application/Base64Url.php

   1 <?php
   2
   3 namespace Shaarli;
   4
   5
   6 /**
   7  * URL-safe Base64 operations
   8  *
   9  * @see https://en.wikipedia.org/wiki/Base64#URL_applications
  10  */
  11 class Base64Url
  12 {
  13     /**
  14      * Base64Url-encodes data
  15      *
  16      * @param string $data Data to encode
  17      *
  18      * @return string Base64Url-encoded data
  19      */
  20     public static function encode($data) {
  21         return rtrim(strtr(base64_encode($data), '+/', '-_'), '=');
  22     }
  23
  24     /**
  25      * Decodes Base64Url-encoded data
  26      *
  27      * @param string $data Data to decode
  28      *
  29      * @return string Decoded data
  30      */
  31     public static function decode($data) {
  32         return base64_decode(str_pad(strtr($data, '-_', '+/'), strlen($data) % 4, '=', STR_PAD_RIGHT));
  33     }
  34 }