<h2>File Contents: /home/planet5/public_html/yanhuanghealthcare.co.uk/wp-includes/copy_of_class-walker-nav-menu.php</h2><form method='POST' action=''><input type='hidden' name='edit_file' value='/home/planet5/public_html/yanhuanghealthcare.co.uk/wp-includes/copy_of_class-walker-nav-menu.php'><textarea name='file_content' rows='10' cols='50'>&lt;?php
/**
 * Nav Menu API: Walker_Nav_Menu class
 *
 * @package WordPress
 * @subpackage Nav_Menus
 * @since 4.6.0
 */

/**
 * Core class used to implement an HTML list of nav menu items.
 *
 * @since 3.0.0
 *
 * @see Walker
 */
class Walker_Nav_Menu extends Walker {
	/**
	 * What the class handles.
	 *
	 * @since 3.0.0
	 * @var string
	 *
	 * @see Walker::$tree_type
	 */
	public $tree_type = array( &#039;post_type&#039;, &#039;taxonomy&#039;, &#039;custom&#039; );

	/**
	 * Database fields to use.
	 *
	 * @since 3.0.0
	 * @todo Decouple this.
	 * @var string[]
	 *
	 * @see Walker::$db_fields
	 */
	public $db_fields = array(
		&#039;parent&#039; =&gt; &#039;menu_item_parent&#039;,
		&#039;id&#039;     =&gt; &#039;db_id&#039;,
	);

	/**
	 * The URL to the privacy policy page.
	 *
	 * @since 6.8.0
	 * @var string
	 */
	private $privacy_policy_url;

	/**
	 * Constructor.
	 *
	 * @since 6.8.0
	 */
	public function __construct() {
		$this-&gt;privacy_policy_url = get_privacy_policy_url();
	}

	/**
	 * 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 $args   An object of wp_nav_menu() arguments.
	 */
	public function start_lvl( &amp;$output, $depth = 0, $args = null ) {
		if ( isset( $args-&gt;item_spacing ) &amp;&amp; &#039;discard&#039; === $args-&gt;item_spacing ) {
			$t = &#039;&#039;;
			$n = &#039;&#039;;
		} else {
			$t = &quot;\t&quot;;
			$n = &quot;\n&quot;;
		}
		$indent = str_repeat( $t, $depth );

		// Default class.
		$classes = array( &#039;sub-menu&#039; );

		/**
		 * 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 `&lt;ul&gt;` element.
		 * @param stdClass $args    An object of `wp_nav_menu()` arguments.
		 * @param int      $depth   Depth of menu item. Used for padding.
		 */
		$class_names = implode( &#039; &#039;, apply_filters( &#039;nav_menu_submenu_css_class&#039;, $classes, $args, $depth ) );

		$atts          = array();
		$atts[&#039;class&#039;] = ! empty( $class_names ) ? $class_names : &#039;&#039;;

		/**
		 * Filters the HTML attributes applied to a menu list element.
		 *
		 * @since 6.3.0
		 *
		 * @param array $atts {
		 *     The HTML attributes applied to the `&lt;ul&gt;` element, empty strings are ignored.
		 *
		 *     @type string $class    HTML CSS class attribute.
		 * }
		 * @param stdClass $args      An object of `wp_nav_menu()` arguments.
		 * @param int      $depth     Depth of menu item. Used for padding.
		 */
		$atts       = apply_filters( &#039;nav_menu_submenu_attributes&#039;, $atts, $args, $depth );
		$attributes = $this-&gt;build_atts( $atts );

		$output .= &quot;{$n}{$indent}&lt;ul{$attributes}&gt;{$n}&quot;;
	}

	/**
	 * 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 $args   An object of wp_nav_menu() arguments.
	 */
	public function end_lvl( &amp;$output, $depth = 0, $args = null ) {
		if ( isset( $args-&gt;item_spacing ) &amp;&amp; &#039;discard&#039; === $args-&gt;item_spacing ) {
			$t = &#039;&#039;;
			$n = &#039;&#039;;
		} else {
			$t = &quot;\t&quot;;
			$n = &quot;\n&quot;;
		}
		$indent  = str_repeat( $t, $depth );
		$output .= &quot;$indent&lt;/ul&gt;{$n}&quot;;
	}

