Mục menu hoạt động PHP

Ví dụ này sẽ loại bỏ danh sách không có thứ tự bao quanh các mục danh sách. Việc thay thế HTML bọc bằng trình xác định

wp_nav_menu[ array[
	'menu'   => 'Something custom walker',
	'walker' => new WPDocs_Walker_Nav_Menu[]
] ];

/**
 * Custom walker class.
 */
class WPDocs_Walker_Nav_Menu extends Walker_Nav_Menu {

	/**
	 * Starts the list before the elements are added.
	 *
	 * Adds classes to the unordered list sub-menus.
	 *
	 * @param string $output Passed by reference. Used to append additional content.
	 * @param int    $depth  Depth of menu item. Used for padding.
	 * @param array  $args   An array of arguments. @see wp_nav_menu[]
	 */
	function start_lvl[ &$output, $depth = 0, $args = array[] ] {
		// Depth-dependent classes.
		$indent = [ $depth > 0  ? str_repeat[ "\t", $depth ] : '' ]; // code indent
		$display_depth = [ $depth + 1]; // because it counts the first submenu as 0
		$classes = array[
			'sub-menu',
			[ $display_depth % 2  ? 'menu-odd' : 'menu-even' ],
			[ $display_depth >=2 ? 'sub-sub-menu' : '' ],
			'menu-depth-' . $display_depth
		];
		$class_names = implode[ ' ', $classes ];

		// Build HTML for output.
		$output .= "\n" . $indent . '
' . "\n";
	}

	/**
	 * Start the element output.
	 *
	 * Adds main/sub-classes to the list items and links.
	 *
	 * @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    $id     Current item ID.
	 */
	function start_el[ &$output, $item, $depth = 0, $args = array[], $id = 0 ] {
		global $wp_query;
		$indent = [ $depth > 0 ? str_repeat[ "\t", $depth ] : '' ]; // code indent

		// Depth-dependent classes.
		$depth_classes = array[
			[ $depth == 0 ? 'main-menu-item' : 'sub-menu-item' ],
			[ $depth >=2 ? 'sub-sub-menu-item' : '' ],
			[ $depth % 2 ? 'menu-item-odd' : 'menu-item-even' ],
			'menu-item-depth-' . $depth
		];
		$depth_class_names = esc_attr[ implode[ ' ', $depth_classes ] ];

		// Passed classes.
		$classes = empty[ $item->classes ] ? array[] : [array] $item->classes;
		$class_names = esc_attr[ implode[ ' ', apply_filters[ 'nav_menu_css_class', array_filter[ $classes ], $item ] ] ];

		// Build HTML.
		$output .= $indent . '
';

		// Link attributes.
		$attributes  = ! empty[ $item->attr_title ] ? ' title="'  . esc_attr[ $item->attr_title ] .'"' : '';
		$attributes .= ! empty[ $item->target ]     ? ' target="' . esc_attr[ $item->target     ] .'"' : '';
		$attributes .= ! empty[ $item->xfn ]        ? ' rel="'    . esc_attr[ $item->xfn        ] .'"' : '';
		$attributes .= ! empty[ $item->url ]        ? ' href="'   . esc_attr[ $item->url        ] .'"' : '';
		$attributes .= ' class="menu-link ' . [ $depth > 0 ? 'sub-menu-link' : 'main-menu-link' ] . '"';

		// Build HTML output and pass through the proper filter.
		$item_output = sprintf[ '%1$s%3$s%4$s%5$s%6$s',
			$args->before,
			$attributes,
			$args->link_before,
			apply_filters[ 'the_title', $item->title, $item->ID ],
			$args->link_after,
			$args->after
		];
		$output .= apply_filters[ 'walker_nav_menu_start_el', $item_output, $item, $depth, $args ];
	}
}

wp_nav_menu[ array[
	'menu'   => 'Something custom walker',
	'walker' => new WPDocs_Walker_Nav_Menu[]
] ];

/**
 * Custom walker class.
 */
class WPDocs_Walker_Nav_Menu extends Walker_Nav_Menu {

	/**
	 * Starts the list before the elements are added.
	 *
	 * Adds classes to the unordered list sub-menus.
	 *
	 * @param string $output Passed by reference. Used to append additional content.
	 * @param int    $depth  Depth of menu item. Used for padding.
	 * @param array  $args   An array of arguments. @see wp_nav_menu[]
	 */
	function start_lvl[ &$output, $depth = 0, $args = array[] ] {
		// Depth-dependent classes.
		$indent = [ $depth > 0  ? str_repeat[ "\t", $depth ] : '' ]; // code indent
		$display_depth = [ $depth + 1]; // because it counts the first submenu as 0
		$classes = array[
			'sub-menu',
			[ $display_depth % 2  ? 'menu-odd' : 'menu-even' ],
			[ $display_depth >=2 ? 'sub-sub-menu' : '' ],
			'menu-depth-' . $display_depth
		];
		$class_names = implode[ ' ', $classes ];

		// Build HTML for output.
		$output .= "\n" . $indent . '
' . "\n";
	}

	/**
	 * Start the element output.
	 *
	 * Adds main/sub-classes to the list items and links.
	 *
	 * @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    $id     Current item ID.
	 */
	function start_el[ &$output, $item, $depth = 0, $args = array[], $id = 0 ] {
		global $wp_query;
		$indent = [ $depth > 0 ? str_repeat[ "\t", $depth ] : '' ]; // code indent

		// Depth-dependent classes.
		$depth_classes = array[
			[ $depth == 0 ? 'main-menu-item' : 'sub-menu-item' ],
			[ $depth >=2 ? 'sub-sub-menu-item' : '' ],
			[ $depth % 2 ? 'menu-item-odd' : 'menu-item-even' ],
			'menu-item-depth-' . $depth
		];
		$depth_class_names = esc_attr[ implode[ ' ', $depth_classes ] ];

		// Passed classes.
		$classes = empty[ $item->classes ] ? array[] : [array] $item->classes;
		$class_names = esc_attr[ implode[ ' ', apply_filters[ 'nav_menu_css_class', array_filter[ $classes ], $item ] ] ];

		// Build HTML.
		$output .= $indent . '
';

		// Link attributes.
		$attributes  = ! empty[ $item->attr_title ] ? ' title="'  . esc_attr[ $item->attr_title ] .'"' : '';
		$attributes .= ! empty[ $item->target ]     ? ' target="' . esc_attr[ $item->target     ] .'"' : '';
		$attributes .= ! empty[ $item->xfn ]        ? ' rel="'    . esc_attr[ $item->xfn        ] .'"' : '';
		$attributes .= ! empty[ $item->url ]        ? ' href="'   . esc_attr[ $item->url        ] .'"' : '';
		$attributes .= ' class="menu-link ' . [ $depth > 0 ? 'sub-menu-link' : 'main-menu-link' ] . '"';

		// Build HTML output and pass through the proper filter.
		$item_output = sprintf[ '%1$s%3$s%4$s%5$s%6$s',
			$args->before,
			$attributes,
			$args->link_before,
			apply_filters[ 'the_title', $item->title, $item->ID ],
			$args->link_after,
			$args->after
		];
		$output .= apply_filters[ 'walker_nav_menu_start_el', $item_output, $item, $depth, $args ];
	}
}

wp_nav_menu[ array[
	'menu'   => 'Something custom walker',
	'walker' => new WPDocs_Walker_Nav_Menu[]
] ];

/**
 * Custom walker class.
 */
class WPDocs_Walker_Nav_Menu extends Walker_Nav_Menu {

	/**
	 * Starts the list before the elements are added.
	 *
	 * Adds classes to the unordered list sub-menus.
	 *
	 * @param string $output Passed by reference. Used to append additional content.
	 * @param int    $depth  Depth of menu item. Used for padding.
	 * @param array  $args   An array of arguments. @see wp_nav_menu[]
	 */
	function start_lvl[ &$output, $depth = 0, $args = array[] ] {
		// Depth-dependent classes.
		$indent = [ $depth > 0  ? str_repeat[ "\t", $depth ] : '' ]; // code indent
		$display_depth = [ $depth + 1]; // because it counts the first submenu as 0
		$classes = array[
			'sub-menu',
			[ $display_depth % 2  ? 'menu-odd' : 'menu-even' ],
			[ $display_depth >=2 ? 'sub-sub-menu' : '' ],
			'menu-depth-' . $display_depth
		];
		$class_names = implode[ ' ', $classes ];

		// Build HTML for output.
		$output .= "\n" . $indent . '
' . "\n";
	}

	/**
	 * Start the element output.
	 *
	 * Adds main/sub-classes to the list items and links.
	 *
	 * @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    $id     Current item ID.
	 */
	function start_el[ &$output, $item, $depth = 0, $args = array[], $id = 0 ] {
		global $wp_query;
		$indent = [ $depth > 0 ? str_repeat[ "\t", $depth ] : '' ]; // code indent

		// Depth-dependent classes.
		$depth_classes = array[
			[ $depth == 0 ? 'main-menu-item' : 'sub-menu-item' ],
			[ $depth >=2 ? 'sub-sub-menu-item' : '' ],
			[ $depth % 2 ? 'menu-item-odd' : 'menu-item-even' ],
			'menu-item-depth-' . $depth
		];
		$depth_class_names = esc_attr[ implode[ ' ', $depth_classes ] ];

		// Passed classes.
		$classes = empty[ $item->classes ] ? array[] : [array] $item->classes;
		$class_names = esc_attr[ implode[ ' ', apply_filters[ 'nav_menu_css_class', array_filter[ $classes ], $item ] ] ];

		// Build HTML.
		$output .= $indent . '
';

		// Link attributes.
		$attributes  = ! empty[ $item->attr_title ] ? ' title="'  . esc_attr[ $item->attr_title ] .'"' : '';
		$attributes .= ! empty[ $item->target ]     ? ' target="' . esc_attr[ $item->target     ] .'"' : '';
		$attributes .= ! empty[ $item->xfn ]        ? ' rel="'    . esc_attr[ $item->xfn        ] .'"' : '';
		$attributes .= ! empty[ $item->url ]        ? ' href="'   . esc_attr[ $item->url        ] .'"' : '';
		$attributes .= ' class="menu-link ' . [ $depth > 0 ? 'sub-menu-link' : 'main-menu-link' ] . '"';

		// Build HTML output and pass through the proper filter.
		$item_output = sprintf[ '%1$s%3$s%4$s%5$s%6$s',
			$args->before,
			$attributes,
			$args->link_before,
			apply_filters[ 'the_title', $item->title, $item->ID ],
			$args->link_after,
			$args->after
		];
		$output .= apply_filters[ 'walker_nav_menu_start_el', $item_output, $item, $depth, $args ];
	}
}

wp_nav_menu[ array[
	'menu'   => 'Something custom walker',
	'walker' => new WPDocs_Walker_Nav_Menu[]
] ];

/**
 * Custom walker class.
 */
class WPDocs_Walker_Nav_Menu extends Walker_Nav_Menu {

