Рубрика: WordPress

<?php
add_action( 'after_setup_theme', 'theme_register_nav_menu' );
function theme_register_nav_menu() {
	register_nav_menu( 'primary', 'Primary Menu' );
}

<?php
add_action( 'after_setup_theme', 'theme_register_nav_menus' );
function theme_register_nav_menus(){
	register_nav_menus( [
		'primary' => 'Primary Menu',
		'secondary' => 'Secondary Menu'
	] );
} );

<?php
wp_nav_menu( [
	'theme_location'  => '',
	'menu'            => '', 
	'container'       => 'div', 
	'container_class' => '', 
	'container_id'    => '',
	'container_aria_label' => '',
	'items_wrap' => '<ul id="%1$s" class="%2$s">%3$s</ul>',
	'menu_class'      => 'menu', 
	'menu_id'         => '',
	'echo'            => true,
	'fallback_cb'     => 'wp_page_menu',
	'before'          => '',
	'after'           => '',
	'link_before'     => '',
	'link_after'      => '',
	'depth'           => 0,
	'walker'          => '',
] );

<?php
class Walker_Nav_Menu extends Walker {
	/**
	 * What the class handles.
	 *
	 * @since 3.0.0
	 * @var string
	 *
	 * @see Walker::$tree_type
	 */
	public $tree_type = array( 'post_type', 'taxonomy', 'custom' );

	/**
	 * Database fields to use.
	 *
	 * @since 3.0.0
	 * @todo Decouple this.
	 * @var array
	 *
	 * @see Walker::$db_fields
	 */
	public $db_fields = array(
		'parent' => 'menu_item_parent',
		'id'     => 'db_id',
	);

	/**
	 * Starts the list before the elements are added.
	 *
	 * @since 3.0.0
	 *
	 * @see Walker::start_lvl()
	 *
	 * @param string   $output Used to append additional content (passed by reference).
	 * @param int      $depth  Depth of menu item. Used for padding.
	 * @param stdClass $args   An object of wp_nav_menu() arguments.
	 */
	public function start_lvl( &$output, $depth = 0, $args = null ) {
		if ( isset( $args->item_spacing ) && 'discard' === $args->item_spacing ) {
			$t = '';
			$n = '';
		} else {
			$t = "t";
			$n = "n";
		}
		$indent = str_repeat( $t, $depth );

		// Default class.
		$classes = array( 'sub-menu' );

		/**
		 * Filters the CSS class(es) applied to a menu list element.
		 *
		 * @since 4.8.0
		 *
		 * @param string[] $classes Array of the CSS classes that are applied to the menu `<ul>` element.
		 * @param stdClass $args    An object of `wp_nav_menu()` arguments.
		 * @param int      $depth   Depth of menu item. Used for padding.
		 */
		$class_names = join( ' ', apply_filters( 'nav_menu_submenu_css_class', $classes, $args, $depth ) );
		$class_names = $class_names ? ' class="' . esc_attr( $class_names ) . '"' : '';

		$output .= "{$n}{$indent}<ul$class_names>{$n}";
	}

	/**
	 * Ends the list of after the elements are added.
	 *
	 * @since 3.0.0
	 *
	 * @see Walker::end_lvl()
	 *
	 * @param string   $output Used to append additional content (passed by reference).
	 * @param int      $depth  Depth of menu item. Used for padding.
	 * @param stdClass $args   An object of wp_nav_menu() arguments.
	 */
	public function end_lvl( &$output, $depth = 0, $args = null ) {
		if ( isset( $args->item_spacing ) && 'discard' === $args->item_spacing ) {
			$t = '';
			$n = '';
		} else {
			$t = "t";
			$n = "n";
		}
		$indent  = str_repeat( $t, $depth );
		$output .= "$indent</ul>{$n}";
	}

	/**
	 * Starts the element output.
	 *
	 * @since 3.0.0
	 * @since 4.4.0 The {@see 'nav_menu_item_args'} filter was added.
	 *
	 * @see Walker::start_el()
	 *
	 * @param string   $output Used to append additional content (passed by reference).
	 * @param WP_Post  $item   Menu item data object.
	 * @param int      $depth  Depth of menu item. Used for padding.
	 * @param stdClass $args   An object of wp_nav_menu() arguments.
	 * @param int      $id     Current item ID.
	 */
	public function start_el( &$output, $item, $depth = 0, $args = null, $id = 0 ) {
		if ( isset( $args->item_spacing ) && 'discard' === $args->item_spacing ) {
			$t = '';
			$n = '';
		} else {
			$t = "t";
			$n = "n";
		}
		$indent = ( $depth ) ? str_repeat( $t, $depth ) : '';

