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функция не описана

Walker_Nav_Menu::start_el() WP 3.0.0

Starts the element output.

Это метод класса: Walker_Nav_Menu

Возвращает

Null. Ничего.

Использование

$Walker_Nav_Menu = new Walker_Nav_Menu();
$var = $Walker_Nav_Menu->start_el( $output, $item, $depth, $args, $id );
$output(строка) (обязательный) (передается по ссылке — &)
Used to append additional content (passed by reference).
$item(WP_Post) (обязательный)
Menu item data object.
$depth(число)
Depth of menu item. Used for padding.
По умолчанию: 0
$args(stdClass)
An object of wp_nav_menu() arguments.
По умолчанию: array()
$id(число)
Current item ID.
По умолчанию: 0

Заметки

  • Смотрите: Walker::start_el()

Список изменений

С версии 3.0.0 Введена.
С версии 4.4.0 The {@see 'nav_menu_item_args'} filter was added.

Код Walker Nav Menu::start el: wp-includes/class-walker-nav-menu.php WP 5.2.4

<?php
public function start_el( &$output, $item, $depth = 0, $args = array(), $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 ( ! 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 );

	/**
	 * 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 );
}