Walker_Nav_Menu::start_lvl( string $output, int $depth, stdClass $args = array() )

Starts the list before the elements are added.


Description Description

See also See also


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Parameters Parameters

$output

(string) (Required) Used to append additional content (passed by reference).

$depth

(int) (Required) Depth of menu item. Used for padding.

$args

(stdClass) (Optional) An object of wp_nav_menu() arguments.

Default value: array()


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Source Source

File: wp-includes/class-walker-nav-menu.php

	public function start_lvl( &$output, $depth = 0, $args = array() ) {
		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 array    $classes 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}";
	}

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Changelog Changelog

Changelog
Version Description
3.0.0 Introduced.


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