是否可以使用自定义帖子类型的下拉列表填充元框？我计划尝试为客户端创建一个模板，允许他们在仪表板中创建一个新页面，然后从CPT元框中选择一个自定义帖子类型，以选择在所述页面上显示的帖子。

更新：这是我目前掌握的最新情况。保存后，“post types”框不会返回值。任何帮助都将不胜感激。

    add_action( \'add_meta_boxes\', \'cd_meta_box_add\' );
   function cd_meta_box_add()
   {
add_meta_box( \'my-meta-box-id\', \'My First Meta Box\', \'cd_meta_box_cb\', \'page\', \'normal\', \'high\' );
   }

   function cd_meta_box_cb( $post )
   {
$values = get_post_custom( $post->ID );
$selected = isset( $values[\'my_meta_box_select\'] ) ? esc_attr(               $values[\'my_meta_box_select\'][0] ) : \'\';
wp_nonce_field( \'my_meta_box_nonce\', \'meta_box_nonce\' );
?>

<p>
    <label for="my_meta_box_select">Post type: </label>
    <select name="my_meta_box_select" id="my_meta_box_select">
        <?php $post_types=get_post_types(\'\', \'objects\'); foreach ($post_types as $post_type): ?>
        <option value="<?php echo esc_attr($post_type->name); selected ?>"><?php echo esc_html($post_type->label); selected ?></option>
        <?php endforeach; ?>
    </select>
</p>    

<p>  
    <label for="my_meta_box_select">Color</label>  
    <select name="my_meta_box_select" id="my_meta_box_select">  
        <option value="red" <?php selected( $selected, \'red\' ); ?>>Red</option>  
        <option value="blue" <?php selected( $selected, \'blue\' ); ?>>Blue</option>  
    </select>  
</p>     

<?php   
   }


   add_action( \'save_post\', \'cd_meta_box_save\' );
   function cd_meta_box_save( $post_id )
   {
// Bail if we\'re doing an auto save
if( defined( \'DOING_AUTOSAVE\' ) && DOING_AUTOSAVE ) return;

// if our nonce isn\'t there, or we can\'t verify it, bail
    if( !isset( $_POST[\'meta_box_nonce\'] ) || !wp_verify_nonce(        $_POST[\'meta_box_nonce\'], \'my_meta_box_nonce\' ) ) return;

// if our current user can\'t edit this post, bail
if( !current_user_can( \'edit_post\' ) ) return;

// now we can actually save the data
$allowed = array( 
    \'a\' => array( // on allow a tags
        \'href\' => array() // and those anchords can only have href        attribute
    )
);

// Probably a good idea to make sure your data is set

if( isset( $_POST[\'my_meta_box_select\'] ) )
    update_post_meta( $post_id, \'my_meta_box_select\', esc_attr( $_POST[\'my_meta_box_select\'] ) );

   }