	/**
	 * Starts the list before the elements are added.
	 *
	 * Adds classes to the unordered list sub-menus.
	 *
	 * @param string $output Passed by reference. Used to append additional content.
	 * @param int    $depth  Depth of menu item. Used for padding.
	 * @param array  $args   An array of arguments. @see wp_nav_menu[]
	 */
	function start_lvl[ &$output, $depth = 0, $args = array[] ] {
		// Depth-dependent classes.
		$indent = [ $depth > 0  ? str_repeat[ "\t", $depth ] : '' ]; // code indent
		$display_depth = [ $depth + 1]; // because it counts the first submenu as 0
		$classes = array[
			'sub-menu',
			[ $display_depth % 2  ? 'menu-odd' : 'menu-even' ],
			[ $display_depth >=2 ? 'sub-sub-menu' : '' ],
			'menu-depth-' . $display_depth
		];
		$class_names = implode[ ' ', $classes ];

		// Build HTML for output.
		$output .= "\n" . $indent . '
' . "\n";
	}

	/**
	 * Start the element output.
	 *
	 * Adds main/sub-classes to the list items and links.
	 *
	 * @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    $id     Current item ID.
	 */
	function start_el[ &$output, $item, $depth = 0, $args = array[], $id = 0 ] {
		global $wp_query;
		$indent = [ $depth > 0 ? str_repeat[ "\t", $depth ] : '' ]; // code indent

		// Depth-dependent classes.
		$depth_classes = array[
			[ $depth == 0 ? 'main-menu-item' : 'sub-menu-item' ],
			[ $depth >=2 ? 'sub-sub-menu-item' : '' ],
			[ $depth % 2 ? 'menu-item-odd' : 'menu-item-even' ],
			'menu-item-depth-' . $depth
		];
		$depth_class_names = esc_attr[ implode[ ' ', $depth_classes ] ];

		// Passed classes.
		$classes = empty[ $item->classes ] ? array[] : [array] $item->classes;
		$class_names = esc_attr[ implode[ ' ', apply_filters[ 'nav_menu_css_class', array_filter[ $classes ], $item ] ] ];

		// Build HTML.
		$output .= $indent . '
';

		// Link attributes.
		$attributes  = ! empty[ $item->attr_title ] ? ' title="'  . esc_attr[ $item->attr_title ] .'"' : '';
		$attributes .= ! empty[ $item->target ]     ? ' target="' . esc_attr[ $item->target     ] .'"' : '';
		$attributes .= ! empty[ $item->xfn ]        ? ' rel="'    . esc_attr[ $item->xfn        ] .'"' : '';
		$attributes .= ! empty[ $item->url ]        ? ' href="'   . esc_attr[ $item->url        ] .'"' : '';
		$attributes .= ' class="menu-link ' . [ $depth > 0 ? 'sub-menu-link' : 'main-menu-link' ] . '"';

		// Build HTML output and pass through the proper filter.
		$item_output = sprintf[ '%1$s%3$s%4$s%5$s%6$s',
			$args->before,
			$attributes,
			$args->link_before,
			apply_filters[ 'the_title', $item->title, $item->ID ],
			$args->link_after,
			$args->after
		];
		$output .= apply_filters[ 'walker_nav_menu_start_el', $item_output, $item, $depth, $args ];
	}
}

' . "\n"; } /** * Start the element output. * * Adds main/sub-classes to the list items and links. * * @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 $id Current item ID. */ function start_el[ &$output, $item, $depth = 0, $args = array[], $id = 0 ] { global $wp_query; $indent = [ $depth > 0 ? str_repeat[ "\t", $depth ] : '' ]; // code indent // Depth-dependent classes. $depth_classes = array[ [ $depth == 0 ? 'main-menu-item' : 'sub-menu-item' ], [ $depth >=2 ? 'sub-sub-menu-item' : '' ], [ $depth % 2 ? 'menu-item-odd' : 'menu-item-even' ], 'menu-item-depth-' . $depth ]; $depth_class_names = esc_attr[ implode[ ' ', $depth_classes ] ]; // Passed classes. $classes = empty[ $item->classes ] ? array[] : [array] $item->classes; $class_names = esc_attr[ implode[ ' ', apply_filters[ 'nav_menu_css_class', array_filter[ $classes ], $item ] ] ]; // Build HTML. $output .= $indent . '
• '; // Link attributes. $attributes = ! empty[ $item->attr_title ] ? ' title="' . esc_attr[ $item->attr_title ] .'"' : ''; $attributes .= ! empty[ $item->target ] ? ' target="' . esc_attr[ $item->target ] .'"' : ''; $attributes .= ! empty[ $item->xfn ] ? ' rel="' . esc_attr[ $item->xfn ] .'"' : ''; $attributes .= ! empty[ $item->url ] ? ' href="' . esc_attr[ $item->url ] .'"' : ''; $attributes .= ' class="menu-link ' . [ $depth > 0 ? 'sub-menu-link' : 'main-menu-link' ] . '"'; // Build HTML output and pass through the proper filter. $item_output = sprintf[ '%1$s%3$s%4$s%5$s%6$s', $args->before, $attributes, $args->link_before, apply_filters[ 'the_title', $item->title, $item->ID ], $args->link_after, $args->after ]; $output .= apply_filters[ 'walker_nav_menu_start_el', $item_output, $item, $depth, $args ]; } }3 sau.
  [html]
  %3$s
  [/html]

  Ví dụ

  wp_nav_menu[ array[
  	'menu'   => 'Something custom walker',
  	'walker' => new WPDocs_Walker_Nav_Menu[]
  ] ];
  
  /**
   * Custom walker class.
   */
  class WPDocs_Walker_Nav_Menu extends Walker_Nav_Menu {
  
  	/**
  	 * Starts the list before the elements are added.
  	 *
  	 * Adds classes to the unordered list sub-menus.
  	 *
  	 * @param string $output Passed by reference. Used to append additional content.
  	 * @param int    $depth  Depth of menu item. Used for padding.
  	 * @param array  $args   An array of arguments. @see wp_nav_menu[]
  	 */
  	function start_lvl[ &$output, $depth = 0, $args = array[] ] {
  		// Depth-dependent classes.
  		$indent = [ $depth > 0  ? str_repeat[ "\t", $depth ] : '' ]; // code indent
  		$display_depth = [ $depth + 1]; // because it counts the first submenu as 0
  		$classes = array[
  			'sub-menu',
  			[ $display_depth % 2  ? 'menu-odd' : 'menu-even' ],
  			[ $display_depth >=2 ? 'sub-sub-menu' : '' ],
  			'menu-depth-' . $display_depth
  		];
  		$class_names = implode[ ' ', $classes ];
  
  		// Build HTML for output.
  		$output .= "\n" . $indent . '
  ' . "\n";
  	}
  
  	/**
  	 * Start the element output.
  	 *
  	 * Adds main/sub-classes to the list items and links.
  	 *
  	 * @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    $id     Current item ID.
  	 */
  	function start_el[ &$output, $item, $depth = 0, $args = array[], $id = 0 ] {
  		global $wp_query;
  		$indent = [ $depth > 0 ? str_repeat[ "\t", $depth ] : '' ]; // code indent
  
  		// Depth-dependent classes.
  		$depth_classes = array[
  			[ $depth == 0 ? 'main-menu-item' : 'sub-menu-item' ],
  			[ $depth >=2 ? 'sub-sub-menu-item' : '' ],
  			[ $depth % 2 ? 'menu-item-odd' : 'menu-item-even' ],
  			'menu-item-depth-' . $depth
  		];
  		$depth_class_names = esc_attr[ implode[ ' ', $depth_classes ] ];
  
  		// Passed classes.
  		$classes = empty[ $item->classes ] ? array[] : [array] $item->classes;
  		$class_names = esc_attr[ implode[ ' ', apply_filters[ 'nav_menu_css_class', array_filter[ $classes ], $item ] ] ];
  
  		// Build HTML.
  		$output .= $indent . '
  ';
  
  		// Link attributes.
  		$attributes  = ! empty[ $item->attr_title ] ? ' title="'  . esc_attr[ $item->attr_title ] .'"' : '';
  		$attributes .= ! empty[ $item->target ]     ? ' target="' . esc_attr[ $item->target     ] .'"' : '';
  		$attributes .= ! empty[ $item->xfn ]        ? ' rel="'    . esc_attr[ $item->xfn        ] .'"' : '';
  		$attributes .= ! empty[ $item->url ]        ? ' href="'   . esc_attr[ $item->url        ] .'"' : '';
  		$attributes .= ' class="menu-link ' . [ $depth > 0 ? 'sub-menu-link' : 'main-menu-link' ] . '"';
  
  		// Build HTML output and pass through the proper filter.
  		$item_output = sprintf[ '%1$s%3$s%4$s%5$s%6$s',
  			$args->before,
  			$attributes,
  			$args->link_before,
  			apply_filters[ 'the_title', $item->title, $item->ID ],
  			$args->link_after,
  			$args->after
  		];
  		$output .= apply_filters[ 'walker_nav_menu_start_el', $item_output, $item, $depth, $args ];
  	}
  }

  8
  Đăng nhập để thêm phản hồi
• 0 ? 'sub-menu-link' : 'main-menu-link' ] . '"'; // Build HTML output and pass through the proper filter. $item_output = sprintf[ '%1$s%3$s%4$s%5$s%6$s', $args->before, $attributes, $args->link_before, apply_filters[ 'the_title', $item->title, $item->ID ], $args->link_after, $args->after ]; $output .= apply_filters[ 'walker_nav_menu_start_el', $item_output, $item, $depth, $args ]; } }35]

  Cách đơn giản nhất để xây dựng chức năng walker mới là sao chép và mở rộng lớp mặc định [

  wp_nav_menu[ array[
  	'menu'   => 'Something custom walker',
  	'walker' => new WPDocs_Walker_Nav_Menu[]
  ] ];
  
  /**
   * Custom walker class.
   */
  class WPDocs_Walker_Nav_Menu extends Walker_Nav_Menu {
  
  	/**
  	 * Starts the list before the elements are added.
  	 *
  	 * Adds classes to the unordered list sub-menus.
  	 *
  	 * @param string $output Passed by reference. Used to append additional content.
  	 * @param int    $depth  Depth of menu item. Used for padding.
  	 * @param array  $args   An array of arguments. @see wp_nav_menu[]
  	 */
  	function start_lvl[ &$output, $depth = 0, $args = array[] ] {
  		// Depth-dependent classes.
  		$indent = [ $depth > 0  ? str_repeat[ "\t", $depth ] : '' ]; // code indent
  		$display_depth = [ $depth + 1]; // because it counts the first submenu as 0
  		$classes = array[
  			'sub-menu',
  			[ $display_depth % 2  ? 'menu-odd' : 'menu-even' ],
  			[ $display_depth >=2 ? 'sub-sub-menu' : '' ],
  			'menu-depth-' . $display_depth
  		];
  		$class_names = implode[ ' ', $classes ];
  
  		// Build HTML for output.
  		$output .= "\n" . $indent . '
  ' . "\n";
  	}
  
  	/**
  	 * Start the element output.
  	 *
  	 * Adds main/sub-classes to the list items and links.
  	 *
  	 * @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    $id     Current item ID.
  	 */
  	function start_el[ &$output, $item, $depth = 0, $args = array[], $id = 0 ] {
  		global $wp_query;
  		$indent = [ $depth > 0 ? str_repeat[ "\t", $depth ] : '' ]; // code indent
  
