PHP Token Generator v2

Token.php

<?php
/*
  Gist: PHP Token Generator v2
  Author: Gkiokan Sali
  Date: 2019-05-24
  Description: Generate a unique token with a special format.
*/

namespace App\Utils;

class Token {

      // Generates the Unique Token and returns it.
      public static function generate(){
          $val = sprintf( '%04x%04x-%04x-%04x-%04x-%04x%04x%04x',
                    mt_rand( 0, 0xffff ), mt_rand( 0, 0xffff ),
                    mt_rand( 0, 0xffff ),
                    mt_rand( 0, 0x0C2f ) | 0x4000,
                    mt_rand( 0, 0x3fff ) | 0x8000,
                    mt_rand( 0, 0x2Aff ), mt_rand( 0, 0xffD3 ), mt_rand( 0, 0xff4B )
                );
          return strtoupper($val);
      }


      public static function short(){
          $val = sprintf( '%04x%04x-%04x-%04x-%04x',
                    mt_rand( 0, 0xffff ), mt_rand( 0, 0xffff ),
                    mt_rand( 0, 0xffff ),
                    mt_rand( 0, 0x0C2f ) | 0x4000,
                    mt_rand( 0, 0x3fff ) | 0x8000
                    // mt_rand( 0, 0x2Aff ), mt_rand( 0, 0xffD3 ), mt_rand( 0, 0xff4B )
                );
          return strtoupper($val);
      }


      public static function mix(){
          $val = sprintf( '%04x-%03x-%07x-%02x',
                    mt_rand( 0, 0x2Aff ), mt_rand( 0, 0xffD3 ),
                    mt_rand( 0, 0xffff ),
                    mt_rand( 0, 0x0C2f ) | 0x4000,
                    mt_rand( 0, 0x3fff ) | 0x8000
                    // mt_rand( 0, 0x2Aff ), mt_rand( 0, 0xffD3 ), mt_rand( 0, 0xff4B )
                );
          return strtoupper($val);
      }


      public static function getString($length=12){
          $token = "";
          $codeAlphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
          $codeAlphabet.= "abcdefghijklmnopqrstuvwxyz";
          $codeAlphabet.= "0123456789";
          $max = strlen($codeAlphabet); // edited

         for ($i=0; $i < $length; $i++) {
             $token .= $codeAlphabet[random_int(0, $max-1)];
         }

         return strtoupper($token);
      }


      public static function getToken($length=12, $delimiter='-'){

          $token = self::getString($length);

          $key_partial_length = 6;
          $in_position = 4;
          $occurence = ($length / $in_position) - 1;

          $token = implode($delimiter, str_split($token, $key_partial_length));

          // for($i=0;$i<$occurence;$i++):
          //   $offset = $i * $in_position + $i * $in_position ;
          //   $token = $token = substr_replace($token, "-", $offset, 0);
          // endfor;

          // $token = substr_replace($token, "-", 4, 0);
          // $token = substr_replace($token, "-", 9, 0);
          // $token = substr_replace($token, "-", 14, 0);
          return $token;
      }


      public static function getSerial($partialCount=[4,3,7,2], $patchStartingHash=false){
          $keys = $patchStartingHash ? [strtoupper(sprintf('%04x', mt_rand( 0, 0x0C2f )))] : [];

          foreach($partialCount as $k => $length)
            $keys[] = self::getString($length);

          $token = implode('-', $keys);

          return $token;
      }

}