我已经看过这个问题的以前的例子，但根据我从其他人那里看到的情况，我找不到导致这个通知的解决方案。当我添加新帖子时，这会出现在屏幕顶部。

1145是：

$post = get_post( $args[0] );

Any help on this?

//show metabox in post editing page
add_action(\'add_meta_boxes\', \'kk_add_metabox\' );

//save metabox data
add_action(\'save_post\', \'kk_save_metabox\' );

//register widgets
add_action(\'widgets_init\', \'kk_widget_init\');

function kk_add_metabox() {
    add_meta_box(\'kk_youtube\', \'YouTube Video Link\',\'kk_youtube_handler\', \'post\');
}

/**
 * metabox handler
 */
function kk_youtube_handler($post)
{
    $youtube_link = esc_attr( get_post_meta( $post->ID, \'kk_youtube\', true ) );

    echo \'<label for="kk_youtube">YouTube Video Link</label><input type="text" id="kk_youtube" name="kk_youtube" value="\' . $youtube_link . \'" />\';
}

/**
 * save metadata
 */
function kk_save_metabox($post_id) {

if( defined( \'DOING_AUTOSAVE\' ) && DOING_AUTOSAVE ) {
    return;
}

//check if user can edit post
if( !current_user_can( \'edit_post\' ) ) {
    return;
}

    if( isset($_POST[\'kk_youtube\'] )) {
        update_post_meta($post_id, \'kk_youtube\', esc_url($_POST[\'kk_youtube\']));
    }
}

/**
 * register widget
 */
function kk_widget_init() {
    register_widget(\'KK_Widget\');
}

/**
 * Class KK_Widget widget class
 */
class KK_Widget extends WP_Widget
{
function __construct()
{
    $widget_options = array(
        \'classname\' => \'kk_class\', // For CSS class name
        \'description\' => \'Show a YouTube video from post metadata\'
    );

    $this->WP_Widget(\'kk_id\', \'YouTube Video\', $widget_options);
}

/**
 * Show widget form in Appearance/Widgets
 */
function form($instance)
{
    $defaults = array(
        \'title\' => \'YouTube Video\'
    );

    $instance = wp_parse_args((array)$instance, $defaults);
    var_dump($instance);
    $title = esc_attr($instance[\'title\']);

    echo \'<p>Title <input type="text" class="widefat" name="\' . $this->get_field_name(\'title\') . \'" value="\' . $title . \'" /></p>\';
}

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

    $instance[\'title\'] = strip_tags($new_instance[\'title\']);

    return $instance;
}

/**
 * Show widget in post/page
 */
function widget($args, $instance)
{
    global $before_widget;
    global $after_widget;
    global $before_title;
    global $after_title;

    extract( $args );
    $title = apply_filters(\'widget_title\', $instance[\'title\']);

    //show only if single post
    if(is_single()) {
        echo $before_widget;
        echo $before_title.$title.$after_title;

        //get post metadata
        $kk_youtube = esc_url(get_post_meta(get_the_ID(), \'kk_youtube\', true));

        //print widget content
        echo \'<iframe width="200" height="200" frameborder="0" allowfullscreen src="http://www.youtube.com/embed/\' . $this->get_yt_videoid($kk_youtube) . \'"></iframe>\';

        echo $after_widget;
    }
}

function get_yt_videoid($url)
{
    parse_str(parse_url($url, PHP_URL_QUERY), $my_array_of_vars);

    return $my_array_of_vars[\'v\'];
}
}