  		// Depth-dependent classes.
  		$depth_classes = array[
  			[ $depth == 0 ? 'main-menu-item' : 'sub-menu-item' ],
  			[ $depth >=2 ? 'sub-sub-menu-item' : '' ],
  			[ $depth % 2 ? 'menu-item-odd' : 'menu-item-even' ],
  			'menu-item-depth-' . $depth
  		];
  		$depth_class_names = esc_attr[ implode[ ' ', $depth_classes ] ];
  
  		// Passed classes.
  		$classes = empty[ $item->classes ] ? array[] : [array] $item->classes;
  		$class_names = esc_attr[ implode[ ' ', apply_filters[ 'nav_menu_css_class', array_filter[ $classes ], $item ] ] ];
  
  		// Build HTML.
  		$output .= $indent . '
  ';
  
  		// Link attributes.
  		$attributes  = ! empty[ $item->attr_title ] ? ' title="'  . esc_attr[ $item->attr_title ] .'"' : '';
  		$attributes .= ! empty[ $item->target ]     ? ' target="' . esc_attr[ $item->target     ] .'"' : '';
  		$attributes .= ! empty[ $item->xfn ]        ? ' rel="'    . esc_attr[ $item->xfn        ] .'"' : '';
  		$attributes .= ! empty[ $item->url ]        ? ' href="'   . esc_attr[ $item->url        ] .'"' : '';
  		$attributes .= ' class="menu-link ' . [ $depth > 0 ? 'sub-menu-link' : 'main-menu-link' ] . '"';
  
  		// Build HTML output and pass through the proper filter.
  		$item_output = sprintf[ '%1$s%3$s%4$s%5$s%6$s',
  			$args->before,
  			$attributes,
  			$args->link_before,
  			apply_filters[ 'the_title', $item->title, $item->ID ],
  			$args->link_after,
  			$args->after
  		];
  		$output .= apply_filters[ 'walker_nav_menu_start_el', $item_output, $item, $depth, $args ];
  	}
  }

  36] từ /wp-includes/nav-menu-template. php và chỉ cần tùy chỉnh những gì bạn cần

  Ví dụ

  Chức năng walker tùy chỉnh này sẽ thêm một số lớp có điều kiện vào menu điều hướng của bạn [i. e. menu phụ, chẵn/lẻ, v.v.]

  wp_nav_menu[ array[
  	'menu'   => 'Something custom walker',
  	'walker' => new WPDocs_Walker_Nav_Menu[]
  ] ];
  
  /**
   * Custom walker class.
   */
  class WPDocs_Walker_Nav_Menu extends Walker_Nav_Menu {
  
  	/**
  	 * Starts the list before the elements are added.
  	 *
  	 * Adds classes to the unordered list sub-menus.
  	 *
  	 * @param string $output Passed by reference. Used to append additional content.
  	 * @param int    $depth  Depth of menu item. Used for padding.
  	 * @param array  $args   An array of arguments. @see wp_nav_menu[]
  	 */
  	function start_lvl[ &$output, $depth = 0, $args = array[] ] {
  		// Depth-dependent classes.
  		$indent = [ $depth > 0  ? str_repeat[ "\t", $depth ] : '' ]; // code indent
  		$display_depth = [ $depth + 1]; // because it counts the first submenu as 0
  		$classes = array[
  			'sub-menu',
  			[ $display_depth % 2  ? 'menu-odd' : 'menu-even' ],
  			[ $display_depth >=2 ? 'sub-sub-menu' : '' ],
  			'menu-depth-' . $display_depth
  		];
  		$class_names = implode[ ' ', $classes ];
  
  		// Build HTML for output.
  		$output .= "\n" . $indent . '
  ' . "\n";
  	}
  
  	/**
  	 * Start the element output.
  	 *
  	 * Adds main/sub-classes to the list items and links.
  	 *
  	 * @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    $id     Current item ID.
  	 */
  	function start_el[ &$output, $item, $depth = 0, $args = array[], $id = 0 ] {
  		global $wp_query;
  		$indent = [ $depth > 0 ? str_repeat[ "\t", $depth ] : '' ]; // code indent
  
  		// Depth-dependent classes.
  		$depth_classes = array[
  			[ $depth == 0 ? 'main-menu-item' : 'sub-menu-item' ],
  			[ $depth >=2 ? 'sub-sub-menu-item' : '' ],
  			[ $depth % 2 ? 'menu-item-odd' : 'menu-item-even' ],
  			'menu-item-depth-' . $depth
  		];
  		$depth_class_names = esc_attr[ implode[ ' ', $depth_classes ] ];
  
  		// Passed classes.
  		$classes = empty[ $item->classes ] ? array[] : [array] $item->classes;
  		$class_names = esc_attr[ implode[ ' ', apply_filters[ 'nav_menu_css_class', array_filter[ $classes ], $item ] ] ];
  
  		// Build HTML.
  		$output .= $indent . '
  ';
  
  		// Link attributes.
  		$attributes  = ! empty[ $item->attr_title ] ? ' title="'  . esc_attr[ $item->attr_title ] .'"' : '';
  		$attributes .= ! empty[ $item->target ]     ? ' target="' . esc_attr[ $item->target     ] .'"' : '';
  		$attributes .= ! empty[ $item->xfn ]        ? ' rel="'    . esc_attr[ $item->xfn        ] .'"' : '';
  		$attributes .= ! empty[ $item->url ]        ? ' href="'   . esc_attr[ $item->url        ] .'"' : '';
  		$attributes .= ' class="menu-link ' . [ $depth > 0 ? 'sub-menu-link' : 'main-menu-link' ] . '"';
  
  		// Build HTML output and pass through the proper filter.
  		$item_output = sprintf[ '%1$s%3$s%4$s%5$s%6$s',
  			$args->before,
  			$attributes,
  			$args->link_before,
  			apply_filters[ 'the_title', $item->title, $item->ID ],
  			$args->link_after,
  			$args->after
  		];
  		$output .= apply_filters[ 'walker_nav_menu_start_el', $item_output, $item, $depth, $args ];
  	}
  }

  Đăng nhập để thêm phản hồi
• 0 ? 'sub-menu-link' : 'main-menu-link' ] . '"'; // Build HTML output and pass through the proper filter. $item_output = sprintf[ '%1$s%3$s%4$s%5$s%6$s', $args->before, $attributes, $args->link_before, apply_filters[ 'the_title', $item->title, $item->ID ], $args->link_after, $args->after ]; $output .= apply_filters[ 'walker_nav_menu_start_el', $item_output, $item, $depth, $args ]; } }87 so với

  wp_nav_menu[ array[
  	'menu'   => 'Something custom walker',
  	'walker' => new WPDocs_Walker_Nav_Menu[]
  ] ];
  
  /**
   * Custom walker class.
   */
  class WPDocs_Walker_Nav_Menu extends Walker_Nav_Menu {
  
  	/**
  	 * Starts the list before the elements are added.
  	 *
  	 * Adds classes to the unordered list sub-menus.
  	 *
  	 * @param string $output Passed by reference. Used to append additional content.
  	 * @param int    $depth  Depth of menu item. Used for padding.
  	 * @param array  $args   An array of arguments. @see wp_nav_menu[]
  	 */
  	function start_lvl[ &$output, $depth = 0, $args = array[] ] {
  		// Depth-dependent classes.
  		$indent = [ $depth > 0  ? str_repeat[ "\t", $depth ] : '' ]; // code indent
  		$display_depth = [ $depth + 1]; // because it counts the first submenu as 0
  		$classes = array[
  			'sub-menu',
  			[ $display_depth % 2  ? 'menu-odd' : 'menu-even' ],
  			[ $display_depth >=2 ? 'sub-sub-menu' : '' ],
  			'menu-depth-' . $display_depth
  		];
  		$class_names = implode[ ' ', $classes ];
  
  		// Build HTML for output.
  		$output .= "\n" . $indent . '
  ' . "\n";
  	}
  
  	/**
  	 * Start the element output.
  	 *
  	 * Adds main/sub-classes to the list items and links.
  	 *
  	 * @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    $id     Current item ID.
  	 */
  	function start_el[ &$output, $item, $depth = 0, $args = array[], $id = 0 ] {
  		global $wp_query;
  		$indent = [ $depth > 0 ? str_repeat[ "\t", $depth ] : '' ]; // code indent
  
  		// Depth-dependent classes.
  		$depth_classes = array[
  			[ $depth == 0 ? 'main-menu-item' : 'sub-menu-item' ],
  			[ $depth >=2 ? 'sub-sub-menu-item' : '' ],
  			[ $depth % 2 ? 'menu-item-odd' : 'menu-item-even' ],
  			'menu-item-depth-' . $depth
  		];
  		$depth_class_names = esc_attr[ implode[ ' ', $depth_classes ] ];
  
  		// Passed classes.
  		$classes = empty[ $item->classes ] ? array[] : [array] $item->classes;
  		$class_names = esc_attr[ implode[ ' ', apply_filters[ 'nav_menu_css_class', array_filter[ $classes ], $item ] ] ];
  
  		// Build HTML.
  		$output .= $indent . '
  ';
  
  		// Link attributes.
  		$attributes  = ! empty[ $item->attr_title ] ? ' title="'  . esc_attr[ $item->attr_title ] .'"' : '';
  		$attributes .= ! empty[ $item->target ]     ? ' target="' . esc_attr[ $item->target     ] .'"' : '';
  		$attributes .= ! empty[ $item->xfn ]        ? ' rel="'    . esc_attr[ $item->xfn        ] .'"' : '';
  		$attributes .= ! empty[ $item->url ]        ? ' href="'   . esc_attr[ $item->url        ] .'"' : '';
  		$attributes .= ' class="menu-link ' . [ $depth > 0 ? 'sub-menu-link' : 'main-menu-link' ] . '"';
  
  		// Build HTML output and pass through the proper filter.
  		$item_output = sprintf[ '%1$s%3$s%4$s%5$s%6$s',
  			$args->before,
  			$attributes,
  			$args->link_before,
  			apply_filters[ 'the_title', $item->title, $item->ID ],
  			$args->link_after,
  			$args->after
  		];
  		$output .= apply_filters[ 'walker_nav_menu_start_el', $item_output, $item, $depth, $args ];
  	}
  }

  85 và

  wp_nav_menu[ array[
  	'menu'   => 'Something custom walker',
  	'walker' => new WPDocs_Walker_Nav_Menu[]
  ] ];
  
  /**
   * Custom walker class.
   */
  class WPDocs_Walker_Nav_Menu extends Walker_Nav_Menu {
  
  	/**
  	 * Starts the list before the elements are added.
  	 *
  	 * Adds classes to the unordered list sub-menus.
  	 *
  	 * @param string $output Passed by reference. Used to append additional content.
  	 * @param int    $depth  Depth of menu item. Used for padding.
  	 * @param array  $args   An array of arguments. @see wp_nav_menu[]
  	 */
  	function start_lvl[ &$output, $depth = 0, $args = array[] ] {
  		// Depth-dependent classes.
  		$indent = [ $depth > 0  ? str_repeat[ "\t", $depth ] : '' ]; // code indent
  		$display_depth = [ $depth + 1]; // because it counts the first submenu as 0
  		$classes = array[
  			'sub-menu',
  			[ $display_depth % 2  ? 'menu-odd' : 'menu-even' ],
  			[ $display_depth >=2 ? 'sub-sub-menu' : '' ],
  			'menu-depth-' . $display_depth
  		];
  		$class_names = implode[ ' ', $classes ];
  