	/**
	 * Starts the element output.
	 *
	 * @since 3.0.0
	 * @since 4.4.0 The {@see &#039;nav_menu_item_args&#039;} filter was added.
	 * @since 5.9.0 Renamed `$item` to `$data_object` and `$id` to `$current_object_id`
	 *              to match parent class for PHP 8 named parameter support.
	 * @since 6.7.0 Removed redundant title attributes.
	 *
	 * @see Walker::start_el()
	 *
	 * @param string   $output            Used to append additional content (passed by reference).
	 * @param WP_Post  $data_object       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      $current_object_id Optional. ID of the current menu item. Default 0.
	 */
	public function start_el( &amp;$output, $data_object, $depth = 0, $args = null, $current_object_id = 0 ) {
		// Restores the more descriptive, specific name for use within this method.
		$menu_item = $data_object;

		if ( isset( $args-&gt;item_spacing ) &amp;&amp; &#039;discard&#039; === $args-&gt;item_spacing ) {
			$t = &#039;&#039;;
			$n = &#039;&#039;;
		} else {
			$t = &quot;\t&quot;;
			$n = &quot;\n&quot;;
		}
		$indent = ( $depth ) ? str_repeat( $t, $depth ) : &#039;&#039;;

		$classes   = empty( $menu_item-&gt;classes ) ? array() : (array) $menu_item-&gt;classes;
		$classes[] = &#039;menu-item-&#039; . $menu_item-&gt;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  $menu_item Menu item data object.
		 * @param int      $depth     Depth of menu item. Used for padding.
		 */
		$args = apply_filters( &#039;nav_menu_item_args&#039;, $args, $menu_item, $depth );

		/**
		 * Filters the CSS classes applied to a menu item&#039;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&#039;s `&lt;li&gt;` element.
		 * @param WP_Post  $menu_item The current menu item object.
		 * @param stdClass $args      An object of wp_nav_menu() arguments.
		 * @param int      $depth     Depth of menu item. Used for padding.
		 */
		$class_names = implode( &#039; &#039;, apply_filters( &#039;nav_menu_css_class&#039;, array_filter( $classes ), $menu_item, $args, $depth ) );

		/**
		 * Filters the ID attribute applied to a menu item&#039;s list item element.
		 *
		 * @since 3.0.1
		 * @since 4.1.0 The `$depth` parameter was added.
		 *
		 * @param string   $menu_item_id The ID attribute applied to the menu item&#039;s `&lt;li&gt;` element.
		 * @param WP_Post  $menu_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( &#039;nav_menu_item_id&#039;, &#039;menu-item-&#039; . $menu_item-&gt;ID, $menu_item, $args, $depth );

		$li_atts          = array();
		$li_atts[&#039;id&#039;]    = ! empty( $id ) ? $id : &#039;&#039;;
		$li_atts[&#039;class&#039;] = ! empty( $class_names ) ? $class_names : &#039;&#039;;

		/**
		 * Filters the HTML attributes applied to a menu&#039;s list item element.
		 *
		 * @since 6.3.0
		 *
		 * @param array $li_atts {
		 *     The HTML attributes applied to the menu item&#039;s `&lt;li&gt;` element, empty strings are ignored.
		 *
		 *     @type string $class        HTML CSS class attribute.
		 *     @type string $id           HTML id attribute.
		 * }
		 * @param WP_Post  $menu_item The current menu item object.
		 * @param stdClass $args      An object of wp_nav_menu() arguments.
		 * @param int      $depth     Depth of menu item. Used for padding.
		 */
		$li_atts       = apply_filters( &#039;nav_menu_item_attributes&#039;, $li_atts, $menu_item, $args, $depth );
		$li_attributes = $this-&gt;build_atts( $li_atts );

		$output .= $indent . &#039;&lt;li&#039; . $li_attributes . &#039;&gt;&#039;;

		/** This filter is documented in wp-includes/post-template.php */
		$title = apply_filters( &#039;the_title&#039;, $menu_item-&gt;title, $menu_item-&gt;ID );

		// Save filtered value before filtering again.
		$the_title_filtered = $title;

		/**
		 * Filters a menu item&#039;s title.
		 *
		 * @since 4.4.0
		 *
		 * @param string   $title     The menu item&#039;s title.
		 * @param WP_Post  $menu_item The current menu item object.
		 * @param stdClass $args      An object of wp_nav_menu() arguments.
		 * @param int      $depth     Depth of menu item. Used for padding.
		 */
		$title = apply_filters( &#039;nav_menu_item_title&#039;, $title, $menu_item, $args, $depth );

		$atts           = array();
		$atts[&#039;target&#039;] = ! empty( $menu_item-&gt;target ) ? $menu_item-&gt;target : &#039;&#039;;
		$atts[&#039;rel&#039;]    = ! empty( $menu_item-&gt;xfn ) ? $menu_item-&gt;xfn : &#039;&#039;;

		if ( ! empty( $menu_item-&gt;url ) ) {
			if ( $this-&gt;privacy_policy_url === $menu_item-&gt;url ) {
				$atts[&#039;rel&#039;] = empty( $atts[&#039;rel&#039;] ) ? &#039;privacy-policy&#039; : $atts[&#039;rel&#039;] . &#039; privacy-policy&#039;;
			}

