goldenapple最初的回答给了我完成这项工作所需的快速启动。

功能。php下面是我用来添加新帖子类型“header image”并相应修改其他管理屏幕的完整代码：

/**
 * Register the Header Image custom post type.
 */
function sixohthree_init() {
    $labels = array(
        \'name\' => \'Header Images\',
        \'singular_name\' => \'Header Image\',
        \'add_new_item\' => \'Add Header Image\',
        \'edit_item\' => \'Edit Header Image\',
        \'new_item\' => \'New Header Image\',
        \'view_item\' => \'View Header Image\',
        \'search_items\' => \'Search Header Images\',
        \'not_found\' => \'No Header Images found\',
        \'not_found_in_trash\' => \'No Header Images found in Trash\'
    );

    $args = array(
        \'labels\' => $labels,
        \'public\' => false,
        \'show_ui\' => true,
        \'supports\' => array(\'thumbnail\')
    );

    register_post_type( \'header-image\', $args );
}
add_action( \'init\', \'sixohthree_init\' );

/**
 * Modify which columns display when the admin views a list of header-image posts.
 */
function sixohthree_headerimage_posts_columns( $posts_columns ) {
    $tmp = array();

    foreach( $posts_columns as $key => $value ) {
        if( $key == \'title\' ) {
            $tmp[\'header-image\'] = \'Header Image\';
        } else {
            $tmp[$key] = $value;
        }
    }

    return $tmp;
}
add_filter( \'manage_header-image_posts_columns\', \'sixohthree_headerimage_posts_columns\' );

/**
 * Custom column output when admin is view the header-image post list.
 */
function sixohthree_headerimage_custom_column( $column_name ) {
    global $post;

    if( $column_name == \'header-image\' ) {
        echo "<a href=\'", get_edit_post_link( $post->ID ), "\'>", get_the_post_thumbnail( $post->ID ), "</a>";
    }
}
add_action( \'manage_posts_custom_column\', \'sixohthree_headerimage_custom_column\' );

/**
 * Make the "Featured Image" metabox front and center when editing a header-image post.
 */
function sixohthree_headerimage_metaboxes( $post ) {
    global $wp_meta_boxes;

    remove_meta_box(\'postimagediv\', \'header-image\', \'side\');
    add_meta_box(\'postimagediv\', __(\'Featured Image\'), \'post_thumbnail_meta_box\', \'header-image\', \'normal\', \'high\');
}
add_action( \'add_meta_boxes_header-image\', \'sixohthree_headerimage_metaboxes\' );

/**
 * Enable thumbnail support in the theme, and set the thumbnail size.
 */
function sixohthree_after_setup() {
    add_theme_support( \'post-thumbnails\' );
    set_post_thumbnail_size(150, 100, true);
}
add_action( \'after_setup_theme\', \'sixohthree_after_setup\' );

管理屏幕截图

模板代码

$header_images = get_posts(\'post_type=header-image&orderby=rand&numberposts=2\');

foreach( $header_images as $idx => $post ) {
    setup_postdata($post);
    the_post_thumbnail(\'post-thumbnail\', array(\'class\' => \'snapshot snapshot\' . ($idx+1) ) );
}

function register_header_image() {
     register_post_type( \'header-image\', 
                         array( 
                             \'label\'=>\'Header Images\',
                             \'name\'=>\'Header Images\',
                             \'singular_name\'=>\'Header Image\',
                             \'public\'=>true,
                             \'show_ui\'=>true,
                             \'hierarchical\'=>true,
                             \'supports\'=>array(\'thumbnail\') ) );
}

add_action (\'init\',\'register_header_image\');
add_theme_support( \'post-thumbnails\' );