  		// Build HTML for output.
  		$output .= "\n" . $indent . '
  ' . "\n";
  	}
  
  	/**
  	 * Start the element output.
  	 *
  	 * Adds main/sub-classes to the list items and links.
  	 *
  	 * @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    $id     Current item ID.
  	 */
  	function start_el[ &$output, $item, $depth = 0, $args = array[], $id = 0 ] {
  		global $wp_query;
  		$indent = [ $depth > 0 ? str_repeat[ "\t", $depth ] : '' ]; // code indent
  
  		// Depth-dependent classes.
  		$depth_classes = array[
  			[ $depth == 0 ? 'main-menu-item' : 'sub-menu-item' ],
  			[ $depth >=2 ? 'sub-sub-menu-item' : '' ],
  			[ $depth % 2 ? 'menu-item-odd' : 'menu-item-even' ],
  			'menu-item-depth-' . $depth
  		];
  		$depth_class_names = esc_attr[ implode[ ' ', $depth_classes ] ];
  
  		// Passed classes.
  		$classes = empty[ $item->classes ] ? array[] : [array] $item->classes;
  		$class_names = esc_attr[ implode[ ' ', apply_filters[ 'nav_menu_css_class', array_filter[ $classes ], $item ] ] ];
  
  		// Build HTML.
  		$output .= $indent . '
  ';
  
  		// Link attributes.
  		$attributes  = ! empty[ $item->attr_title ] ? ' title="'  . esc_attr[ $item->attr_title ] .'"' : '';
  		$attributes .= ! empty[ $item->target ]     ? ' target="' . esc_attr[ $item->target     ] .'"' : '';
  		$attributes .= ! empty[ $item->xfn ]        ? ' rel="'    . esc_attr[ $item->xfn        ] .'"' : '';
  		$attributes .= ! empty[ $item->url ]        ? ' href="'   . esc_attr[ $item->url        ] .'"' : '';
  		$attributes .= ' class="menu-link ' . [ $depth > 0 ? 'sub-menu-link' : 'main-menu-link' ] . '"';
  
  		// Build HTML output and pass through the proper filter.
  		$item_output = sprintf[ '%1$s%3$s%4$s%5$s%6$s',
  			$args->before,
  			$attributes,
  			$args->link_before,
  			apply_filters[ 'the_title', $item->title, $item->ID ],
  			$args->link_after,
  			$args->after
  		];
  		$output .= apply_filters[ 'walker_nav_menu_start_el', $item_output, $item, $depth, $args ];
  	}
  }

  88 so với

  wp_nav_menu[ array[
  	'menu'   => 'Something custom walker',
  	'walker' => new WPDocs_Walker_Nav_Menu[]
  ] ];
  
  /**
   * Custom walker class.
   */
  class WPDocs_Walker_Nav_Menu extends Walker_Nav_Menu {
  
  	/**
  	 * Starts the list before the elements are added.
  	 *
  	 * Adds classes to the unordered list sub-menus.
  	 *
  	 * @param string $output Passed by reference. Used to append additional content.
  	 * @param int    $depth  Depth of menu item. Used for padding.
  	 * @param array  $args   An array of arguments. @see wp_nav_menu[]
  	 */
  	function start_lvl[ &$output, $depth = 0, $args = array[] ] {
  		// Depth-dependent classes.
  		$indent = [ $depth > 0  ? str_repeat[ "\t", $depth ] : '' ]; // code indent
  		$display_depth = [ $depth + 1]; // because it counts the first submenu as 0
  		$classes = array[
  			'sub-menu',
  			[ $display_depth % 2  ? 'menu-odd' : 'menu-even' ],
  			[ $display_depth >=2 ? 'sub-sub-menu' : '' ],
  			'menu-depth-' . $display_depth
  		];
  		$class_names = implode[ ' ', $classes ];
  
  		// Build HTML for output.
  		$output .= "\n" . $indent . '
  ' . "\n";
  	}
  
  	/**
  	 * Start the element output.
  	 *
  	 * Adds main/sub-classes to the list items and links.
  	 *
  	 * @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    $id     Current item ID.
  	 */
  	function start_el[ &$output, $item, $depth = 0, $args = array[], $id = 0 ] {
  		global $wp_query;
  		$indent = [ $depth > 0 ? str_repeat[ "\t", $depth ] : '' ]; // code indent
  
  		// Depth-dependent classes.
  		$depth_classes = array[
  			[ $depth == 0 ? 'main-menu-item' : 'sub-menu-item' ],
  			[ $depth >=2 ? 'sub-sub-menu-item' : '' ],
  			[ $depth % 2 ? 'menu-item-odd' : 'menu-item-even' ],
  			'menu-item-depth-' . $depth
  		];
  		$depth_class_names = esc_attr[ implode[ ' ', $depth_classes ] ];
  
  		// Passed classes.
  		$classes = empty[ $item->classes ] ? array[] : [array] $item->classes;
  		$class_names = esc_attr[ implode[ ' ', apply_filters[ 'nav_menu_css_class', array_filter[ $classes ], $item ] ] ];
  
  		// Build HTML.
  		$output .= $indent . '
  ';
  
  		// Link attributes.
  		$attributes  = ! empty[ $item->attr_title ] ? ' title="'  . esc_attr[ $item->attr_title ] .'"' : '';
  		$attributes .= ! empty[ $item->target ]     ? ' target="' . esc_attr[ $item->target     ] .'"' : '';
  		$attributes .= ! empty[ $item->xfn ]        ? ' rel="'    . esc_attr[ $item->xfn        ] .'"' : '';
  		$attributes .= ! empty[ $item->url ]        ? ' href="'   . esc_attr[ $item->url        ] .'"' : '';
  		$attributes .= ' class="menu-link ' . [ $depth > 0 ? 'sub-menu-link' : 'main-menu-link' ] . '"';
  
  		// Build HTML output and pass through the proper filter.
  		$item_output = sprintf[ '%1$s%3$s%4$s%5$s%6$s',
  			$args->before,
  			$attributes,
  			$args->link_before,
  			apply_filters[ 'the_title', $item->title, $item->ID ],
  			$args->link_after,
  			$args->after
  		];
  		$output .= apply_filters[ 'walker_nav_menu_start_el', $item_output, $item, $depth, $args ];
  	}
  }

  86

  Các giá trị

  wp_nav_menu[ array[
  	'menu'   => 'Something custom walker',
  	'walker' => new WPDocs_Walker_Nav_Menu[]
  ] ];
  
  /**
   * Custom walker class.
   */
  class WPDocs_Walker_Nav_Menu extends Walker_Nav_Menu {
  
  	/**
  	 * Starts the list before the elements are added.
  	 *
  	 * Adds classes to the unordered list sub-menus.
  	 *
  	 * @param string $output Passed by reference. Used to append additional content.
  	 * @param int    $depth  Depth of menu item. Used for padding.
  	 * @param array  $args   An array of arguments. @see wp_nav_menu[]
  	 */
  	function start_lvl[ &$output, $depth = 0, $args = array[] ] {
  		// Depth-dependent classes.
  		$indent = [ $depth > 0  ? str_repeat[ "\t", $depth ] : '' ]; // code indent
  		$display_depth = [ $depth + 1]; // because it counts the first submenu as 0
  		$classes = array[
  			'sub-menu',
  			[ $display_depth % 2  ? 'menu-odd' : 'menu-even' ],
  			[ $display_depth >=2 ? 'sub-sub-menu' : '' ],
  			'menu-depth-' . $display_depth
  		];
  		$class_names = implode[ ' ', $classes ];
  
  		// Build HTML for output.
  		$output .= "\n" . $indent . '
  ' . "\n";
  	}
  
  	/**
  	 * Start the element output.
  	 *
  	 * Adds main/sub-classes to the list items and links.
  	 *
  	 * @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    $id     Current item ID.
  	 */
  	function start_el[ &$output, $item, $depth = 0, $args = array[], $id = 0 ] {
  		global $wp_query;
  		$indent = [ $depth > 0 ? str_repeat[ "\t", $depth ] : '' ]; // code indent
  
  		// Depth-dependent classes.
  		$depth_classes = array[
  			[ $depth == 0 ? 'main-menu-item' : 'sub-menu-item' ],
  			[ $depth >=2 ? 'sub-sub-menu-item' : '' ],
  			[ $depth % 2 ? 'menu-item-odd' : 'menu-item-even' ],
  			'menu-item-depth-' . $depth
  		];
  		$depth_class_names = esc_attr[ implode[ ' ', $depth_classes ] ];
  
  		// Passed classes.
  		$classes = empty[ $item->classes ] ? array[] : [array] $item->classes;
  		$class_names = esc_attr[ implode[ ' ', apply_filters[ 'nav_menu_css_class', array_filter[ $classes ], $item ] ] ];
  
  		// Build HTML.
  		$output .= $indent . '
  ';
  
  		// Link attributes.
  		$attributes  = ! empty[ $item->attr_title ] ? ' title="'  . esc_attr[ $item->attr_title ] .'"' : '';
  		$attributes .= ! empty[ $item->target ]     ? ' target="' . esc_attr[ $item->target     ] .'"' : '';
  		$attributes .= ! empty[ $item->xfn ]        ? ' rel="'    . esc_attr[ $item->xfn        ] .'"' : '';
  		$attributes .= ! empty[ $item->url ]        ? ' href="'   . esc_attr[ $item->url        ] .'"' : '';
  		$attributes .= ' class="menu-link ' . [ $depth > 0 ? 'sub-menu-link' : 'main-menu-link' ] . '"';
  
  		// Build HTML output and pass through the proper filter.
  		$item_output = sprintf[ '%1$s%3$s%4$s%5$s%6$s',
  			$args->before,
  			$attributes,
  			$args->link_before,
  			apply_filters[ 'the_title', $item->title, $item->ID ],
  			$args->link_after,
  			$args->after
  		];
  		$output .= apply_filters[ 'walker_nav_menu_start_el', $item_output, $item, $depth, $args ];
  	}
  }

  87 /

  wp_nav_menu[ array[
  	'menu'   => 'Something custom walker',
  	'walker' => new WPDocs_Walker_Nav_Menu[]
  ] ];
  
  /**
   * Custom walker class.
   */
  class WPDocs_Walker_Nav_Menu extends Walker_Nav_Menu {
  
  	/**
  	 * Starts the list before the elements are added.
  	 *
  	 * Adds classes to the unordered list sub-menus.
  	 *
  	 * @param string $output Passed by reference. Used to append additional content.
  	 * @param int    $depth  Depth of menu item. Used for padding.
  	 * @param array  $args   An array of arguments. @see wp_nav_menu[]
  	 */
  	function start_lvl[ &$output, $depth = 0, $args = array[] ] {
  		// Depth-dependent classes.
  		$indent = [ $depth > 0  ? str_repeat[ "\t", $depth ] : '' ]; // code indent
  		$display_depth = [ $depth + 1]; // because it counts the first submenu as 0
  		$classes = array[
  			'sub-menu',
  			[ $display_depth % 2  ? 'menu-odd' : 'menu-even' ],
  			[ $display_depth >=2 ? 'sub-sub-menu' : '' ],
  			'menu-depth-' . $display_depth
  		];
  		$class_names = implode[ ' ', $classes ];
  
