12),
array(7,0),
array(10,7),
array(15,12),
array(8,2),
array(18,15),
array(3,12),
array(1,12),
array(0,15),
array(17,4),
array(17,2),
array(11,1),
array(3,12),
array(11,5),
array(0,13),
array(1,1),
array(2,12)
);
//所有的y值
$y = array(
0=>
'0123456789abcdef',
'1032547698badcfe',
'23016745ab89efcd',
'32107654ba98fedc',
'45670123cdef89ab',
'54761032dcfe98ba',
'67452301efcdab89',
'76543210fedcba98',
'89abcdef01234567',
'98badcfe10325476',
'ab89efcd23016745',
'ba98fedc32107654',
'cdef89ab45670123',
'dcfe98ba54761032',
'efcdab8967452301',
'fedcba9876543210'
);
//所有的x值
$x = array(
0=>
'016745',
'107654',
'234567',
'321076',
'325476',
'452301',
'543210',
'670123',
'765432',
'761032',
'89abcd',
'89efcd',
'98fedc',
'abcdef',
'badcfe',
'cdab89',
'dcba98',
'ef89ab',
'fe98ba'
);
//解密过程：
$domain = "www.4xseo.com";
$len = strlen($domain);
for($i=0;$i<$len;$i++){
$domain_one = substr($domain,$i,1);//输出el
$arr_x = array('0','1','2','3','4','5','6','7','8','9','a','b','c','d','e','f');
$arr_y = array('0','1','2','3','4','5','6','7','8','9','a','b','c','d','e','f');
for($ax =0;$ax<sizeof($arr_x);$ax++){
for($ay =0;$ay<sizeof($arr_y);$ay++){
//读取每一组密文的x 和 y
$one = array($arr_x[$ax],$arr_y[$ay]);//str_split($v);
$encode_x = $one[0]; //f
$encode_y = $one[1]; //d
//得到第$k位的data
$this_data_x = str_split($x[$data[$i][0]]); // $data[$k]=13,10 [0] = $x[13]
$this_data_y = str_split($y[$data[$i][1]]); // $data[$k]=13,10 [1] = $y[10]
//得到在ascii码表的x,y
$real_x = array_search($encode_x,$this_data_x); //5
$real_y = array_search($encode_y,$this_data_y); //7 3
//结果
$result = $ascii[$real_x][$real_y];
if($result == $domain_one ){
$mi .= $arr_x[$ax].$arr_y[$ay];
$url .= $result;
echo '密文对应：'.$arr_x[$ax].$arr_y[$ay].'----'.$result."<br>";
break 2;
}
}
}
}
echo '密文对应：http://www.baidu.com/link?url=a3f48d30fc293c5e471ef23de092fddc99'.$mi.'----'.$url."<br>";
?>
</body>
</html>此代码与《什么是百度反推秒收录技术，原理怎么实现》文末给出的生成链接原理基本一致
PHP代码二
验证后获得的地址返回的是404，已经失效了，贴出来参考学习
<?php
$time = time().rand(1000,9999);
$data = "{$time}###http://www.4xseo.com"; // 被加密信息
$key = '4xseo.com'; // 密钥
$encrypt = encrypt($data, $key);
$decrypt = decrypt($encrypt, $key);
echo $encrypt, "\n", $decrypt;
function encrypt($data, $key)
{
$key = md5($key);
$x = 0;
$len = strlen($data);
$l = strlen($key);
for ($i = 0; $i < $len; $i++)
{
if ($x == $l)
{
$x = 0;
}
$char .= $key{$x};
$x++;
}
for ($i = 0; $i < $len; $i++)
{
$str .= chr(ord($data{$i}) + (ord($char{$i})) % 256);
}
return base64_encode($str);
}
function decrypt($data, $key)
{
$key = md5($key);
$x = 0;
$data = base64_decode($data);
$len = strlen($data);
$l = strlen($key);
for ($i = 0; $i < $len; $i++)
{
if ($x == $l)
{
$x = 0;
}
$char .= substr($key, $x, 1);
$x++;
}
for ($i = 0; $i < $len; $i++)
{
if (ord(substr($data, $i, 1)) < ord(substr($char, $i, 1)))
{
$str .= chr((ord(substr($data, $i, 1)) + 256) - ord(substr($char, $i, 1)));
}
else
{
$str .= chr(ord(substr($data, $i, 1)) - ord(substr($char, $i, 1)));
}
}
return $str;
} 以上代码来源《百度反推算法PHP代码》
转载请注明：思享SEO博客 » 生成百度加密地址baidu/link?url=PHP代码