original_string: private static function _encodeQuotedPrintable($str)
      {
          $str = str_replace('=', '=3D', $str);
          $str = str_replace(self::$qpKeys, self::$qpReplaceValues, $str);
          $str = rtrim($str);
          return $str;
      }
code: private static function _encodeQuotedPrintable($str)
      {
          $str = str_replace('=', '=3D', $str);
          $str = str_replace(self::$qpKeys, self::$qpReplaceValues, $str);
          $str = rtrim($str);
          return $str;
      }
code_tokens: private static function _encodeQuotedPrintable ( $ str ) { $ str = str_replace ( '=' , '=3D' , $ str ) ; $ str = str_replace ( self :: $ qpKeys , self :: $ qpReplaceValues , $ str ) ; $ str = rtrim ( $ str ) ; return $ str ; }
docstring: Converts a string into quoted printable format.
  
  @param  string $str
  @return string
docstring_tokens: Converts a string into quoted printable format .