PHP to turn the number of Word ID to the letter Id

PHP transfers the numeric ID to the letter Id

PHP transfers the numeric ID to the letter Id

ID is a frequent occurrence of the site, it is generally a number, but we found that many of the current site ID are letters, such as YouTube's video playback page its URL is similar to/WATCH?V=YZNJIBEDYWW. Here's a way to generate a letter ID.
Examples of Use:

echo Alphaid (12354);  Qnd  Echo alphaid (' Qnd ', true);//12354  Echo Alphaid (12354,false,6);//qndaab  

Source:

  PPQXN7COF * * Specifiying The second argument true, it'll * translate back e.g.: * PPQXN7COF-9007199254740989 * * This function was based on Any2dec && dec2any by * Fragmer[at]mail[dot]ru * see:http://nl3.php.net/manual/en/fun ction.base-convert.php#52450 * * If you want the alphaid to being at least 3 letter long, use the * $pad _up = 3 Argument * * In the most cases the better than totally random ID generators * Because this can easily avoid duplicate ID ' s. * For example if your correlate the Alpha ID to a auto incrementing ID * in your database, your ' re done. * * The reverse is do 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: * $part 1 = substr ($alpha _id,0,1); * $part 2 = substr ($alpha _id,1,1); * $part 3 = substr ($alpha _id,2,strlen ($alpha _id)); * $destindir = "/". $part 1. " /". $part 2." /". $part 3; *//By reversing, directories is more evenly spread out. The *//First 26Directories already occupy to main levels * * More info on limitation: *-HTTP://BLADE.NAGAOKAUT.AC.JP/CGI-BIN/SCAT.RB/RU by/ruby-talk/165372 * * If you really need this for bigger numbers you probably has to look * at things like:http://thes erverpages.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 had more info on those * matters feel free to leave a comment. * * @author Kevin van Zonneveld <[email protected]> * @author Simon Franz * @author deadfish * @copyright 20 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.V anzonneveld.net/* * @param mixed $in String or long input to translate * @param boolean $to _num reverses Translatio n When True * @param mixed $pad _up number or Boolean Padds tHe result up to a specified length * @param string $passKey supplying a password makes it harder to calculate the Origina L ID * * @return mixed string or long */function alphaid ($in, $to _num = False, $pad _up = false, $passKey = null) {$index  = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"; if ($passKey!== null) {//Although this function ' s purpose are to just make the//ID Short-and don't so much secur E,//With this patch by Simon Franz (http://blog.snaky.org/)//You can optionally supply a password to make it har Der/To calculate the corresponding numeric ID for ($n = 0; $n
 
  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;}
 

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