original_string: public function mb_str_to_lower($a)
      {
          return ($this->is_mb) ? mb_strtolower($a, $this->encoding) : strtolower($a);
      }
code: public function mb_str_to_lower($a)
      {
          return ($this->is_mb) ? mb_strtolower($a, $this->encoding) : strtolower($a);
      }
code_tokens: public function mb_str_to_lower ( $ a ) { return ( $ this -> is_mb ) ? mb_strtolower ( $ a , $ this -> encoding ) : strtolower ( $ a ) ; }
docstring: Is the PHP5 multibyte lib available?
docstring_tokens: Is the PHP5 multibyte lib available?