Wordpress - Untertitel zum mobilen Menü aus benutzerdefinierten Feld

Question

Ich versuche, Untertitel zu meinen mobilen Menüelemente zeigen.

Dafür habe ich ein benutzerdefiniertes Feld erstellt, um als page_subheading für jede Seite anzuzeigen.

Ich kann den Wert dieses benutzerdefinierten Felds mit pageId abrufen. Ich kann diese Unterüberschrift jedoch nicht an das Menü anhängen.

Ich habe das der folgende Code versucht,

wp_nav_menu(array(
     'theme_location' => 'mobile_menu_alt', 
     'menu_class'  => 'dropdown-menu', 
     'fallback_cb' => false, 
     'link_after'  => '</span><div class="subheading">'.$subheading.'</a></div>', 
    )); 

Hier ist mein Menü nenne und das Hinzufügen der Tarifstelle nach dem Menü-Link. Aber ich bin nicht in der Lage, es dynamisch zu geben. Gibt es eine Möglichkeit, $subheading dynamisch Wert zu geben.

Answer 1

Versuchen, diese zu functions.php

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

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

/** 
* Starts the list before the elements are added. 
* 
* @see Walker::start_lvl() 
* 
* @since 3.0.0 
* 
* @param string $output Passed by reference. Used to append additional content. 
* @param int $depth Depth of menu item. Used for padding. 
* @param array $args An array of arguments. @see wp_nav_menu() 
*/ 
public function start_lvl(&$output, $depth = 0, $args = array()) { 
    $indent = str_repeat("\t", $depth); 
    $output .= "\n$indent<ul class=\"sub-menu\">\n"; 
} 

/** 
* Ends the list of after the elements are added. 
* 
* @see Walker::end_lvl() 
* 
* @since 3.0.0 
* 
* @param string $output Passed by reference. Used to append additional content. 
* @param int $depth Depth of menu item. Used for padding. 
* @param array $args An array of arguments. @see wp_nav_menu() 
*/ 
public function end_lvl(&$output, $depth = 0, $args = array()) { 
    $indent = str_repeat("\t", $depth); 
    $output .= "$indent</ul>\n"; 
} 

/** 
* Start the element output. 
* 
* @see Walker::start_el() 
* 
* @since 3.0.0 
* @since 4.4.0 'nav_menu_item_args' filter was added. 
* 
* @param string $output Passed by reference. Used to append additional content. 
* @param object $item Menu item data object. 
* @param int $depth Depth of menu item. Used for padding. 
* @param array $args An array of arguments. @see wp_nav_menu() 
* @param int $id  Current item ID. 
*/ 
public function start_el(&$output, $item, $depth = 0, $args = array(), $id = 0) { 
    $indent = ($depth) ? str_repeat("\t", $depth) : ''; 

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

    /** 
    * Filter the arguments for a single nav menu item. 
    * 
    * @since 4.4.0 
    * 
    * @param array $args An array of arguments. 
    * @param object $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); 

    /** 
    * Filter the CSS class(es) applied to a menu item's list item element. 
    * 
    * @since 3.0.0 
    * @since 4.1.0 The `$depth` parameter was added. 
    * 
    * @param array $classes The CSS classes that are applied to the menu item's `<li>` element. 
    * @param object $item The current menu item. 
    * @param array $args An array of {@see 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) . '"' : ''; 

    /** 
    * Filter 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 object $item The current menu item. 
    * @param array $args An array of {@see 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  : ''; 
    $atts['rel'] = ! empty($item->xfn)  ? $item->xfn  : ''; 
    $atts['href'] = ! empty($item->url)  ? $item->url  : ''; 

    /** 
    * Filter 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. 
    * } 
    * @param object $item The current menu item. 
    * @param array $args An array of {@see 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 => $value) { 
     if (! empty($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); 

    /** 
    * Filter a menu item's title. 
    * 
    * @since 4.4.0 
    * 
    * @param string $title The menu item's title. 
    * @param object $item The current menu item. 
    * @param array $args An array of {@see 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); 

      $subheading = get_post_meta($item->ID, 'subheading', true); 

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

    /** 
    * Filter 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 object $item  Menu item data object. 
    * @param int $depth  Depth of menu item. Used for padding. 
    * @param array $args  An array of {@see wp_nav_menu()} arguments. 
    */ 
    $output .= apply_filters('walker_nav_menu_start_el', $item_output, $item, $depth, $args); 
} 

/** 
* Ends the element output, if needed. 
* 
* @see Walker::end_el() 
* 
* @since 3.0.0 
* 
* @param string $output Passed by reference. Used to append additional content. 
* @param object $item Page data object. Not used. 
* @param int $depth Depth of page. Not Used. 
* @param array $args An array of arguments. @see wp_nav_menu() 
*/ 
public function end_el(&$output, $item, $depth = 0, $args = array()) { 
    $output .= "</li>\n"; 
} 

} // Walker_Nav_Menu_subheading 

und diese in Ihre Themendatei, wie heading.php

wp_nav_menu(array(
    'theme_location' => 'mobile_menu_alt', 
    'menu_class'  => 'dropdown-menu', 
    'fallback_cb' => false, 
    'walker'   => new Walker_Nav_Menu_subheading() 
)); 

es bindet mit dem post_meta Namen ‚Untertitel‘ ....

Alles, was ich getan habe, war eine Kopie der Standard-WordPress und änderte, wie das After-Bit funktioniert.

diese Linien

$subheading = get_post_meta($item->ID, 'subheading', true); 

$item_output = $args->before; 
$item_output .= '<a'. $attributes .'>'; 
$item_output .= $args->link_before . $title . "<span 'subheading'>" . $subheading . "</span>";