Wordpress Page Excerpt Widget new features: v0.3 ?

<?php
/*
    Plugin Name: Page Excerpt Widget
    Plugin URI: http://jonathanmh.com/wordpress-page-excerpt-widget/
    Description: Plugin for displaying a page excerpt in a widget area
    Author: Jonathan M. Hethey, David Comuñas
    Version: 0.2
    Author URI: http://jonathanmh.com
*/

global $wp_version;
if((float)$wp_version >= 2.8){
class PageExcerptWidget extends WP_Widget {

    /*
    * construct
    */

    function PageExcerptWidget() {
        parent::WP_Widget(
            'PageExcerptWidget'
            , 'Page Excerpt Widget'
            , array(
                'description' => 'Display Excerpt of Page in any Widget Area'
            )
        );
    }

    function pew_trim($text, $length) {
        // if the text is longer than the length it is supposed to be
        if (strlen($text) > $length){
            // trim to length
            $text = substr($text, 0, $length);
            // find last whitespace in string
            $last_whitespace = strrpos($text, ' ');
            // trim to last whitespace in string
            $text = substr($text, 0, $last_whitespace);
            // append dots
            return $text;
        }
        // if the text is shorter than the trim limit, pass it on
        else {
            return $text;
        }
    }

    function widget($args, $instance) {
        extract($args, EXTR_SKIP);
        echo $before_widget;
        $page_data = get_page($instance['page_id']);
        $title = $page_data->post_title;
        $permalink = get_permalink($instance['page_id']);
        if (!empty($title) && $instance['display_title'] == 'on') {
            echo $before_title;
            if ($instance['link_title']){
                echo '<a href="'. $permalink .'">'. $title . '</a>';
            }
            else {
                echo $title;
            }
            echo $after_title;
        };

        if ($instance['enable_p_tags'] == 'on'){
            echo '<p>';
        }

        $trimmed_content = $this->pew_trim($page_data->post_content, $instance['excerpt_length']);
        if ($instance['enable_apply_filters'] == 'on'){
            echo apply_filters('the_content', $trimmed_content);
        } else {
            echo $trimmed_content;
        }

        if ($instance['dot_excerpt'] == 'on'){
            echo ' <span class="jmhpew-dot-excerpt">[...]</span>';
        }

        if ($instance['enable_p_tags'] == 'on'){
            echo '</p>';
        }

        if ($instance['display_read_more'] == 'on'){
            echo '<p class="jmhpew-readmore"><a href="'. $permalink .'">'. $instance['read_more_label'] .'</a></p>';
        }

        /* debugging
            echo '<pre>';
            print_r($page_data);
            echo '</pre>';
        */
        echo $after_widget;

    }

    function update($new_instance, $old_instance) {
        $instance = $old_instance;
        $instance['page_id'] = strip_tags($new_instance['page_id']);
        $instance['excerpt_length'] = strip_tags($new_instance['excerpt_length']);
        $instance['dot_excerpt'] = strip_tags($new_instance['dot_excerpt']);
        $instance['display_title'] = strip_tags($new_instance['display_title']);
        $instance['link_title'] = strip_tags($new_instance['link_title']);
        $instance['display_read_more'] = strip_tags($new_instance['display_read_more']);
        $instance['enable_apply_filters'] = strip_tags($new_instance['enable_apply_filters']);
        $instance['enable_p_tags'] = strip_tags($new_instance['enable_p_tags']);
        $instance['read_more_label'] = strip_tags($new_instance['read_more_label']);
        return $instance;
    }

    function form($instance) {
        $default =  array(
              'title'               => 'Page Excerpt Widget'
            , 'excerpt_length'      => 500
            , 'dot_excerpt'         => 'on'
            , 'display_title'       => 'on'
            , 'display_read_more'   => 'on'
            , 'enable_apply_filters'    => 'off'
            , 'enable_p_tags'   => 'on'
            , 'read_more_label'     => 'read full page'
                         );
        $instance = wp_parse_args( (array) $instance, $default );
        $page_id = $this->get_field_name('page_id');
        _e("Page to display: " );
            ?>
            <select name="<?php echo $page_id; ?>">
                <?php
                    $pages = get_pages();
                    foreach ($pages as $page){
                        if ($page->ID == $instance['page_id']){
                            $selected = 'selected="selected"';
                        }
                        else {
                            $selected='';
                        }
                        echo '<option value="'
                            .$page->ID.'"'
                            .$selected.'>'
                            .$page->post_title
                            .'</option>';
                    };
                ?>
            </select>
        <?php

