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How to add article category management function to WordPress plug-in
WordPress is one of the most widely used content management systems at present, and it provides a wealth of plug-ins to extend its functions. . If you are a plug-in developer, you may encounter the need to add article category management functions to your plug-in. This article will introduce you to how to add article category management functions to WordPress plugins, and provide code examples for reference.
register_taxonomy()
function. The following is a sample code: // 在插件的主活动文件中添加以下代码 function custom_plugin_taxonomy() { $labels = array( 'name' => _x( '插件分类', 'taxonomy general name', 'textdomain' ), 'singular_name' => _x( '插件分类', 'taxonomy singular name', 'textdomain' ), 'search_items' => __( '搜索分类', 'textdomain' ), 'all_items' => __( '所有分类', 'textdomain' ), 'parent_item' => __( '父级分类', 'textdomain' ), 'parent_item_colon' => __( '父级分类:', 'textdomain' ), 'edit_item' => __( '编辑分类', 'textdomain' ), 'update_item' => __( '更新分类', 'textdomain' ), 'add_new_item' => __( '添加新分类', 'textdomain' ), 'new_item_name' => __( '新分类名称', 'textdomain' ), 'menu_name' => __( '分类', 'textdomain' ), ); $args = array( 'hierarchical' => true, 'labels' => $labels, 'show_ui' => true, 'show_admin_column' => true, 'query_var' => true, 'rewrite' => array( 'slug' => 'plugin_category' ), ); register_taxonomy( 'plugin_category', array( 'post' ), $args ); } add_action( 'init', 'custom_plugin_taxonomy', 0 );
In the above code, we use the register_taxonomy()
function to create a new article category named plugin_category
. This category has some basic properties such as name, search text, and editing operations.
add_meta_box()
to achieve this. The following is a sample code: // 在插件的主活动文件中添加以下代码 function custom_plugin_taxonomy_meta_box() { add_meta_box( 'plugin_category', __( '插件分类', 'textdomain' ), 'custom_plugin_taxonomy_meta_box_callback', 'post', 'side', 'default' ); } add_action( 'add_meta_boxes', 'custom_plugin_taxonomy_meta_box' ); function custom_plugin_taxonomy_meta_box_callback( $post ) { wp_nonce_field( 'custom_plugin_taxonomy_meta_box', 'custom_plugin_taxonomy_meta_box_nonce' ); $terms = get_terms( array( 'taxonomy' => 'plugin_category', 'hide_empty' => false, ) ); if ( ! empty( $terms ) && ! is_wp_error( $terms ) ) { echo '<select name="plugin_category">'; foreach ( $terms as $term ) { echo '<option value="' . $term->term_id . '">' . $term->name . '</option>'; } echo '</select>'; } }
In the above code, we use the add_meta_box()
function to add a new meta box for displaying the category selection box. In the custom_plugin_taxonomy_meta_box_callback()
function, we use the get_terms()
function to get all available categories and output a drop-down menu for the user to choose.
save_post
to handle this task. The following is a sample code: // 在插件的主活动文件中添加以下代码 function custom_plugin_taxonomy_save_meta_box_data( $post_id ) { if ( ! isset( $_POST['plugin_category'] ) ) { return; } if ( ! wp_verify_nonce( $_POST['custom_plugin_taxonomy_meta_box_nonce'], 'custom_plugin_taxonomy_meta_box' ) ) { return; } if ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE ) { return; } if ( ! current_user_can( 'edit_post', $post_id ) ) { return; } $term_id = intval( $_POST['plugin_category'] ); wp_set_post_terms( $post_id, array( $term_id ), 'plugin_category' ); } add_action( 'save_post', 'custom_plugin_taxonomy_save_meta_box_data' );
In the above code, we check whether the category selection box is selected and verify the submitted form data using the wp_verify_nonce()
function. Then, we use the wp_set_post_terms()
function to save the selected category to the current article.
Through the above steps, you have successfully added the article category management function to your WordPress plug-in. Users can now select and manage categories in the article editing page for a better content management experience.
Summary
This article introduces how to add article category management functions to the WordPress plug-in and provides relevant code examples. You can add this by using the register_taxonomy()
function to create a taxonomy, the add_meta_box()
function to add interfaces, and the save_post
hook function to save and update the taxonomy. Features are quickly integrated into their own plug-ins. I hope this article is helpful to you, and I wish you can write more powerful WordPress plug-ins!
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