php-gtk2 GtkTextIter or GtkTextBuffer

Hi list , Ok now i can insert text on a GtkTextView <snip full => http://ciz.ch/svnciz/new_php_gtk2/xmleditor/xmlconverter.php function __Set_Text_Buffer($text) {

    //// work to set text on
    //// $this->text_body    = new GtkTextView();  /// :-) ///
    /////  $this->text_body->set_buffer($this->text_buffer);
    $buff  = &new GtkTextBuffer();
    $buff->set_text($text,strlen($text));
    return $buff;
    }

snip> But now edit text inside GtkTextView ok...... but to get return text can i use GtkTextBuffer() ? or wath is the job from gtktextiter ?? http://ciz.ch/svnciz/new_php_gtk2/xmleditor/Doc_PHP_Class/GtkTextIter.html how return text? Tanks peter www.ciz.ch function __Return_Text_Buffer() {

    ///$text = $this->text_buffer->get_char_count();  //// work
    /// $text = $this->text_body->get_name();   //// work
    /// $text = $this->text_body->get_property('justification');   /// not work
    $text = $this->text_body->get_buffer();
    $op = $text->get_data('text');   ///// null??
    return $op;
    }