		$classes   = empty( $item->classes ) ? array() : (array) $item->classes;
		$classes[] = 'menu-item-' . $item->ID;

		/**
		 * Filters the arguments for a single nav menu item.
		 *
		 * @since 4.4.0
		 *
		 * @param stdClass $args  An object of wp_nav_menu() arguments.
		 * @param WP_Post  $item  Menu item data object.
		 * @param int      $depth Depth of menu item. Used for padding.
		 */
		$args = apply_filters( 'nav_menu_item_args', $args, $item, $depth );

		/**
		 * Filters the CSS classes applied to a menu item's list item element.
		 *
		 * @since 3.0.0
		 * @since 4.1.0 The `$depth` parameter was added.
		 *
		 * @param string[] $classes Array of the CSS classes that are applied to the menu item's `<li>` element.
		 * @param WP_Post  $item    The current menu item.
		 * @param stdClass $args    An object of wp_nav_menu() arguments.
		 * @param int      $depth   Depth of menu item. Used for padding.
		 */
		$class_names = join( ' ', apply_filters( 'nav_menu_css_class', array_filter( $classes ), $item, $args, $depth ) );
		$class_names = $class_names ? ' class="' . esc_attr( $class_names ) . '"' : '';

		/**
		 * Filters the ID applied to a menu item's list item element.
		 *
		 * @since 3.0.1
		 * @since 4.1.0 The `$depth` parameter was added.
		 *
		 * @param string   $menu_id The ID that is applied to the menu item's `<li>` element.
		 * @param WP_Post  $item    The current menu item.
		 * @param stdClass $args    An object of wp_nav_menu() arguments.
		 * @param int      $depth   Depth of menu item. Used for padding.
		 */
		$id = apply_filters( 'nav_menu_item_id', 'menu-item-' . $item->ID, $item, $args, $depth );
		$id = $id ? ' id="' . esc_attr( $id ) . '"' : '';

		$output .= $indent . '<li' . $id . $class_names . '>';

		$atts           = array();
		$atts['title']  = ! empty( $item->attr_title ) ? $item->attr_title : '';
		$atts['target'] = ! empty( $item->target ) ? $item->target : '';
		if ( '_blank' === $item->target && empty( $item->xfn ) ) {
			$atts['rel'] = 'noopener noreferrer';
		} else {
			$atts['rel'] = $item->xfn;
		}
		$atts['href']         = ! empty( $item->url ) ? $item->url : '';
		$atts['aria-current'] = $item->current ? 'page' : '';

		/**
		 * Filters the HTML attributes applied to a menu item's anchor element.
		 *
		 * @since 3.6.0
		 * @since 4.1.0 The `$depth` parameter was added.
		 *
		 * @param array $atts {
		 *     The HTML attributes applied to the menu item's `<a>` element, empty strings are ignored.
		 *
		 *     @type string $title        Title attribute.
		 *     @type string $target       Target attribute.
		 *     @type string $rel          The rel attribute.
		 *     @type string $href         The href attribute.
		 *     @type string $aria_current The aria-current attribute.
		 * }
		 * @param WP_Post  $item  The current menu item.
		 * @param stdClass $args  An object of wp_nav_menu() arguments.
		 * @param int      $depth Depth of menu item. Used for padding.
		 */
		$atts = apply_filters( 'nav_menu_link_attributes', $atts, $item, $args, $depth );

		$attributes = '';
		foreach ( $atts as $attr => $value ) {
			if ( is_scalar( $value ) && '' !== $value && false !== $value ) {
				$value       = ( 'href' === $attr ) ? esc_url( $value ) : esc_attr( $value );
				$attributes .= ' ' . $attr . '="' . $value . '"';
			}
		}

		/** This filter is documented in wp-includes/post-template.php */
		$title = apply_filters( 'the_title', $item->title, $item->ID );

		/**
		 * Filters a menu item's title.
		 *
		 * @since 4.4.0
		 *
		 * @param string   $title The menu item's title.
		 * @param WP_Post  $item  The current menu item.
		 * @param stdClass $args  An object of wp_nav_menu() arguments.
		 * @param int      $depth Depth of menu item. Used for padding.
		 */
		$title = apply_filters( 'nav_menu_item_title', $title, $item, $args, $depth );

