original_string: public function base64Encode($number)
      {
          if ($number < 0 || $number > 63) {
              throw new \Exception(sprintf('Invalid number "%s" given. Must be between 0 and 63.', $number));
          }
  
          return $this->intToCharMap[$number];
      }
code: public function base64Encode($number)
      {
          if ($number < 0 || $number > 63) {
              throw new \Exception(sprintf('Invalid number "%s" given. Must be between 0 and 63.', $number));
          }
  
          return $this->intToCharMap[$number];
      }
code_tokens: public function base64Encode ( $ number ) { if ( $ number < 0 || $ number > 63 ) { throw new \ Exception ( sprintf ( 'Invalid number "%s" given. Must be between 0 and 63.' , $ number ) ) ; } return $ this -> intToCharMap [ $ number ] ; }
docstring: Encode single 6-bit digit as base64.
  
  @param integer $number
  
  @return string
  
  @throws \Exception If the number is invalid
docstring_tokens: Encode single 6 - bit digit as base64 .