walk_page_dropdown_tree() WordPress Function

The walk_page_dropdown_tree() function walks through the pages in a WordPress site and outputs a dropdown menu of those pages. The function takes two arguments: the first is the depth of the pages to include in the menu (e.g. 0 for all pages, 1 for top-level pages only, 2 for top-level and second-level pages, etc.), and the second is an array of arguments to control the output of the menu. The walk_page_dropdown_tree() function is a great way to create a hierarchical navigation menu for a WordPress site. By default, the function will output a menu with all pages in the site, but the depth argument can be used to limit the menu to only top-level pages, or to a specific depth. The function also accepts an array of arguments to control the output of the menu, including the 'id', 'class', and 'selected' attributes.

walk_page_dropdown_tree( mixed $args ) #

function walk_page_dropdown_tree( ...$args ) {
	if ( empty( $args[2]['walker'] ) ) { // The user's options are the third parameter.
		$walker = new Walker_PageDropdown;
	} else {
		/**
		 * @var Walker $walker
		 */
		$walker = $args[2]['walker'];
	}

	return $walker->walk( ...$args );
}