我跟着this tutorial 关于如何在我制作的自定义帖子类型上创建元盒，当时它工作得很好。第一次很有魅力。但这次，在一个非常相似的环境中，情况并非如此。有趣的是，我可以在管理页面中看到显示或隐藏元数据库的选项。还有，如果我搞砸了add_meta_box 位，它会在元框中添加一个PHP错误表，否则就会丢失。

这是我函数中的当前代码。php：

// Custom post type arcticles
function create_arcticles()
{
    register_taxonomy_for_object_type(\'category\', \'arcticles\'); // Register Taxonomies for Category
    register_taxonomy_for_object_type(\'post_tag\', \'arcticles\');
    register_post_type(\'arcticles\', // Register Custom Post Type
        array(
        \'labels\' => array(
            \'name\' => __(\'arcticles\', \'arcticles\'), // Rename these to suit
            \'singular_name\' => __(\'arcticle\', \'arcticles\'),
            \'add_new\' => __(\'Adicionar novo\', \'arcticles\'),
            \'add_new_item\' => __(\'Adicionar novo arcticle\', \'arcticles\'),
            \'edit\' => __(\'Editar\', \'arcticles\'),
            \'edit_item\' => __(\'Editar arcticle\', \'arcticles\'),
            \'new_item\' => __(\'Novo arcticle\', \'arcticles\'),
            \'view\' => __(\'Ver arcticle\', \'arcticles\'),
            \'view_item\' => __(\'Ver arcticle\', \'arcticles\'),
            \'search_items\' => __(\'Procurar por arcticles\', \'arcticles\'),
            \'not_found\' => __(\'Nenhum arcticle encontrado\', \'arcticles\'),
            \'not_found_in_trash\' => __(\'Nenhum arcticle encontrado no lixo\', \'arcticles\')
        ),
        \'public\' => true,
        \'hierarchical\' => false, // Allows your posts to behave like Hierarchy Pages
        \'has_archive\' => true,
        \'supports\' => array(
            \'title\',
            \'excerpt\'
        ),
        \'can_export\' => true,
        \'taxonomies\' => array(
            \'post_tag\',
            \'category\'
        ), // Add categories and tags
        \'register_meta_box_cb\' => \'add_link_metaboxes\'
    ));
}

// Add the meta box
function add_link_metaboxes () {
    add_meta_box( \'linkToArcticle\', \'Link to arcticle\', \'linkToArcticle\', \'arcticles\', \'default\', \'normal\' );
}

// Add Metabox content
function linkToArcticle() {
    global $post;
    // Noncename seems to be obligatory
    echo \'<input type="hidden" name="eventmeta_noncename" id="eventmeta_noncename" value="\' .
    wp_create_nonce( plugin_basename(__FILE__) ) . \'" />\';
    // Pegar o link se ele já foi gerado
    $link = get_post_meta($post->ID, \'_link\', true);
    // Echo the link\'s field
    echo \'<input type="text" name="_link" value="\' . $link  . \'" class="widefat" />\';
}