WordPress开发教程：自定义分类法

wordpress初始只定义了文章分类，但如果需要自定义分类改怎么办呢？不用担心，wordpress官方已经给我们准备好了

相关钩子函数

register_taxonomy( string $taxonomy, array|string $object_type, array|string $args = array() )，注册分类法

案例

给文章类型为book的文章添加两个分类“genre”，‘“writer”

/**
 * Create two taxonomies, genres and writers for the post type "book".
 *
 * @see register_post_type() for registering custom post types.
 */
function wpdocs_create_book_taxonomies() {
    // Add new taxonomy, make it hierarchical (like categories)
    $labels = array(
        'name'              => _x( 'Genres', 'taxonomy general name', 'textdomain' ),
        'singular_name'     => _x( 'Genre', 'taxonomy singular name', 'textdomain' ),
        'search_items'      => __( 'Search Genres', 'textdomain' ),
        'all_items'         => __( 'All Genres', 'textdomain' ),
        'parent_item'       => __( 'Parent Genre', 'textdomain' ),
        'parent_item_colon' => __( 'Parent Genre:', 'textdomain' ),
        'edit_item'         => __( 'Edit Genre', 'textdomain' ),
        'update_item'       => __( 'Update Genre', 'textdomain' ),
        'add_new_item'      => __( 'Add New Genre', 'textdomain' ),
        'new_item_name'     => __( 'New Genre Name', 'textdomain' ),
        'menu_name'         => __( 'Genre', 'textdomain' ),
    );

    $args = array(
        'hierarchical'      => true,
        'labels'            => $labels,
        'show_ui'           => true,
        'show_admin_column' => true,
        'query_var'         => true,
        'rewrite'           => array( 'slug' => 'genre' ),
    );

    register_taxonomy( 'genre', array( 'book' ), $args );

    unset( $args );
    unset( $labels );

    // Add new taxonomy, NOT hierarchical (like tags)
    $labels = array(
        'name'                       => _x( 'Writers', 'taxonomy general name', 'textdomain' ),
        'singular_name'              => _x( 'Writer', 'taxonomy singular name', 'textdomain' ),
        'search_items'               => __( 'Search Writers', 'textdomain' ),
        'popular_items'              => __( 'Popular Writers', 'textdomain' ),
        'all_items'                  => __( 'All Writers', 'textdomain' ),
        'parent_item'                => null,
        'parent_item_colon'          => null,
        'edit_item'                  => __( 'Edit Writer', 'textdomain' ),
        'update_item'                => __( 'Update Writer', 'textdomain' ),
        'add_new_item'               => __( 'Add New Writer', 'textdomain' ),
        'new_item_name'              => __( 'New Writer Name', 'textdomain' ),
        'separate_items_with_commas' => __( 'Separate writers with commas', 'textdomain' ),
        'add_or_remove_items'        => __( 'Add or remove writers', 'textdomain' ),
        'choose_from_most_used'      => __( 'Choose from the most used writers', 'textdomain' ),
        'not_found'                  => __( 'No writers found.', 'textdomain' ),
        'menu_name'                  => __( 'Writers', 'textdomain' ),
    );

    $args = array(
        'hierarchical'          => false,
        'labels'                => $labels,
        'show_ui'               => true,
        'show_admin_column'     => true,
        'update_count_callback' => '_update_post_term_count',
        'query_var'             => true,
        'rewrite'               => array( 'slug' => 'writer' ),
    );

    register_taxonomy( 'writer', 'book', $args );
}
// hook into the init action and call create_book_taxonomies when it fires
add_action( 'init', 'wpdocs_create_book_taxonomies', 0 );