在制作流行贴子的过程中，我看到了以下通知：
Notice: Undefined index: popular_posts_order_by in /hermes/bosnaweb09a/b2039/ipg.tutorialcoursecom/arifhossin/wp-content/themes/testtheme/framework/widgets/pb-popular-post.php on line 26.
以下是我的代码。。谁能解决这个问题？
<?php
add_action( \'widgets_init\', \'personalblog_popular_posts_widget\' );
function personalblog_popular_posts_widget() {
register_widget( \'Personalblog_Popular_Posts\' );
}
class Personalblog_Popular_Posts extends WP_Widget{
// Initialize the widget
public function __construct() {
parent::__construct(
\'personalblog_popular_posts_widget\', esc_html__(\'Strawberry: Popular Posts Widget\',\'strawberry\'), array(\'description\' => esc_html__(\'Strawberry:A widget that shows Polupar Posts\', \'strawberry\')));
}
// Output of the widget
public function widget( $args, $instance ) {
extract($args);
$title = apply_filters(\'widget_title\', $instance[\'title\']);
$popular_posts_order_by = $instance[\'popular_posts_order_by\'];
$poular_posts_time_range = $instance[\'poular_posts_time_range\'];
$num_fetch = $instance[\'num_fetch\'];
// Opening of widget
echo $before_widget;
// Open of title tag
if( !empty($title) ){
echo $before_title . $title . $after_title;
}
$args = array(
\'post_type\' => \'post\',
\'posts_per_page\' => $num_fetch,
\'ignore_sticky_posts\' => true,
\'no_found_rows\' => true,
\'post_status\' => \'publish\',
\'orderby\' => $popular_posts_order_by,
\'order\' => \'DESC\',
\'date_query\' => array(
array(
\'after\' => $poular_posts_time_range,
),
),
);
$posts_query = new WP_Query($args); ?>
<?php if ( $posts_query->have_posts() ) { ?>
<div class="pb-recent-posts-widget-section clearfix">
<ul class="pb-recent-post-widget-list">
<?php while ( $posts_query->have_posts() ) : $posts_query->the_post(); ?>
<li id="post-<?php the_ID(); ?>">
<figure class="pb-recent-post-widget-thumbnail-section">
<a href="<?php the_permalink(); ?>" title="<?php echo esc_attr( the_title_attribute( \'echo=0\' ) ); ?>" rel="bookmark">
<?php the_post_thumbnail( \'widget-post-image\' ); ?>
</a>
</figure>
<div class="pb-recent-post-widget-section">
<h2 class="pb-recent-post-widget-title"><a href="<?php the_permalink(); ?>" title="<?php echo esc_attr( the_title_attribute( \'echo=0\' ) ); ?>" rel="bookmark"><?php the_title(); ?></a></h2>
<?php if( pb_theme_options(\'enable_widget_meta\') == \'1\' ) { ?>
<div class="pb-recent-post-widget-meta clearfix">
<ul>
<?php if( pb_theme_options(\'widget_meta_date\') == \'1\' ) { ?>
<li><i class="fa fa-clock-o"></i><span><?php echo get_the_date(); ?></span></li>
<?php } ?>
<?php if( pb_theme_options(\'widget_meta_comments\') == \'1\' ) { ?>
<li><i class="fa fa-comments">
<span>
<?php printf( _nx( \'\', \'%1$s\', \'comments title\', get_comments_number(), \'personalblog\' ), number_format_i18n( get_comments_number() ) ); ?>
</span>
</i>
</li>
<?php } ?>
</ul>
<ul>
<?php if( pb_theme_options(\'widget_meta_category\') == \'1\' ) { ?>
<li><p class="category"><i class="fa fa-folder-open"> </i> <?php the_category(\', \'); ?></p></li>
<?php } ?>
<?php if( pb_theme_options(\'widget_meta_likes\') == \'1\' ) { ?>
<li><?php echo getPostLikeLink( get_the_ID() )?> </li>
<?php } ?>
</ul>
</div>
<?php } ?>
</div>
</li>
<?php endwhile; ?>
</ul>
</div>
<?php }
wp_reset_postdata();
// Closing of widget