  		// Build HTML for output.
  		$output .= "\n" . $indent . '
  ' . "\n";
  	}
  
  	/**
  	 * Start the element output.
  	 *
  	 * Adds main/sub-classes to the list items and links.
  	 *
  	 * @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    $id     Current item ID.
  	 */
  	function start_el[ &$output, $item, $depth = 0, $args = array[], $id = 0 ] {
  		global $wp_query;
  		$indent = [ $depth > 0 ? str_repeat[ "\t", $depth ] : '' ]; // code indent
  
  		// Depth-dependent classes.
  		$depth_classes = array[
  			[ $depth == 0 ? 'main-menu-item' : 'sub-menu-item' ],
  			[ $depth >=2 ? 'sub-sub-menu-item' : '' ],
  			[ $depth % 2 ? 'menu-item-odd' : 'menu-item-even' ],
  			'menu-item-depth-' . $depth
  		];
  		$depth_class_names = esc_attr[ implode[ ' ', $depth_classes ] ];
  
  		// Passed classes.
  		$classes = empty[ $item->classes ] ? array[] : [array] $item->classes;
  		$class_names = esc_attr[ implode[ ' ', apply_filters[ 'nav_menu_css_class', array_filter[ $classes ], $item ] ] ];
  
  		// Build HTML.
  		$output .= $indent . '
  ';
  
  		// Link attributes.
  		$attributes  = ! empty[ $item->attr_title ] ? ' title="'  . esc_attr[ $item->attr_title ] .'"' : '';
  		$attributes .= ! empty[ $item->target ]     ? ' target="' . esc_attr[ $item->target     ] .'"' : '';
  		$attributes .= ! empty[ $item->xfn ]        ? ' rel="'    . esc_attr[ $item->xfn        ] .'"' : '';
  		$attributes .= ! empty[ $item->url ]        ? ' href="'   . esc_attr[ $item->url        ] .'"' : '';
  		$attributes .= ' class="menu-link ' . [ $depth > 0 ? 'sub-menu-link' : 'main-menu-link' ] . '"';
  
  		// Build HTML output and pass through the proper filter.
  		$item_output = sprintf[ '%1$s%3$s%4$s%5$s%6$s',
  			$args->before,
  			$attributes,
  			$args->link_before,
  			apply_filters[ 'the_title', $item->title, $item->ID ],
  			$args->link_after,
  			$args->after
  		];
  		$output .= apply_filters[ 'walker_nav_menu_start_el', $item_output, $item, $depth, $args ];
  	}
  }

  88 được xuất BÊN TRONG liên kết.
  Trong khi đó, các giá trị

  wp_nav_menu[ array[
  	'menu'   => 'Something custom walker',
  	'walker' => new WPDocs_Walker_Nav_Menu[]
  ] ];
  
  /**
   * Custom walker class.
   */
  class WPDocs_Walker_Nav_Menu extends Walker_Nav_Menu {
  
  	/**
  	 * Starts the list before the elements are added.
  	 *
  	 * Adds classes to the unordered list sub-menus.
  	 *
  	 * @param string $output Passed by reference. Used to append additional content.
  	 * @param int    $depth  Depth of menu item. Used for padding.
  	 * @param array  $args   An array of arguments. @see wp_nav_menu[]
  	 */
  	function start_lvl[ &$output, $depth = 0, $args = array[] ] {
  		// Depth-dependent classes.
  		$indent = [ $depth > 0  ? str_repeat[ "\t", $depth ] : '' ]; // code indent
  		$display_depth = [ $depth + 1]; // because it counts the first submenu as 0
  		$classes = array[
  			'sub-menu',
  			[ $display_depth % 2  ? 'menu-odd' : 'menu-even' ],
  			[ $display_depth >=2 ? 'sub-sub-menu' : '' ],
  			'menu-depth-' . $display_depth
  		];
  		$class_names = implode[ ' ', $classes ];
  
  		// Build HTML for output.
  		$output .= "\n" . $indent . '
  ' . "\n";
  	}
  
  	/**
  	 * Start the element output.
  	 *
  	 * Adds main/sub-classes to the list items and links.
  	 *
  	 * @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    $id     Current item ID.
  	 */
  	function start_el[ &$output, $item, $depth = 0, $args = array[], $id = 0 ] {
  		global $wp_query;
  		$indent = [ $depth > 0 ? str_repeat[ "\t", $depth ] : '' ]; // code indent
  
  		// Depth-dependent classes.
  		$depth_classes = array[
  			[ $depth == 0 ? 'main-menu-item' : 'sub-menu-item' ],
  			[ $depth >=2 ? 'sub-sub-menu-item' : '' ],
  			[ $depth % 2 ? 'menu-item-odd' : 'menu-item-even' ],
  			'menu-item-depth-' . $depth
  		];
  		$depth_class_names = esc_attr[ implode[ ' ', $depth_classes ] ];
  
  		// Passed classes.
  		$classes = empty[ $item->classes ] ? array[] : [array] $item->classes;
  		$class_names = esc_attr[ implode[ ' ', apply_filters[ 'nav_menu_css_class', array_filter[ $classes ], $item ] ] ];
  
  		// Build HTML.
  		$output .= $indent . '
  ';
  
  		// Link attributes.
  		$attributes  = ! empty[ $item->attr_title ] ? ' title="'  . esc_attr[ $item->attr_title ] .'"' : '';
  		$attributes .= ! empty[ $item->target ]     ? ' target="' . esc_attr[ $item->target     ] .'"' : '';
  		$attributes .= ! empty[ $item->xfn ]        ? ' rel="'    . esc_attr[ $item->xfn        ] .'"' : '';
  		$attributes .= ! empty[ $item->url ]        ? ' href="'   . esc_attr[ $item->url        ] .'"' : '';
  		$attributes .= ' class="menu-link ' . [ $depth > 0 ? 'sub-menu-link' : 'main-menu-link' ] . '"';
  
  		// Build HTML output and pass through the proper filter.
  		$item_output = sprintf[ '%1$s%3$s%4$s%5$s%6$s',
  			$args->before,
  			$attributes,
  			$args->link_before,
  			apply_filters[ 'the_title', $item->title, $item->ID ],
  			$args->link_after,
  			$args->after
  		];
  		$output .= apply_filters[ 'walker_nav_menu_start_el', $item_output, $item, $depth, $args ];
  	}
  }

  85 /

  wp_nav_menu[ array[
  	'menu'   => 'Something custom walker',
  	'walker' => new WPDocs_Walker_Nav_Menu[]
  ] ];
  
  /**
   * Custom walker class.
   */
  class WPDocs_Walker_Nav_Menu extends Walker_Nav_Menu {
  
  	/**
  	 * Starts the list before the elements are added.
  	 *
  	 * Adds classes to the unordered list sub-menus.
  	 *
  	 * @param string $output Passed by reference. Used to append additional content.
  	 * @param int    $depth  Depth of menu item. Used for padding.
  	 * @param array  $args   An array of arguments. @see wp_nav_menu[]
  	 */
  	function start_lvl[ &$output, $depth = 0, $args = array[] ] {
  		// Depth-dependent classes.
  		$indent = [ $depth > 0  ? str_repeat[ "\t", $depth ] : '' ]; // code indent
  		$display_depth = [ $depth + 1]; // because it counts the first submenu as 0
  		$classes = array[
  			'sub-menu',
  			[ $display_depth % 2  ? 'menu-odd' : 'menu-even' ],
  			[ $display_depth >=2 ? 'sub-sub-menu' : '' ],
  			'menu-depth-' . $display_depth
  		];
  		$class_names = implode[ ' ', $classes ];
  
  		// Build HTML for output.
  		$output .= "\n" . $indent . '
  ' . "\n";
  	}
  
  	/**
  	 * Start the element output.
  	 *
  	 * Adds main/sub-classes to the list items and links.
  	 *
  	 * @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    $id     Current item ID.
  	 */
  	function start_el[ &$output, $item, $depth = 0, $args = array[], $id = 0 ] {
  		global $wp_query;
  		$indent = [ $depth > 0 ? str_repeat[ "\t", $depth ] : '' ]; // code indent
  
  		// Depth-dependent classes.
  		$depth_classes = array[
  			[ $depth == 0 ? 'main-menu-item' : 'sub-menu-item' ],
  			[ $depth >=2 ? 'sub-sub-menu-item' : '' ],
  			[ $depth % 2 ? 'menu-item-odd' : 'menu-item-even' ],
  			'menu-item-depth-' . $depth
  		];
  		$depth_class_names = esc_attr[ implode[ ' ', $depth_classes ] ];
  
  		// Passed classes.
  		$classes = empty[ $item->classes ] ? array[] : [array] $item->classes;
  		$class_names = esc_attr[ implode[ ' ', apply_filters[ 'nav_menu_css_class', array_filter[ $classes ], $item ] ] ];
  
  		// Build HTML.
  		$output .= $indent . '
  ';
  
  		// Link attributes.
  		$attributes  = ! empty[ $item->attr_title ] ? ' title="'  . esc_attr[ $item->attr_title ] .'"' : '';
  		$attributes .= ! empty[ $item->target ]     ? ' target="' . esc_attr[ $item->target     ] .'"' : '';
  		$attributes .= ! empty[ $item->xfn ]        ? ' rel="'    . esc_attr[ $item->xfn        ] .'"' : '';
  		$attributes .= ! empty[ $item->url ]        ? ' href="'   . esc_attr[ $item->url        ] .'"' : '';
  		$attributes .= ' class="menu-link ' . [ $depth > 0 ? 'sub-menu-link' : 'main-menu-link' ] . '"';
  
  		// Build HTML output and pass through the proper filter.
  		$item_output = sprintf[ '%1$s%3$s%4$s%5$s%6$s',
  			$args->before,
  			$attributes,
  			$args->link_before,
  			apply_filters[ 'the_title', $item->title, $item->ID ],
  			$args->link_after,
  			$args->after
  		];
  		$output .= apply_filters[ 'walker_nav_menu_start_el', $item_output, $item, $depth, $args ];
  	}
  }

  86 được xuất BÊN NGOÀI liên kết, nhưng nằm trong mục danh sách.