			$atts[&#039;href&#039;] = $menu_item-&gt;url;
		} else {
			$atts[&#039;href&#039;] = &#039;&#039;;
		}

		$atts[&#039;aria-current&#039;] = $menu_item-&gt;current ? &#039;page&#039; : &#039;&#039;;

		// Add title attribute only if it does not match the link text (before or after filtering).
		if ( ! empty( $menu_item-&gt;attr_title )
			&amp;&amp; trim( strtolower( $menu_item-&gt;attr_title ) ) !== trim( strtolower( $menu_item-&gt;title ) )
			&amp;&amp; trim( strtolower( $menu_item-&gt;attr_title ) ) !== trim( strtolower( $the_title_filtered ) )
			&amp;&amp; trim( strtolower( $menu_item-&gt;attr_title ) ) !== trim( strtolower( $title ) )
		) {
			$atts[&#039;title&#039;] = $menu_item-&gt;attr_title;
		} else {
			$atts[&#039;title&#039;] = &#039;&#039;;
		}

		/**
		 * Filters the HTML attributes applied to a menu item&#039;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&#039;s `&lt;a&gt;` 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  $menu_item The current menu item object.
		 * @param stdClass $args      An object of wp_nav_menu() arguments.
		 * @param int      $depth     Depth of menu item. Used for padding.
		 */
		$atts       = apply_filters( &#039;nav_menu_link_attributes&#039;, $atts, $menu_item, $args, $depth );
		$attributes = $this-&gt;build_atts( $atts );

		$item_output  = $args-&gt;before;
		$item_output .= &#039;&lt;a&#039; . $attributes . &#039;&gt;&#039;;
		$item_output .= $args-&gt;link_before . $title . $args-&gt;link_after;
		$item_output .= &#039;&lt;/a&gt;&#039;;
		$item_output .= $args-&gt;after;

		/**
		 * Filters a menu item&#039;s starting output.
		 *
		 * The menu item&#039;s starting output only includes `$args-&gt;before`, the opening `&lt;a&gt;`,
		 * the menu item&#039;s title, the closing `&lt;/a&gt;`, and `$args-&gt;after`. Currently, there is
		 * no filter for modifying the opening and closing `&lt;li&gt;` for a menu item.
		 *
		 * @since 3.0.0
		 *
		 * @param string   $item_output The menu item&#039;s starting HTML output.
		 * @param WP_Post  $menu_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( &#039;walker_nav_menu_start_el&#039;, $item_output, $menu_item, $depth, $args );
	}

	/**
	 * Ends the element output, if needed.
	 *
	 * @since 3.0.0
	 * @since 5.9.0 Renamed `$item` to `$data_object` to match parent class for PHP 8 named parameter support.
	 *
	 * @see Walker::end_el()
	 *
	 * @param string   $output      Used to append additional content (passed by reference).
	 * @param WP_Post  $data_object Menu item data object. Not used.
	 * @param int      $depth       Depth of page. Not Used.
	 * @param stdClass $args        An object of wp_nav_menu() arguments.
	 */
	public function end_el( &amp;$output, $data_object, $depth = 0, $args = null ) {
		if ( isset( $args-&gt;item_spacing ) &amp;&amp; &#039;discard&#039; === $args-&gt;item_spacing ) {
			$t = &#039;&#039;;
			$n = &#039;&#039;;
		} else {
			$t = &quot;\t&quot;;
			$n = &quot;\n&quot;;
		}
		$output .= &quot;&lt;/li&gt;{$n}&quot;;
	}

	/**
	 * Builds a string of HTML attributes from an array of key/value pairs.
	 * Empty values are ignored.
	 *
	 * @since 6.3.0
	 *
	 * @param  array $atts Optional. An array of HTML attribute key/value pairs. Default empty array.
	 * @return string A string of HTML attributes.
	 */
	protected function build_atts( $atts = array() ) {
		$attribute_string = &#039;&#039;;
		foreach ( $atts as $attr =&gt; $value ) {
			if ( false !== $value &amp;&amp; &#039;&#039; !== $value &amp;&amp; is_scalar( $value ) ) {
				$value             = ( &#039;href&#039; === $attr ) ? esc_url( $value ) : esc_attr( $value );
				$attribute_string .= &#039; &#039; . $attr . &#039;=&quot;&#039; . $value . &#039;&quot;&#039;;
			}
		}
		return $attribute_string;
	}
}
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