		$item_output  = $args->before;
		$item_output .= '<a' . $attributes . '>';
		$item_output .= $args->link_before . $title . $args->link_after;
		$item_output .= '</a>';
		$item_output .= $args->after;

		/**
		 * Filters a menu item's starting output.
		 *
		 * The menu item's starting output only includes `$args->before`, the opening `<a>`,
		 * the menu item's title, the closing `</a>`, and `$args->after`. Currently, there is
		 * no filter for modifying the opening and closing `<li>` for a menu item.
		 *
		 * @since 3.0.0
		 *
		 * @param string   $item_output The menu item's starting HTML output.
		 * @param WP_Post  $item        Menu item data object.
		 * @param int      $depth       Depth of menu item. Used for padding.
		 * @param stdClass $args        An object of wp_nav_menu() arguments.
		 */
		$output .= apply_filters( 'walker_nav_menu_start_el', $item_output, $item, $depth, $args );
	}

<ul class="main-menu">
  <li class="menu-item">POINT 1
    <ul class="sub-menu depth1">
      <li class="menu-item">
        <img src="path/to/image.png" alt="">
        <a href="#">POINT 1.1</a>
      </li>
    </ul>
  </li>
  <li class="menu-item">
    <a href="#">POINT 2</a>
  </li>
</ul>

<?php
add_action('save_post_nav_menu_item', 'save_nav_menu_item');

function save_nav_menu_item()
{
    if (isset($_POST['menu-item-thumbnail'])) {
        foreach ($_POST['menu-item-thumbnail'] as $key => $value) {
            add_post_meta($key, '_item_thumbnail', $value);
        }
    }
}

<?php
class Walker_Nav_Menu_Thumb extends Walker
{
    public $tree_type = array( 'post_type', 'taxonomy', 'custom' );

    public $db_fields = array(
        'parent' => 'menu_item_parent',
        'id'     => 'db_id',
    );

    public function start_lvl(&$output, $depth = 0, $args = null)
    {
        $classes = join(' ', ['sub-menu', 'depth' . $depth]);
        $output .= '<ul class="' . $classes . '">';
    }

    public function end_lvl(&$output, $depth = 0, $args = null)
    {
        $output .= "</ul>";
    }

    public function start_el(&$output, $item, $depth = 0, $args = null, $id = 0)
    {
        $url = ! empty($item->url) ? $item->url : '';
        $link = $this->has_children ? $item->title : '<a href="' . $url . '">' . $item->title . '</a>';
        $img = get_post_meta($item->ID, '_item_thumbnail', 1) ? '<img src="' . wp_get_attachment_url(get_post_meta($item->id, '_item_thumbnail', 1)) . '"/>' : '';
        $output .= '<li class="menu-item">' . $img . $link;
    }

    public function end_el(&$output, $item, $depth = 0, $args = null)
    {
        $output .= "</li>";
    }
}

<?php
wp_nav_menu([
	'theme_location' => 'primary',
	'container' => 0,
	'menu_class' => 'main-menu',
	'walker' => new Walker_Nav_Menu_Thumb
]);

<?php
add_filter('nav_menu_submenu_css_class', 'my_nav_menu_submenu_css_class', 10, 3);
function filter_function_name_8769($classes, $args, $depth)
{
    $classes[] = 'depth' . $depth;

    return $classes;
}

add_filter('nav_menu_item_args', 'my_nav_menu_item_args', 10, 2);
function my_nav_menu_item_args($args, $item)
{
    if ($id = get_post_meta($item->ID, '_item_thumbnail', 1)) {
        $args['before'] = '<img src="' . wp_get_attachment_url($id) . '"/>';
    }

    return $args;
}

add_filter('nav_menu_link_attributes', 'my_nav_menu_link_attributes', 10, 4);
function my_nav_menu_link_attributes($atts, $item, $args, $depth)
{
    $atts = ['href' => in_array('menu-item-has-children', $item->classes) ? '' : $atts['href']];

    return $atts;
}

add_filter('nav_menu_css_class', 'my_nav_menu_css_class', 10, 4);
function my_nav_menu_css_class($classes)
{
    $classes[] = 'menu-item';

    return $classes;
}