  Ví dụ.
  ______3705

  Đăng nhập để thêm phản hồi
• 0 ? 'sub-menu-link' : 'main-menu-link' ] . '"'; // Build HTML output and pass through the proper filter. $item_output = sprintf[ '%1$s%3$s%4$s%5$s%6$s', $args->before, $attributes, $args->link_before, apply_filters[ 'the_title', $item->title, $item->ID ], $args->link_after, $args->after ]; $output .= apply_filters[ 'walker_nav_menu_start_el', $item_output, $item, $depth, $args ]; } }706

  [html]
  php wp_nav_menu[];
  [/html]

  Đăng nhập để thêm phản hồi
• 0 ? 'sub-menu-link' : 'main-menu-link' ] . '"'; // Build HTML output and pass through the proper filter. $item_output = sprintf[ '%1$s%3$s%4$s%5$s%6$s', $args->before, $attributes, $args->link_before, apply_filters[ 'the_title', $item->title, $item->ID ], $args->link_after, $args->after ]; $output .= apply_filters[ 'walker_nav_menu_start_el', $item_output, $item, $depth, $args ]; } }706

  Trong trường hợp không tìm thấy menu phù hợp với menu, có vẻ như chuyển một

  wp_nav_menu[ array[
  	'menu'   => 'Something custom walker',
  	'walker' => new WPDocs_Walker_Nav_Menu[]
  ] ];
  
  /**
   * Custom walker class.
   */
  class WPDocs_Walker_Nav_Menu extends Walker_Nav_Menu {
  
  	/**
  	 * Starts the list before the elements are added.
  	 *
  	 * Adds classes to the unordered list sub-menus.
  	 *
  	 * @param string $output Passed by reference. Used to append additional content.
  	 * @param int    $depth  Depth of menu item. Used for padding.
  	 * @param array  $args   An array of arguments. @see wp_nav_menu[]
  	 */
  	function start_lvl[ &$output, $depth = 0, $args = array[] ] {
  		// Depth-dependent classes.
  		$indent = [ $depth > 0  ? str_repeat[ "\t", $depth ] : '' ]; // code indent
  		$display_depth = [ $depth + 1]; // because it counts the first submenu as 0
  		$classes = array[
  			'sub-menu',
  			[ $display_depth % 2  ? 'menu-odd' : 'menu-even' ],
  			[ $display_depth >=2 ? 'sub-sub-menu' : '' ],
  			'menu-depth-' . $display_depth
  		];
  		$class_names = implode[ ' ', $classes ];
  
  		// Build HTML for output.
  		$output .= "\n" . $indent . '
  ' . "\n";
  	}
  
  	/**
  	 * Start the element output.
  	 *
  	 * Adds main/sub-classes to the list items and links.
  	 *
  	 * @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    $id     Current item ID.
  	 */
  	function start_el[ &$output, $item, $depth = 0, $args = array[], $id = 0 ] {
  		global $wp_query;
  		$indent = [ $depth > 0 ? str_repeat[ "\t", $depth ] : '' ]; // code indent
  
  		// Depth-dependent classes.
  		$depth_classes = array[
  			[ $depth == 0 ? 'main-menu-item' : 'sub-menu-item' ],
  			[ $depth >=2 ? 'sub-sub-menu-item' : '' ],
  			[ $depth % 2 ? 'menu-item-odd' : 'menu-item-even' ],
  			'menu-item-depth-' . $depth
  		];
  		$depth_class_names = esc_attr[ implode[ ' ', $depth_classes ] ];
  
  		// Passed classes.
  		$classes = empty[ $item->classes ] ? array[] : [array] $item->classes;
  		$class_names = esc_attr[ implode[ ' ', apply_filters[ 'nav_menu_css_class', array_filter[ $classes ], $item ] ] ];
  
  		// Build HTML.
  		$output .= $indent . '
  ';
  
  		// Link attributes.
  		$attributes  = ! empty[ $item->attr_title ] ? ' title="'  . esc_attr[ $item->attr_title ] .'"' : '';
  		$attributes .= ! empty[ $item->target ]     ? ' target="' . esc_attr[ $item->target     ] .'"' : '';
  		$attributes .= ! empty[ $item->xfn ]        ? ' rel="'    . esc_attr[ $item->xfn        ] .'"' : '';
  		$attributes .= ! empty[ $item->url ]        ? ' href="'   . esc_attr[ $item->url        ] .'"' : '';
  		$attributes .= ' class="menu-link ' . [ $depth > 0 ? 'sub-menu-link' : 'main-menu-link' ] . '"';
  
  		// Build HTML output and pass through the proper filter.
  		$item_output = sprintf[ '%1$s%3$s%4$s%5$s%6$s',
  			$args->before,
  			$attributes,
  			$args->link_before,
  			apply_filters[ 'the_title', $item->title, $item->ID ],
  			$args->link_after,
  			$args->after
  		];
  		$output .= apply_filters[ 'walker_nav_menu_start_el', $item_output, $item, $depth, $args ];
  	}
  }

  2 không có thật là cách duy nhất để ngăn việc quay trở lại menu không trống đầu tiên

  'thumbs' => [
      'srcsets' => [
         'teaser' => [
         '800w' => ['width' => 800, 'quality' => 100],
      '1024w' => ['width' => 1024, 'quality' => 100],
      '1440w' => ['width' => 1440, 'quality' => 100],
      '2048w' => ['width' => 2048, 'quality' => 100]
        ]
      ]
    ]
  

  1
  Đăng nhập để thêm phản hồi
• 0 ? 'sub-menu-link' : 'main-menu-link' ] . '"'; // Build HTML output and pass through the proper filter. $item_output = sprintf[ '%1$s%3$s%4$s%5$s%6$s', $args->before, $attributes, $args->link_before, apply_filters[ 'the_title', $item->title, $item->ID ], $args->link_after, $args->after ]; $output .= apply_filters[ 'walker_nav_menu_start_el', $item_output, $item, $depth, $args ]; } }0
  Đăng nhập để thêm phản hồi
• 0 ? 'sub-menu-link' : 'main-menu-link' ] . '"'; // Build HTML output and pass through the proper filter. $item_output = sprintf[ '%1$s%3$s%4$s%5$s%6$s', $args->before, $attributes, $args->link_before, apply_filters[ 'the_title', $item->title, $item->ID ], $args->link_after, $args->after ]; $output .= apply_filters[ 'walker_nav_menu_start_el', $item_output, $item, $depth, $args ]; } }0
  Đăng nhập để thêm phản hồi
• 0 ? 'sub-menu-link' : 'main-menu-link' ] . '"'; // Build HTML output and pass through the proper filter. $item_output = sprintf[ '%1$s%3$s%4$s%5$s%6$s', $args->before, $attributes, $args->link_before, apply_filters[ 'the_title', $item->title, $item->ID ], $args->link_after, $args->after ]; $output .= apply_filters[ 'walker_nav_menu_start_el', $item_output, $item, $depth, $args ]; } }3

  Ví dụ sử dụng

  wp_nav_menu[ array[
  	'menu'   => 'Something custom walker',
  	'walker' => new WPDocs_Walker_Nav_Menu[]
  ] ];
  
  /**
   * Custom walker class.
   */
  class WPDocs_Walker_Nav_Menu extends Walker_Nav_Menu {
  
  	/**
  	 * Starts the list before the elements are added.
  	 *
  	 * Adds classes to the unordered list sub-menus.
  	 *
  	 * @param string $output Passed by reference. Used to append additional content.
  	 * @param int    $depth  Depth of menu item. Used for padding.
  	 * @param array  $args   An array of arguments. @see wp_nav_menu[]
  	 */
  	function start_lvl[ &$output, $depth = 0, $args = array[] ] {
  		// Depth-dependent classes.
  		$indent = [ $depth > 0  ? str_repeat[ "\t", $depth ] : '' ]; // code indent
  		$display_depth = [ $depth + 1]; // because it counts the first submenu as 0
  		$classes = array[
  			'sub-menu',
  			[ $display_depth % 2  ? 'menu-odd' : 'menu-even' ],
  			[ $display_depth >=2 ? 'sub-sub-menu' : '' ],
  			'menu-depth-' . $display_depth
  		];
  		$class_names = implode[ ' ', $classes ];
  
  		// Build HTML for output.
  		$output .= "\n" . $indent . '
  ' . "\n";
  	}
  
  	/**
  	 * Start the element output.
  	 *
  	 * Adds main/sub-classes to the list items and links.
  	 *
  	 * @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    $id     Current item ID.
  	 */
  	function start_el[ &$output, $item, $depth = 0, $args = array[], $id = 0 ] {
  		global $wp_query;
  		$indent = [ $depth > 0 ? str_repeat[ "\t", $depth ] : '' ]; // code indent
  
  		// Depth-dependent classes.
  		$depth_classes = array[
  			[ $depth == 0 ? 'main-menu-item' : 'sub-menu-item' ],
  			[ $depth >=2 ? 'sub-sub-menu-item' : '' ],
  			[ $depth % 2 ? 'menu-item-odd' : 'menu-item-even' ],
  			'menu-item-depth-' . $depth
  		];
  		$depth_class_names = esc_attr[ implode[ ' ', $depth_classes ] ];
  
  		// Passed classes.
  		$classes = empty[ $item->classes ] ? array[] : [array] $item->classes;
  		$class_names = esc_attr[ implode[ ' ', apply_filters[ 'nav_menu_css_class', array_filter[ $classes ], $item ] ] ];
  
  		// Build HTML.
  		$output .= $indent . '
  ';
  
  		// Link attributes.
  		$attributes  = ! empty[ $item->attr_title ] ? ' title="'  . esc_attr[ $item->attr_title ] .'"' : '';
  		$attributes .= ! empty[ $item->target ]     ? ' target="' . esc_attr[ $item->target     ] .'"' : '';
  		$attributes .= ! empty[ $item->xfn ]        ? ' rel="'    . esc_attr[ $item->xfn        ] .'"' : '';
  		$attributes .= ! empty[ $item->url ]        ? ' href="'   . esc_attr[ $item->url        ] .'"' : '';
  		$attributes .= ' class="menu-link ' . [ $depth > 0 ? 'sub-menu-link' : 'main-menu-link' ] . '"';
  
  		// Build HTML output and pass through the proper filter.
  		$item_output = sprintf[ '%1$s%3$s%4$s%5$s%6$s',
  			$args->before,
  			$attributes,
  			$args->link_before,
  			apply_filters[ 'the_title', $item->title, $item->ID ],
  			$args->link_after,
  			$args->after
  		];
  		$output .= apply_filters[ 'walker_nav_menu_start_el', $item_output, $item, $depth, $args ];
  	}
  }

  709
  Đăng nhập để thêm phản hồi
• 0 ? 'sub-menu-link' : 'main-menu-link' ] . '"'; // Build HTML output and pass through the proper filter. $item_output = sprintf[ '%1$s%3$s%4$s%5$s%6$s', $args->before, $attributes, $args->link_before, apply_filters[ 'the_title', $item->title, $item->ID ], $args->link_after, $args->after ]; $output .= apply_filters[ 'walker_nav_menu_start_el', $item_output, $item, $depth, $args ]; } }710 vào mục menu đang hoạt động

  Đây là mã

  wp_nav_menu[ array[
  	'menu'   => 'Something custom walker',
  	'walker' => new WPDocs_Walker_Nav_Menu[]
  ] ];
  
  /**
   * Custom walker class.
   */
  class WPDocs_Walker_Nav_Menu extends Walker_Nav_Menu {
  
