Модель для парсинга FB2 на PHP

Вот решил написать парсер для FB2 на PHP, может несколько коряво - торопился, однако работает. В дальнейшем думаю изменять и дополнять .

/**
 * 
 * @author			Diz A Torr
 * @copyright		Copyright (c) 2010, CodeMotion
 * @license			GPL
 * @link			http:/conferdigit.ru
 * @since			Version 1.0
 * @filesource
 */
// ------------------------------------------------------------------------

class fictionbook{
    var $book;
    var $table_of_content = array();
    var $book_info = array();
    
    function book_load ($file){
        $this->book = simplexml_load_file ($file);
        $this->title_info();
    }
    
    function title_info (){
        $title_info = 'title-info';
        include ('ru-ru.php');
	    foreach ($this->book->description->$title_info->children() as $key=>$children){
	        switch ($key){
                case 'genre':
                    $this->book_info['genre'][] = $genre_table_ru[(string) $children]; break;
                case 'book-title':
                    $this->book_info['book-title'] = $children; break;
                case 'author': //Автор(ы) произведения
			        $last_name = 'last-name';
			        $first_name = 'first-name';
			        $middle_name = 'middle-name';
			        $home_page = 'home-page';
			        $this->book_info['author'][] = array (   'first-name'=>$children->$first_name, 
			                                                'middle-name'=>$children->$middle_name, 
			                                                'last-name'=>$children->$last_name, 
			                                                'home-page'=>$children->$home_page, 
			                                                'email'=>$children->email);
                break;
                case 'annotation':
                    $this->book_info['annotation'] = $children->asXML(); break;
                case 'coverpage':
                    $this->book_info['coverpage'] = $children->image; break;
                case 'date': // хранит дату создания документа.
                    $this->book_info['date'] = $children; break;
                case 'translator': //Переводчик(и)
			        $last_name = 'last-name';
			        $first_name = 'first-name';
			        $middle_name = 'middle-name';
			        $home_page = 'home-page';
			        $this->book_info['translator'][] = array (   'first-name'=>$children->$first_name, 
			                                                'middle-name'=>$children->$middle_name, 
			                                                'last-name'=>$children->$last_name, 
			                                                'home-page'=>$children->$home_page, 
			                                                'email'=>$children->email);
                break;
                case 'lang': //Язык книги
                    $this->book_info['lang'] = $children; break;
                case 'year': // год издания книги.
                    $this->book_info['year'] = $children; break;                    
                
	        }
	    }
	    $this->table_of_content = $this->table_of_content();
    }
    
    function print_image ($image){
        //print_r($image);
        $image =  $image->asXML();
		preg_match("/[\"|\']\#([\S]+\.[\S]+)[\"|\']/i", $image, $image_name);
		$image_name = $image_name[1];
       	foreach ($this->book->binary as $binary){
       	    if ($binary[id] == $image_name){
       	        $image = base64_decode($binary);
       	        $file = fopen($image_name, 'w');
       	        fwrite($file, $image);
       	        fclose($file);
       	        echo '';
       	    }
	    }        
    }
    
    function table_of_content($book='false'){ //Надо было как-то отметить, что в начале читать с самого начала , при этом не задавая это явно в методе.
        if (!empty($this->table_of_content)){return $this->table_of_content;}         //Проверка на наличие
        if ($book == 'false'){$book = $this->book->body;}
        foreach ($book as $key=>$body){
            if (isset($body->title)){
                $title = $this->__clear_string($body->title->asXML());
                if (!empty($title)){
                    //echo $title.'
';
                    $title_array[] = $title;                    
                }
            }
            $title_array_temp = $this->table_of_content($body->section);
            if (!empty($title_array_temp)){$title_array[] = $title_array_temp;}
        }
        return $title_array;
    }

    function content($book='false',  $i=-1){
        if ($book == 'false'){$book = $this->book->body;}
        ++$i;
        foreach ($book->children() as $key=>$body){
            switch ($key){
                case 'image': 
                    $this->print_image ($body);
                break;
                case 'title':
                    if ($i == 0){$i=1;}
                    $title = $this->__clear_string($body->asXML());
                    echo ''.$title.'';
                break;
                case 'section': 
                    $this->content($body, $i);
                break;
                case 'epigraph':
                    echo '
'.$this->__clear_string($body->asXML()).'
';
                break;
                default:
                echo $this->__clear_string($body->asXML(), false);
            }
        }
    }
    
    function print_table_of_content($table = false){
        if (!$table){$table = $this->table_of_content;
        }
        echo '
';
        foreach ($table as $row){
            if (is_array($row)){
                $this->print_table_of_content($row);
            }else{
                echo '
'.$row.'
';
            }
        }
        echo '
';
    }
        
    private function __clear_string ($string, $p = true){
        $string = preg_replace('/\|\<\/title\>/im', '', $string); //|\|\<\/p\>
        $string = preg_replace('/\s+/m', " ", $string);
        $string = preg_replace('/^\s+|\s+$/', '', $string);
        if ($p){$string = preg_replace('/\|\<\/p\>/im', '', $string);}
        return $string;
    }

}
$book = new fictionbook;
$book->book_load("12.fb2");
//echo '
';
$book->print_table_of_content();
$book->content();
?>