我正在尝试为我的网站创建一个小部件。这是我第一次创建widget，我真的不确定问题是什么

以下是我的代码：

add_action( \'widgets_init\', \'wy_rss_widget\' );

function wy_rss_widget() {
    register_widget( \'WY_rss_widget\' );
}

class WY_rss_widget extends WP_Widget {

    function WY_rss_widget() {
        $widget_ops = array( \'classname\' => \'wy-rss\', \'description\' => __(\'A widget for displaying RSS feed\', \'wy-rss\') );
        $control_ops = array( \'width\' => 300, \'height\' => 350, \'id_base\' => \'wy-rss-widget\' );
        $this->WP_Widget( \'wy-rss-widget\', __(\'RSS Widget\', \'wy-rss\'), $widget_ops, $control_ops );
    }

    function widget( $args, $instance ) {
        extract( $args );

        //Our variables from the widget settings.
        $title = apply_filters(\'widget_title\', $instance[\'title\'] );
        $wy_rssURL = $instance[\'wy_rssURL\'];
        $wy_rssLimit = $instance[\'wy_rssLimit\'];

        echo $before_widget;

        // Display the widget title 
        if ( $title ) {
            echo $before_title . $title . $after_title;
        }

        //Display the name 
        if ( ( $wy_rssURL != " " || $wy_rssURL != "FEED URL" ) && ( $wy_rssLimit != " " ) ) {
            $rss = new DOMDocument();
            $rss->load($wy_rssURL);
            $feed = array();
            foreach ($rss->getElementsByTagName(\'item\') as $node) {
                $item = array ( 
                    \'title\' => $node->getElementsByTagName(\'title\')->item(0)->nodeValue,
                    \'desc\' => $node->getElementsByTagName(\'description\')->item(0)->nodeValue,
                    \'link\' => $node->getElementsByTagName(\'link\')->item(0)->nodeValue,
                    \'date\' => $node->getElementsByTagName(\'pubDate\')->item(0)->nodeValue,
                );
                array_push($feed, $item);
            }
            $limit = $wy_rssLimit;

            echo \'<ul>\';
            echo \'<li>\'.$wy_rssURL.\' (\'.$limit.\')</li>\';
            for($x=0;$x<$limit;$x++) {
                $title = str_replace(\' & \', \' &amp; \', $feed[$x][\'title\']);
                $link = $feed[$x][\'link\'];
                $description = $feed[$x][\'desc\'];
                $date = date(\'l F d, Y\', strtotime($feed[$x][\'date\']));

                echo \'<li>\';
                echo \'<p><strong><a href="\'.$link.\'" title="\'.$title.\'">\'.$title.\'</a></strong><br />\';
                echo \'<small><em>Posted on \'.$date.\'</em></small></p>\';
                echo \'<p>\'.$description.\'</p>\';
                echo \'</li>\';
            }
            echo \'</ul>\';
        }

        echo $after_widget;
    }

    //Update the widget 

    function update( $new_instance, $old_instance ) {
        $instance = $old_instance;

        //Strip tags from title and name to remove HTML 
        $instance[\'title\'] = strip_tags( $new_instance[\'title\'] );
        $instance[\'wy_rssURL\'] = strip_tags( $new_instance[\'wy_rssURL\'] );
        $instance[\'wy_rssLimit\'] = strip_tags( $new_instance[\'wy_rssLimit\'] );

        return $instance;
    }


    function form( $instance ) {

        //Set up some default widget settings.
        $defaults = array( \'title\' => __(\'Title\', \'wy-rss\'), \'wy_rssURL\' => __(\'FEED URL\', \'wy-rss\'), \'wy_rssLimit\' => __(\'5\',\'wy-rss\') );
        $instance = wp_parse_args( (array) $instance, $defaults ); ?>

        <p>
            <label for="<?php echo $this->get_field_id( \'title\' ); ?>"><?php _e(\'Title:\', \'wp-rss\'); ?></label>
            <input id="<?php echo $this->get_field_id( \'title\' ); ?>" name="<?php echo $this->get_field_name( \'title\' ); ?>" value="<?php echo $instance[\'title\']; ?>" style="width:100%;" />
        </p>

        <p>
            <label for="<?php echo $this->get_field_id( \'wy_rssURL\' ); ?>"><?php _e(\'URL:\', \'wp-rss\'); ?></label>
            <input id="<?php echo $this->get_field_id( \'wy_rssURL\' ); ?>" name="<?php echo $this->get_field_name( \'wy_rssURL\' ); ?>" value="<?php echo $instance[\'wy_rssURL\']; ?>" style="width:100%;" />
        </p>

        <p>
            <label for"<?php echo $this->get_field_id( \'wy_rssLimit\' ); ?>"><?php _e(\'Number of items:\', \'wp-rss\'); ?></label>
            <input id="<?php echo $this->get_field_id( \'wy_rssLimit\' ); ?>" name="<?php echo $this->get_field_id( \'wy_rssLimit\' ); ?>" value="<?php echo $instance[\'wy_rssLimit\']; ?>" />
        </p>

    <?php
    }
}

未存储“wy\\u rssLimit”的值，其中“title”和“wy\\u rssURL”的值为。我真的不知道该去哪里找。有人能帮忙吗？

name="<?php echo $this->get_field_name( \'wy_rssLimit\' ); ?>"

name="<?php echo $this->get_field_id( \'wy_rssLimit\' ); ?>"