  	/**
  	 * Starts the list before the elements are added.
  	 *
  	 * Adds classes to the unordered list sub-menus.
  	 *
  	 * @param string $output Passed by reference. Used to append additional content.
  	 * @param int    $depth  Depth of menu item. Used for padding.
  	 * @param array  $args   An array of arguments. @see wp_nav_menu[]
  	 */
  	function start_lvl[ &$output, $depth = 0, $args = array[] ] {
  		// Depth-dependent classes.
  		$indent = [ $depth > 0  ? str_repeat[ "\t", $depth ] : '' ]; // code indent
  		$display_depth = [ $depth + 1]; // because it counts the first submenu as 0
  		$classes = array[
  			'sub-menu',
  			[ $display_depth % 2  ? 'menu-odd' : 'menu-even' ],
  			[ $display_depth >=2 ? 'sub-sub-menu' : '' ],
  			'menu-depth-' . $display_depth
  		];
  		$class_names = implode[ ' ', $classes ];
  
  		// Build HTML for output.
  		$output .= "\n" . $indent . '
  ' . "\n";
  	}
  
  	/**
  	 * Start the element output.
  	 *
  	 * Adds main/sub-classes to the list items and links.
  	 *
  	 * @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    $id     Current item ID.
  	 */
  	function start_el[ &$output, $item, $depth = 0, $args = array[], $id = 0 ] {
  		global $wp_query;
  		$indent = [ $depth > 0 ? str_repeat[ "\t", $depth ] : '' ]; // code indent
  
  		// Depth-dependent classes.
  		$depth_classes = array[
  			[ $depth == 0 ? 'main-menu-item' : 'sub-menu-item' ],
  			[ $depth >=2 ? 'sub-sub-menu-item' : '' ],
  			[ $depth % 2 ? 'menu-item-odd' : 'menu-item-even' ],
  			'menu-item-depth-' . $depth
  		];
  		$depth_class_names = esc_attr[ implode[ ' ', $depth_classes ] ];
  
  		// Passed classes.
  		$classes = empty[ $item->classes ] ? array[] : [array] $item->classes;
  		$class_names = esc_attr[ implode[ ' ', apply_filters[ 'nav_menu_css_class', array_filter[ $classes ], $item ] ] ];
  
  		// Build HTML.
  		$output .= $indent . '
  ';
  
  		// Link attributes.
  		$attributes  = ! empty[ $item->attr_title ] ? ' title="'  . esc_attr[ $item->attr_title ] .'"' : '';
  		$attributes .= ! empty[ $item->target ]     ? ' target="' . esc_attr[ $item->target     ] .'"' : '';
  		$attributes .= ! empty[ $item->xfn ]        ? ' rel="'    . esc_attr[ $item->xfn        ] .'"' : '';
  		$attributes .= ! empty[ $item->url ]        ? ' href="'   . esc_attr[ $item->url        ] .'"' : '';
  		$attributes .= ' class="menu-link ' . [ $depth > 0 ? 'sub-menu-link' : 'main-menu-link' ] . '"';
  
  		// Build HTML output and pass through the proper filter.
  		$item_output = sprintf[ '%1$s%3$s%4$s%5$s%6$s',
  			$args->before,
  			$attributes,
  			$args->link_before,
  			apply_filters[ 'the_title', $item->title, $item->ID ],
  			$args->link_after,
  			$args->after
  		];
  		$output .= apply_filters[ 'walker_nav_menu_start_el', $item_output, $item, $depth, $args ];
  	}
  }

  70
  Đăng nhập để thêm phản hồi
• 0 ? 'sub-menu-link' : 'main-menu-link' ] . '"'; // Build HTML output and pass through the proper filter. $item_output = sprintf[ '%1$s%3$s%4$s%5$s%6$s', $args->before, $attributes, $args->link_before, apply_filters[ 'the_title', $item->title, $item->ID ], $args->link_after, $args->after ]; $output .= apply_filters[ 'walker_nav_menu_start_el', $item_output, $item, $depth, $args ]; } }711. Các tùy chọn trên trang này hiển thị tham số này dưới dạng chuỗi để thay đổi phần tử được sử dụng để chứa menu

  Tuy nhiên, ở đây không lưu ý rằng nếu bạn chuyển

  wp_nav_menu[ array[
  	'menu'   => 'Something custom walker',
  	'walker' => new WPDocs_Walker_Nav_Menu[]
  ] ];
  
  /**
   * Custom walker class.
   */
  class WPDocs_Walker_Nav_Menu extends Walker_Nav_Menu {
  
  	/**
  	 * Starts the list before the elements are added.
  	 *
  	 * Adds classes to the unordered list sub-menus.
  	 *
  	 * @param string $output Passed by reference. Used to append additional content.
  	 * @param int    $depth  Depth of menu item. Used for padding.
  	 * @param array  $args   An array of arguments. @see wp_nav_menu[]
  	 */
  	function start_lvl[ &$output, $depth = 0, $args = array[] ] {
  		// Depth-dependent classes.
  		$indent = [ $depth > 0  ? str_repeat[ "\t", $depth ] : '' ]; // code indent
  		$display_depth = [ $depth + 1]; // because it counts the first submenu as 0
  		$classes = array[
  			'sub-menu',
  			[ $display_depth % 2  ? 'menu-odd' : 'menu-even' ],
  			[ $display_depth >=2 ? 'sub-sub-menu' : '' ],
  			'menu-depth-' . $display_depth
  		];
  		$class_names = implode[ ' ', $classes ];
  
  		// Build HTML for output.
  		$output .= "\n" . $indent . '
  ' . "\n";
  	}
  
  	/**
  	 * Start the element output.
  	 *
  	 * Adds main/sub-classes to the list items and links.
  	 *
  	 * @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    $id     Current item ID.
  	 */
  	function start_el[ &$output, $item, $depth = 0, $args = array[], $id = 0 ] {
  		global $wp_query;
  		$indent = [ $depth > 0 ? str_repeat[ "\t", $depth ] : '' ]; // code indent
  
  		// Depth-dependent classes.
  		$depth_classes = array[
  			[ $depth == 0 ? 'main-menu-item' : 'sub-menu-item' ],
  			[ $depth >=2 ? 'sub-sub-menu-item' : '' ],
  			[ $depth % 2 ? 'menu-item-odd' : 'menu-item-even' ],
  			'menu-item-depth-' . $depth
  		];
  		$depth_class_names = esc_attr[ implode[ ' ', $depth_classes ] ];
  
  		// Passed classes.
  		$classes = empty[ $item->classes ] ? array[] : [array] $item->classes;
  		$class_names = esc_attr[ implode[ ' ', apply_filters[ 'nav_menu_css_class', array_filter[ $classes ], $item ] ] ];
  
  		// Build HTML.
  		$output .= $indent . '
  ';
  
  		// Link attributes.
  		$attributes  = ! empty[ $item->attr_title ] ? ' title="'  . esc_attr[ $item->attr_title ] .'"' : '';
  		$attributes .= ! empty[ $item->target ]     ? ' target="' . esc_attr[ $item->target     ] .'"' : '';
  		$attributes .= ! empty[ $item->xfn ]        ? ' rel="'    . esc_attr[ $item->xfn        ] .'"' : '';
  		$attributes .= ! empty[ $item->url ]        ? ' href="'   . esc_attr[ $item->url        ] .'"' : '';
  		$attributes .= ' class="menu-link ' . [ $depth > 0 ? 'sub-menu-link' : 'main-menu-link' ] . '"';
  
  		// Build HTML output and pass through the proper filter.
  		$item_output = sprintf[ '%1$s%3$s%4$s%5$s%6$s',
  			$args->before,
  			$attributes,
  			$args->link_before,
  			apply_filters[ 'the_title', $item->title, $item->ID ],
  			$args->link_after,
  			$args->after
  		];
  		$output .= apply_filters[ 'walker_nav_menu_start_el', $item_output, $item, $depth, $args ];
  	}
  }

  712 làm giá trị, vùng chứa sẽ bị xóa hoàn toàn, chỉ để lại phần tử menu

  wp_nav_menu[ array[
  	'menu'   => 'Something custom walker',
  	'walker' => new WPDocs_Walker_Nav_Menu[]
  ] ];
  
  /**
   * Custom walker class.
   */
  class WPDocs_Walker_Nav_Menu extends Walker_Nav_Menu {
  
  	/**
  	 * Starts the list before the elements are added.
  	 *
  	 * Adds classes to the unordered list sub-menus.
  	 *
  	 * @param string $output Passed by reference. Used to append additional content.
  	 * @param int    $depth  Depth of menu item. Used for padding.
  	 * @param array  $args   An array of arguments. @see wp_nav_menu[]
  	 */
  	function start_lvl[ &$output, $depth = 0, $args = array[] ] {
  		// Depth-dependent classes.
  		$indent = [ $depth > 0  ? str_repeat[ "\t", $depth ] : '' ]; // code indent
  		$display_depth = [ $depth + 1]; // because it counts the first submenu as 0
  		$classes = array[
  			'sub-menu',
  			[ $display_depth % 2  ? 'menu-odd' : 'menu-even' ],
  			[ $display_depth >=2 ? 'sub-sub-menu' : '' ],
  			'menu-depth-' . $display_depth
  		];
  		$class_names = implode[ ' ', $classes ];
  
  		// Build HTML for output.
  		$output .= "\n" . $indent . '
  ' . "\n";
  	}
  
  	/**
  	 * Start the element output.
  	 *
  	 * Adds main/sub-classes to the list items and links.
  	 *
  	 * @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    $id     Current item ID.
  	 */
  	function start_el[ &$output, $item, $depth = 0, $args = array[], $id = 0 ] {
  		global $wp_query;
  		$indent = [ $depth > 0 ? str_repeat[ "\t", $depth ] : '' ]; // code indent
  
  		// Depth-dependent classes.
  		$depth_classes = array[
  			[ $depth == 0 ? 'main-menu-item' : 'sub-menu-item' ],
  			[ $depth >=2 ? 'sub-sub-menu-item' : '' ],
  			[ $depth % 2 ? 'menu-item-odd' : 'menu-item-even' ],
  			'menu-item-depth-' . $depth
  		];
  		$depth_class_names = esc_attr[ implode[ ' ', $depth_classes ] ];
  
  		// Passed classes.
  		$classes = empty[ $item->classes ] ? array[] : [array] $item->classes;
  		$class_names = esc_attr[ implode[ ' ', apply_filters[ 'nav_menu_css_class', array_filter[ $classes ], $item ] ] ];
  
  		// Build HTML.
  		$output .= $indent . '
  ';
  
  		// Link attributes.
  		$attributes  = ! empty[ $item->attr_title ] ? ' title="'  . esc_attr[ $item->attr_title ] .'"' : '';
  		$attributes .= ! empty[ $item->target ]     ? ' target="' . esc_attr[ $item->target     ] .'"' : '';
  		$attributes .= ! empty[ $item->xfn ]        ? ' rel="'    . esc_attr[ $item->xfn        ] .'"' : '';
  		$attributes .= ! empty[ $item->url ]        ? ' href="'   . esc_attr[ $item->url        ] .'"' : '';
  		$attributes .= ' class="menu-link ' . [ $depth > 0 ? 'sub-menu-link' : 'main-menu-link' ] . '"';
  
  		// Build HTML output and pass through the proper filter.
  		$item_output = sprintf[ '%1$s%3$s%4$s%5$s%6$s',
  			$args->before,
  			$attributes,
  			$args->link_before,
  			apply_filters[ 'the_title', $item->title, $item->ID ],
  			$args->link_after,
  			$args->after
  		];
  		$output .= apply_filters[ 'walker_nav_menu_start_el', $item_output, $item, $depth, $args ];
  	}
  }