        $field_excerpt_length_id = $this->get_field_id('excerpt_length');
        $field_excerpt_length = $this->get_field_name('excerpt_length');
        echo "\r\n"
            .'<p><label for="'
            .$field_id
            .'">'
            .__('Excerpt Length')
            .': </label><input type="text" id="'
            .$field_excerpt_length_id
            .'" name="'
            .$field_excerpt_length
            .'" value="'
            .esc_attr( $instance['excerpt_length'] )
            .'" /></p>';

        $field_dot_excerpt_id = $this->get_field_id('dot_excerpt');
        $field_dot_excerpt = $this->get_field_name('dot_excerpt');

        if ($instance['dot_excerpt'] == 'on'){
            $checked = 'checked="checked"';
        }
        else {
            $checked = '';
        }

        echo "\r\n"
            .'<p><input type="checkbox" id="'
            .$field_dot_excerpt_id
            .'" name="'
            .$field_dot_excerpt
            .'" value="on"'
            .$checked
            .'/> <label for="'
            .$field_dot_excerpt_id
            .'">'
            .__('Show dots after excerpt `[...]`')
            .' </label></p>';

        $field_display_title_id = $this->get_field_id('display_title');
        $field_display_title = $this->get_field_name('display_title');


        if ($instance['display_title'] == 'on'){
            $checked = 'checked="checked"';
        }
        else {
            $checked = '';
        }

        echo "\r\n"
            .'<p><input type="checkbox" id="'
            .$field_display_title_id
            .'" name="'
            .$field_display_title
            .'" value="on"'
            .$checked
            .'/> <label for="'
            .$field_display_title_id
            .'">'
            .__('Display Page Title')
            .' </label></p>';

        $field_link_title_id = $this->get_field_id('link_title');
        $field_link_title = $this->get_field_name('link_title');

        if ($instance['link_title'] == 'on'){
            $checked = 'checked="checked"';
        }
        else {
            $checked = '';
        }

        echo "\r\n"
            .'<p><input type="checkbox" id="'
            .$field_link_title_id
            .'" name="'
            .$field_link_title
            .'" value="on"'
            .$checked
            .'/> <label for="'
            .$field_link_title_id
            .'">'
            .__('Link Page Title')
            .' </label></p>';

        $field_display_read_more_id = $this->get_field_id('display_read_more');
        $field_display_read_more = $this->get_field_name('display_read_more');

        if ($instance['display_read_more'] == 'on'){
            $checked = 'checked="checked"';
        }
        else {
            $checked = '';
        }

        echo "\r\n"
            .'<p><input type="checkbox" id="'
            .$field_display_read_more_id
            .'" name="'
            .$field_display_read_more
            .'" value="on"'
            .$checked
            .'/> <label for="'
            .$field_display_read_more_id
            .'">'
            .__('Display Read More Link')
            .' </label></p>';

        $field_read_more_label_id = $this->get_field_id('read_more_label');
        $field_read_more_label = $this->get_field_name('read_more_label');
        echo "\r\n"
            .'<p><label for="'
            .$field_read_more_label_id
            .'">'
            .__('Read More Label')
            .': </label><input type="text" id="'
            .$field_read_more_label_id
            .'" name="'
            .$field_read_more_label
            .'" value="'
            .esc_attr( $instance['read_more_label'] ).'"'
            .'placeholder="read full page"'
            .'/></p>';

        $field_enable_apply_filters_id = $this->get_field_id('enable_apply_filters');
        $field_enable_apply_filters = $this->get_field_name('enable_apply_filters');

        if ($instance['enable_apply_filters'] == 'on'){
            $checked = 'checked="checked"';
        }
        else {
            $checked = '';
        }

        echo "\r\n"
            .'<p><input type="checkbox" id="'
            .$field_enable_apply_filters_id
            .'" name="'
            .$field_enable_apply_filters
            .'" value="on"'
            .$checked
            .'/> <label for="'
            .$field_enable_apply_filters_id
            .'">'
            .__('Apply Wordpress filters to the content')
            .' </label></p>';

        $field_enable_p_tags_id = $this->get_field_id('enable_p_tags');
        $field_enable_p_tags = $this->get_field_name('enable_p_tags');

        if ($instance['enable_p_tags'] == 'on'){
            $checked = 'checked="checked"';
        }
        else {
            $checked = '';
        }

        echo "\r\n"
            .'<p><input type="checkbox" id="'
            .$field_enable_p_tags_id
            .'" name="'
            .$field_enable_p_tags
            .'" value="on"'
            .$checked
            .'/> <label for="'
            .$field_enable_p_tags_id
            .'">'
            .__('Enable "p" tags around content')
            .' </label></p>';


    }

/* class end */
}
}

add_action('widgets_init', 'page_excerpt_widgets');

function page_excerpt_widgets(){
    register_widget('PageExcerptWidget');
}

?>