不知道你注意了沒有,類似優酷、騰訊視頻等其他視頻連結似乎類似這樣的
複製代碼 代碼如下:
http://v.youku.com/v_show/id_XNjA5MjE5OTM2.html
注意id_xxx那段,是不是看不懂了,但你無可否認這個就是id,這不國外的一位牛人早在09年就寫了針對PHP/Python/Javascript/Java/SQL的產生方法,可見我現在是多麼的落伍,下面我把代碼貼出來,希望分享精神永存。
複製代碼 代碼如下:
<?php
/**
* @author Kevin van Zonneveld <kevin@vanzonneveld.net>
* @author Simon Franz
* @author Deadfish
* @copyright 2008 Kevin van Zonneveld (http://kevin.vanzonneveld.net)
* @license http://www.opensource.org/licenses/bsd-license.php New BSD Licence
* @version SVN: Release: $Id: alphaID.inc.php 344 2009-06-10 17:43:59Z kevin $
* @link http://kevin.vanzonneveld.net/
*
* @param mixed $in String or long input to translate
* @param boolean $to_num Reverses translation when true
* @param mixed $pad_up Number or boolean padds the result up to a specified length
* @param string $passKey Supplying a password makes it harder to calculate the original ID
*
* @return mixed string or long
*/
function alphaID($in, $to_num = false, $pad_up = false, $passKey = null)
{
$index = "abcdefghijklmnopqrstuvwxyz0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
if ($passKey !== null) {
// Although this function's purpose is to just make the
// ID short - and not so much secure,
// with this patch by Simon Franz (http://blog.snaky.org/)
// you can optionally supply a password to make it harder
// to calculate the corresponding numeric ID
for ($n = 0; $n<strlen($index); $n++) {
$i[] = substr( $index,$n ,1);
}
$passhash = hash('sha256',$passKey);
$passhash = (strlen($passhash) < strlen($index))
? hash('sha512',$passKey)
: $passhash;
for ($n=0; $n < strlen($index); $n++) {
$p[] = substr($passhash, $n ,1);
}
array_multisort($p, SORT_DESC, $i);
$index = implode($i);
}
$base = strlen($index);
if ($to_num) {
// Digital number < 0) {
$out -= pow($base, $pad_up);
}
}
$out = sprintf('%F', $out);
$out = substr($out, 0, strpos($out, '.'));
} else {
// Digital number -->> alphabet letter code
if (is_numeric($pad_up)) {
$pad_up--;
if ($pad_up > 0) {
$in += pow($base, $pad_up);
}
}
$out = "";
for ($t = floor(log($in, $base)); $t >= 0; $t--) {
$bcp = bcpow($base, $t);
$a = floor($in / $bcp) % $base;
$out = $out . substr($index, $a, 1);
$in = $in - ($a * $bcp);
}
$out = strrev($out); // reverse
}
return $out;
}
使用舉例
複製代碼 代碼如下:
<?php
alphaID(9007199254740989);
執行結果將被返回“fE2XnNGpF”,我們可以把它認為是加密,進行反解密則
複製代碼 代碼如下:
<?php
alphaID('fE2XnNGpF', true);
那麼就轉換成真實的數字“9007199254740989”。方法還可以支援使用key進行加密,使得別人無法解得你真實的ID。