echo $after_widget;
}
// Widget Form
public function form( $instance ) {
$defaults = array(
\'title\' => \'Popular Posts\',
\'popular_posts_order_by\' => \'post_views_count\',
\'num_fetch\' => \'5\',
\'poular_posts_time_range\' => \'0\'
);
$instance = wp_parse_args( (array) $instance, $defaults ); ?>
<p>
<label for="<?php echo $this->get_field_id(\'title\'); ?>"><?php esc_html_e( \'Title:\', \'strawberry\' ); ?></label>
<input class="widefat" id="<?php echo $this->get_field_id(\'title\'); ?>" name="<?php echo $this->get_field_name(\'title\'); ?>" type="text" value="<?php echo esc_attr( $instance[\'title\'] ); ?>" />
</p>
<p>
<label for="<?php echo esc_attr ($this->get_field_id(\'popular_posts_order_by\')); ?>"><?php esc_html_e( \'Order by:\', \'strawberry\' ); ?></label>
<select name="<?php echo esc_attr ($this->get_field_name(\'popular_posts_order_by\')); ?>" id="<?php echo esc_attr ($this->get_field_id(\'popular_posts_order_by\')); ?>" class="widefat">
<option value="post_views_count"<?php selected( $instance[\'popular_posts_order_by\'], \'post_views_count\' ); ?>><?php esc_html_e( \'View Count\', \'strawberry\' ); ?></option>
<option value="comment_count"<?php selected( $instance[\'popular_posts_order_by\'], \'comment_count\' ); ?>><?php esc_html_e( \'Most commented\', \'strawberry\' ); ?></option>
</select>
</p>
<p>
<label for="<?php echo esc_attr ($this->get_field_id(\'poular_posts_time_range\')); ?>"><?php esc_html_e( \'Time Range:\', \'strawberry\' ); ?></label>
<select name="<?php echo esc_attr ( $this->get_field_name(\'poular_posts_time_range\')); ?>" id="<?php echo esc_attr ( $this->get_field_id(\'poular_posts_time_range\')); ?>" class="widefat">
<option value="0"<?php selected( $instance[\'poular_posts_time_range\'], \'0\' ); ?>><?php esc_html_e( \'All time\', \'strawberry\' ); ?></option>
<option value="1 year ago"<?php selected( $instance[\'poular_posts_time_range\'], \'1 year ago\' ); ?>><?php _e( \'This year\', \'strawberry\' ); ?></option>
<option value="1 month ago"<?php selected( $instance[\'poular_posts_time_range\'], \'1 month ago\' ); ?>><?php esc_html_e( \'This month\', \'strawberry\' ); ?></option>
<option value="1 week ago"<?php selected( $instance[\'poular_posts_time_range\'], \'1 week ago\' ); ?>><?php esc_html_e( \'This week\', \'strawberry\' ); ?></option>
<option value="1 day ago"<?php selected( $instance[\'poular_posts_time_range\'], \'1 day ago\' ); ?>><?php esc_html_e( \'Past 24 hours\', \'strawberry\' ); ?></option>
</select>
</p>
<p>
<label for="<?php echo $this->get_field_id(\'num_fetch\'); ?>"><?php esc_html_e( \'Number of posts to show:\', \'strawberry\' ); ?></label>
<input class="widefat" id="<?php echo $this->get_field_id(\'num_fetch\'); ?>" name="<?php echo $this->get_field_name(\'num_fetch\'); ?>" type="text" value="<?php echo intval( $instance[\'num_fetch\'] ); ?>" />
</p>
<?php
}
// Update the widget
public function update( $new_instance, $old_instance ) {
$instance = $old_instance;
$instance[\'title\'] = strip_tags($new_instance[\'title\']);
$instance[\'popular_posts_order_by\'] = $new_instance[\'popular_posts_order_by\'];
$instance[\'poular_posts_time_range\'] =$new_instance[\'poular_posts_time_range\'];
$instance[\'num_fetch\'] = $new_instance[\'num_fetch\'];
return $instance;
}
}
?>
谢谢
