如何实现将php的id加密的问题

2020-03-22 19:07:01
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 ?php * article url:http://kvz.io/blog/2009/06/10/create-short-ids-with-php-like-youtube-or-tinyurl/ * Translates a number to a short alhanumeric version * Translated any number up to 9007199254740992 * to a shorter version in letters e.g.: * 9007199254740989 -- PpQXn7COf * specifiying the second argument true, it will * translate back e.g.: * PpQXn7COf -- 9007199254740989 * this function is based on any2dec dec2any by * fragmer[at]mail[dot]ru * see: http://nl3.php.net/manual/en/function.base-convert.php#52450 * If you want the alphaID to be at least 3 letter long, use the * $pad_up = 3 argument * In most cases this is better than totally random ID generators * because this can easily avoid duplicate ID s. * For example if you correlate the alpha ID to an auto incrementing ID * in your database, you re done. * The reverse is done because it makes it slightly more cryptic, * but it also makes it easier to spread lots of IDs in different * directories on your filesystem. Example: * $part1 = substr($alpha_id,0,1); * $part2 = substr($alpha_id,1,1); * $part3 = substr($alpha_id,2,strlen($alpha_id)); * $destindir = / .$part1. / .$part2. / .$part3; * // by reversing, directories are more evenly spread out. The * // first 26 directories already occupy 26 main levels * more info on limitation: * - http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-talk/165372 * if you really need this for bigger numbers you probably have to look * at things like: http://theserverpages.com/php/manual/en/ref.bc.php * or: http://theserverpages.com/php/manual/en/ref.gmp.php * but I haven t really dugg into this. If you have more info on those * matters feel free to leave a comment. * The following code block can be utilized by PEAR s Testing_DocTest * code  * // Input // * $number_in = 2188847690240; * $alpha_in = SpQXn7Cb  * // Execute // * $alpha_out = alphaID($number_in, false, 8); * $number_out = alphaID($alpha_in, true, 8); * if ($number_in != $number_out) { * echo Conversion failure, .$alpha_in. returns .$number_out. instead of the  * echo desired: .$number_in. /n  * if ($alpha_in != $alpha_out) { * echo Conversion failure, .$number_in. returns .$alpha_out. instead of the  * echo desired: .$alpha_in. /n  * // Show // * echo $number_out. = .$alpha_out. /n  * echo $alpha_in. = .$number_out. /n  * echo alphaID(238328, false). = .alphaID(alphaID(238328, false), true). /n  * // expects: * // 2188847690240 = SpQXn7Cb * // SpQXn7Cb = 2188847690240 * // aaab = 238328 * /code  * @author Kevin van Zonneveld kevin@vanzonneveld.net  * @author Simon Franz * @author Deadfish * @author SK83RJOSH * @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 $pass_key Supplying a password makes it harder to calculate the original ID * @return mixed string or longfunction alphaID($in, $to_num = false, $pad_up = false, $pass_key = null) $out =  $index = abcdefghijklmnopqrstuvwxyz0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ  $base = strlen($index); if ($pass_key !== null) { // Although this function s purpose is to just make the // ID short - and not so much secure, // with this patch by Simon Franz (http://blog.snaky.org/) // you can optionally supply a password to make it harder // to calculate the corresponding numeric ID for ($n = 0; $n strlen($index); $n++) { $i[] = substr($index, $n, 1); $pass_hash = hash( sha256 ,$pass_key); $pass_hash = (strlen($pass_hash) strlen($index) ? hash( sha512 , $pass_key) : $pass_hash); for ($n = 0; $n strlen($index); $n++) { $p[] = substr($pass_hash, $n, 1); array_multisort($p, SORT_DESC, $i); $index = implode($i); if ($to_num) { // Digital number -- alphabet letter code $len = strlen($in) - 1; for ($t = $len; $t $t--) { $bcp = bcpow($base, $len - $t); $out = $out + strpos($index, substr($in, $t, 1)) * $bcp; if (is_numeric($pad_up)) { $pad_up--; if ($pad_up 0) { $out -= pow($base, $pad_up); } else { // Digital number -- alphabet letter code if (is_numeric($pad_up)) { $pad_up--; if ($pad_up 0) { $in += pow($base, $pad_up); for ($t = ($in != 0 ? floor(log($in, $base)) : 0); $t $t--) { $bcp = bcpow($base, $t); $a = floor($in / $bcp) % $base; $out = $out . substr($index, $a, 1); $in = $in - ($a * $bcp); return $out;}