我已经运行这个网站4年了，今天我的自定义帖子类型突然从管理菜单中消失了。内容也未显示。无法找到问题。这是代码

add_action( \'init\', \'create_article_type\' );
function create_article_type() {
register_post_type( \'article\',
array(
  \'labels\' => array(
    \'name\' => __( \'Article Posts\' ),
    \'singular_name\' => __( \'Article\' )
  ),
  \'public\' => true,
  \'has_archive\' => true,
  \'taxonomies\' => array(\'post_category\'),
  \'supports\' => array( \'title\', \'editor\', \'thumbnail\' ),
)
);
}

function add_issuelink_metabox($postType) {
    global $post,$wpdb;

    $types = array(\'article\',\'post\');
    if(in_array($postType, $types)){
        add_meta_box("add_issuelink_metabox-meta", "Issue Link", "show_issuelink_metabox", $postType);
    }

}
add_action (\'add_meta_boxes\',\'add_issuelink_metabox\');
function show_issuelink_metabox()
{
    global $post,$wpdb;
    $issuelink=get_post_meta($post->ID, "issuelink", 1);
?>

    Issue Link:&nbsp;&nbsp;<input type="text"  style="width:700px" name="issuelink" id="issuelink" value="<?php echo $issuelink;?>"></input>
<?php   

}

add_action (\'save_post\',\'save_articlepost_metabox\');    

function save_articlepost_metabox(){
    global $post;
    update_post_meta($post->ID, "issuelink", $_POST["issuelink"]);
}



register_taxonomy("post_category", array("article"), 
    array("hierarchical" => true,
            "label" => "Posts Category",
            "singular_label" => "Post Category", 
            "show_in_nav_menus"=>true,  

            ));