139 lines
3.5 KiB
PHP
139 lines
3.5 KiB
PHP
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<?php
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/**
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* Menu item custom fields example
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*
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* Copy this file into your wp-content/mu-plugins directory.
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*
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* @package Menu_Item_Custom_Fields_Example
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* @version 0.2.0
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* @author Dzikri Aziz <kvcrvt@gmail.com>
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*
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*
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* Plugin name: Menu Item Custom Fields Example
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* Plugin URI: https://github.com/kucrut/wp-menu-item-custom-fields
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* Description: Example usage of Menu Item Custom Fields in plugins/themes
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* Version: 0.2.0
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* Author: Dzikri Aziz
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* Author URI: http://kucrut.org/
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* License: GPL v2
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* Text Domain: menu-item-custom-fields-example
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*/
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/**
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* Sample menu item metadata
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*
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* This class demonstrate the usage of Menu Item Custom Fields in plugins/themes.
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*
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* @since 0.1.0
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*/
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class Menu_Item_Custom_Fields_Example {
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/**
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* Holds our custom fields
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*
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* @var array
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* @access protected
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* @since Menu_Item_Custom_Fields_Example 0.2.0
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*/
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protected static $fields = array();
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/**
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* Initialize plugin
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*/
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public static function init() {
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add_action( 'wp_nav_menu_item_custom_fields', array( __CLASS__, '_fields' ), 10, 4 );
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add_action( 'wp_update_nav_menu_item', array( __CLASS__, '_save' ), 10, 3 );
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add_filter( 'manage_nav-menus_columns', array( __CLASS__, '_columns' ), 99 );
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self::$fields = array(
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'field-01' => __( 'Custom Field #1', 'menu-item-custom-fields-example' ),
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'field-02' => __( 'Custom Field #2', 'menu-item-custom-fields-example' ),
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);
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}
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/**
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* Save custom field value
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*
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* @wp_hook action wp_update_nav_menu_item
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*
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* @param int $menu_id Nav menu ID
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* @param int $menu_item_db_id Menu item ID
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* @param array $menu_item_args Menu item data
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*/
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public static function _save( $menu_id, $menu_item_db_id, $menu_item_args ) {
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if ( defined( 'DOING_AJAX' ) && DOING_AJAX ) {
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return;
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}
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check_admin_referer( 'update-nav_menu', 'update-nav-menu-nonce' );
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foreach ( self::$fields as $_key => $label ) {
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$key = sprintf( 'menu-item-%s', $_key );
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// Sanitize
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if ( ! empty( $_POST[ $key ][ $menu_item_db_id ] ) ) {
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// Do some checks here...
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$value = $_POST[ $key ][ $menu_item_db_id ];
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} else {
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$value = null;
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}
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// Update
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if ( ! is_null( $value ) ) {
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update_post_meta( $menu_item_db_id, $key, $value );
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} else {
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delete_post_meta( $menu_item_db_id, $key );
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}
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}
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}
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/**
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* Print field
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*
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* @param object $item Menu item data object.
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* @param int $depth Depth of menu item. Used for padding.
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* @param array $args Menu item args.
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* @param int $id Nav menu ID.
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*
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* @return string Form fields
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*/
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public static function _fields( $id, $item, $depth, $args ) {
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foreach ( self::$fields as $_key => $label ) :
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$key = sprintf( 'menu-item-%s', $_key );
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$id = sprintf( 'edit-%s-%s', $key, $item->ID );
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$name = sprintf( '%s[%s]', $key, $item->ID );
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$value = get_post_meta( $item->ID, $key, true );
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$class = sprintf( 'field-%s', $_key );
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?>
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<p class="description description-wide <?php echo esc_attr( $class ) ?>">
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<?php printf(
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'<label for="%1$s">%2$s<br /><input type="text" id="%1$s" class="widefat %1$s" name="%3$s" value="%4$s" /></label>',
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esc_attr( $id ),
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esc_html( $label ),
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esc_attr( $name ),
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esc_attr( $value )
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) ?>
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</p>
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<?php
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endforeach;
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}
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/**
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* Add our fields to the screen options toggle
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*
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* @param array $columns Menu item columns
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* @return array
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*/
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public static function _columns( $columns ) {
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$columns = array_merge( $columns, self::$fields );
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return $columns;
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}
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}
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Menu_Item_Custom_Fields_Example::init();
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