*
*
* Plugin name: Menu Item Custom Fields Example
* Plugin URI: https://github.com/kucrut/wp-menu-item-custom-fields
* Description: Example usage of Menu Item Custom Fields in plugins/themes
* Version: 0.2.0
* Author: Dzikri Aziz
* Author URI: http://kucrut.org/
* License: GPL v2
* Text Domain: menu-item-custom-fields-example
*/
/**
* Sample menu item metadata
*
* This class demonstrate the usage of Menu Item Custom Fields in plugins/themes.
*
* @since 0.1.0
*/
class LawCarta_Menu_Item_Custom_Fields {
/**
* Holds our custom fields
*
* @var array
* @access protected
* @since Menu_Item_Custom_Fields_Example 0.2.0
*/
protected static $fields = array();
protected static $templates = [
'text' => '',
];
/**
* Initialize plugin
*/
public static function init() {
add_action( 'wp_nav_menu_item_custom_fields', array( __CLASS__, '_fields' ), 10, 4 );
add_action( 'wp_update_nav_menu_item', array( __CLASS__, '_save' ), 10, 3 );
self::$fields = array(
'a-classes' => [
'label' => __('Anchor Classes', 'lawcarta'),
'type' => 'text'
],
'icon-classes' => [
'label' => __('Icon Classes', 'lawcarta'),
'type' => 'text'
],
);
}
/**
* Save custom field value
*
* @wp_hook action wp_update_nav_menu_item
*
* @param int $menu_id Nav menu ID
* @param int $menu_item_db_id Menu item ID
* @param array $menu_item_args Menu item data
*/
public static function _save( $menu_id, $menu_item_db_id, $menu_item_args ) {
if ( defined( 'DOING_AJAX' ) && DOING_AJAX ) {
return;
}
check_admin_referer( 'update-nav_menu', 'update-nav-menu-nonce' );
foreach ( self::$fields as $field => $config ) {
$key = sprintf( 'menu-item-%s', $field );
// Sanitize
if ( ! empty( $_POST[ $key ][ $menu_item_db_id ] ) ) {
$value = $_POST[ $key ][ $menu_item_db_id ];
if ($config['type'] === 'checkbox') {
$value = (bool) $value;
}
} else {
$value = null;
}
// Update
if ( ! is_null( $value ) ) {
update_post_meta( $menu_item_db_id, $key, $value );
} else {
delete_post_meta( $menu_item_db_id, $key );
}
}
}
/**
* Print field
*
* @param object $item Menu item data object.
* @param int $depth Depth of menu item. Used for padding.
* @param array $args Menu item args.
* @param int $id Nav menu ID.
*
* @return string Form fields
*/
public static function _fields( $id, $item, $depth, $args ) {
foreach ( self::$fields as $field => $config ) :
$key = sprintf( 'menu-item-%s', $field );
$id = sprintf( 'edit-%s-%s', $key, $item->ID );
$name = sprintf( '%s[%s]', $key, $item->ID );
$value = get_post_meta( $item->ID, $key, true );
$class = sprintf( 'field-%s', $field );
$extra = '';
if ($config['type'] === 'checkbox') {
if ($value) {
$extra = 'checked="checked"';
}
$value = 1;
}
?>
$config ) {
$key = sprintf( 'menu-item-%s', $field );
$value = get_post_meta( $item->ID, $key, true );
if (!empty($value)) {
if ($config['type'] === 'checkbox') {
$value = (bool) $value;
}
$meta[$field] = $value;
}
}
return $meta;
}
}
LawCarta_Menu_Item_Custom_Fields::init();