  09

  wp_nav_menu[ array[
  	'menu'   => 'Something custom walker',
  	'walker' => new WPDocs_Walker_Nav_Menu[]
  ] ];
  
  /**
   * Custom walker class.
   */
  class WPDocs_Walker_Nav_Menu extends Walker_Nav_Menu {
  
  	/**
  	 * Starts the list before the elements are added.
  	 *
  	 * Adds classes to the unordered list sub-menus.
  	 *
  	 * @param string $output Passed by reference. Used to append additional content.
  	 * @param int    $depth  Depth of menu item. Used for padding.
  	 * @param array  $args   An array of arguments. @see wp_nav_menu[]
  	 */
  	function start_lvl[ &$output, $depth = 0, $args = array[] ] {
  		// Depth-dependent classes.
  		$indent = [ $depth > 0  ? str_repeat[ "\t", $depth ] : '' ]; // code indent
  		$display_depth = [ $depth + 1]; // because it counts the first submenu as 0
  		$classes = array[
  			'sub-menu',
  			[ $display_depth % 2  ? 'menu-odd' : 'menu-even' ],
  			[ $display_depth >=2 ? 'sub-sub-menu' : '' ],
  			'menu-depth-' . $display_depth
  		];
  		$class_names = implode[ ' ', $classes ];
  
  		// Build HTML for output.
  		$output .= "\n" . $indent . '
  ' . "\n";
  	}
  
  	/**
  	 * Start the element output.
  	 *
  	 * Adds main/sub-classes to the list items and links.
  	 *
  	 * @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    $id     Current item ID.
  	 */
  	function start_el[ &$output, $item, $depth = 0, $args = array[], $id = 0 ] {
  		global $wp_query;
  		$indent = [ $depth > 0 ? str_repeat[ "\t", $depth ] : '' ]; // code indent
  
  		// Depth-dependent classes.
  		$depth_classes = array[
  			[ $depth == 0 ? 'main-menu-item' : 'sub-menu-item' ],
  			[ $depth >=2 ? 'sub-sub-menu-item' : '' ],
  			[ $depth % 2 ? 'menu-item-odd' : 'menu-item-even' ],
  			'menu-item-depth-' . $depth
  		];
  		$depth_class_names = esc_attr[ implode[ ' ', $depth_classes ] ];
  
  		// Passed classes.
  		$classes = empty[ $item->classes ] ? array[] : [array] $item->classes;
  		$class_names = esc_attr[ implode[ ' ', apply_filters[ 'nav_menu_css_class', array_filter[ $classes ], $item ] ] ];
  
  		// Build HTML.
  		$output .= $indent . '
  ';
  
  		// Link attributes.
  		$attributes  = ! empty[ $item->attr_title ] ? ' title="'  . esc_attr[ $item->attr_title ] .'"' : '';
  		$attributes .= ! empty[ $item->target ]     ? ' target="' . esc_attr[ $item->target     ] .'"' : '';
  		$attributes .= ! empty[ $item->xfn ]        ? ' rel="'    . esc_attr[ $item->xfn        ] .'"' : '';
  		$attributes .= ! empty[ $item->url ]        ? ' href="'   . esc_attr[ $item->url        ] .'"' : '';
  		$attributes .= ' class="menu-link ' . [ $depth > 0 ? 'sub-menu-link' : 'main-menu-link' ] . '"';
  
  		// Build HTML output and pass through the proper filter.
  		$item_output = sprintf[ '%1$s%3$s%4$s%5$s%6$s',
  			$args->before,
  			$attributes,
  			$args->link_before,
  			apply_filters[ 'the_title', $item->title, $item->ID ],
  			$args->link_after,
  			$args->after
  		];
  		$output .= apply_filters[ 'walker_nav_menu_start_el', $item_output, $item, $depth, $args ];
  	}
  }

  71
  Đăng nhập để thêm phản hồi
• 0 ? 'sub-menu-link' : 'main-menu-link' ] . '"'; // Build HTML output and pass through the proper filter. $item_output = sprintf[ '%1$s%3$s%4$s%5$s%6$s', $args->before, $attributes, $args->link_before, apply_filters[ 'the_title', $item->title, $item->ID ], $args->link_after, $args->after ]; $output .= apply_filters[ 'walker_nav_menu_start_el', $item_output, $item, $depth, $args ]; } }72
  Đăng nhập để thêm phản hồi
• 0 ? 'sub-menu-link' : 'main-menu-link' ] . '"'; // Build HTML output and pass through the proper filter. $item_output = sprintf[ '%1$s%3$s%4$s%5$s%6$s', $args->before, $attributes, $args->link_before, apply_filters[ 'the_title', $item->title, $item->ID ], $args->link_after, $args->after ]; $output .= apply_filters[ 'walker_nav_menu_start_el', $item_output, $item, $depth, $args ]; } }73
  Đăng nhập để thêm phản hồi
• 0 ? 'sub-menu-link' : 'main-menu-link' ] . '"'; // Build HTML output and pass through the proper filter. $item_output = sprintf[ '%1$s%3$s%4$s%5$s%6$s', $args->before, $attributes, $args->link_before, apply_filters[ 'the_title', $item->title, $item->ID ], $args->link_after, $args->after ]; $output .= apply_filters[ 'walker_nav_menu_start_el', $item_output, $item, $depth, $args ]; } }74
  Đăng nhập để thêm phản hồi
• 0 ? 'sub-menu-link' : 'main-menu-link' ] . '"'; // Build HTML output and pass through the proper filter. $item_output = sprintf[ '%1$s%3$s%4$s%5$s%6$s', $args->before, $attributes, $args->link_before, apply_filters[ 'the_title', $item->title, $item->ID ], $args->link_after, $args->after ]; $output .= apply_filters[ 'walker_nav_menu_start_el', $item_output, $item, $depth, $args ]; } }711 mặc định chứa menu, chỉ cần
  1. Sử dụng tham số ‘container’ trong mảng
  2. Và để trống

  Giống như trong ví dụ sau

  wp_nav_menu[ array[
  	'menu'   => 'Something custom walker',
  	'walker' => new WPDocs_Walker_Nav_Menu[]
  ] ];
  
  /**
   * Custom walker class.
   */
  class WPDocs_Walker_Nav_Menu extends Walker_Nav_Menu {
  
  	/**
  	 * Starts the list before the elements are added.
  	 *
  	 * Adds classes to the unordered list sub-menus.
  	 *
  	 * @param string $output Passed by reference. Used to append additional content.
  	 * @param int    $depth  Depth of menu item. Used for padding.
  	 * @param array  $args   An array of arguments. @see wp_nav_menu[]
  	 */
  	function start_lvl[ &$output, $depth = 0, $args = array[] ] {
  		// Depth-dependent classes.
  		$indent = [ $depth > 0  ? str_repeat[ "\t", $depth ] : '' ]; // code indent
  		$display_depth = [ $depth + 1]; // because it counts the first submenu as 0
  		$classes = array[
  			'sub-menu',
  			[ $display_depth % 2  ? 'menu-odd' : 'menu-even' ],
  			[ $display_depth >=2 ? 'sub-sub-menu' : '' ],
  			'menu-depth-' . $display_depth
  		];
  		$class_names = implode[ ' ', $classes ];
  
  		// Build HTML for output.
  		$output .= "\n" . $indent . '
  ' . "\n";
  	}
  
  	/**
  	 * Start the element output.
  	 *
  	 * Adds main/sub-classes to the list items and links.
  	 *
  	 * @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    $id     Current item ID.
  	 */
  	function start_el[ &$output, $item, $depth = 0, $args = array[], $id = 0 ] {
  		global $wp_query;
  		$indent = [ $depth > 0 ? str_repeat[ "\t", $depth ] : '' ]; // code indent
  
  		// Depth-dependent classes.
  		$depth_classes = array[
  			[ $depth == 0 ? 'main-menu-item' : 'sub-menu-item' ],
  			[ $depth >=2 ? 'sub-sub-menu-item' : '' ],
  			[ $depth % 2 ? 'menu-item-odd' : 'menu-item-even' ],
  			'menu-item-depth-' . $depth
  		];
  		$depth_class_names = esc_attr[ implode[ ' ', $depth_classes ] ];
  
  		// Passed classes.
  		$classes = empty[ $item->classes ] ? array[] : [array] $item->classes;
  		$class_names = esc_attr[ implode[ ' ', apply_filters[ 'nav_menu_css_class', array_filter[ $classes ], $item ] ] ];
  
  		// Build HTML.
  		$output .= $indent . '
  ';
  
  		// Link attributes.
  		$attributes  = ! empty[ $item->attr_title ] ? ' title="'  . esc_attr[ $item->attr_title ] .'"' : '';
  		$attributes .= ! empty[ $item->target ]     ? ' target="' . esc_attr[ $item->target     ] .'"' : '';
  		$attributes .= ! empty[ $item->xfn ]        ? ' rel="'    . esc_attr[ $item->xfn        ] .'"' : '';
  		$attributes .= ! empty[ $item->url ]        ? ' href="'   . esc_attr[ $item->url        ] .'"' : '';
  		$attributes .= ' class="menu-link ' . [ $depth > 0 ? 'sub-menu-link' : 'main-menu-link' ] . '"';
  
  		// Build HTML output and pass through the proper filter.
  		$item_output = sprintf[ '%1$s%3$s%4$s%5$s%6$s',
  			$args->before,
  			$attributes,
  			$args->link_before,
  			apply_filters[ 'the_title', $item->title, $item->ID ],
  			$args->link_after,
  			$args->after
  		];
  		$output .= apply_filters[ 'walker_nav_menu_start_el', $item_output, $item, $depth, $args ];
  	}
  }

  75
  Đăng nhập để thêm phản hồi
• 0 ? 'sub-menu-link' : 'main-menu-link' ] . '"'; // Build HTML output and pass through the proper filter. $item_output = sprintf[ '%1$s%3$s%4$s%5$s%6$s', $args->before, $attributes, $args->link_before, apply_filters[ 'the_title', $item->title, $item->ID ], $args->link_after, $args->after ]; $output .= apply_filters[ 'walker_nav_menu_start_el', $item_output, $item, $depth, $args ]; } }18 là

  wp_nav_menu[ array[
  	'menu'   => 'Something custom walker',
  	'walker' => new WPDocs_Walker_Nav_Menu[]
  ] ];
  
  /**
   * Custom walker class.
   */
  class WPDocs_Walker_Nav_Menu extends Walker_Nav_Menu {
  
  	/**
  	 * Starts the list before the elements are added.
  	 *
  	 * Adds classes to the unordered list sub-menus.
  	 *
  	 * @param string $output Passed by reference. Used to append additional content.
  	 * @param int    $depth  Depth of menu item. Used for padding.
  	 * @param array  $args   An array of arguments. @see wp_nav_menu[]
  	 */
  	function start_lvl[ &$output, $depth = 0, $args = array[] ] {
  		// Depth-dependent classes.
  		$indent = [ $depth > 0  ? str_repeat[ "\t", $depth ] : '' ]; // code indent
  		$display_depth = [ $depth + 1]; // because it counts the first submenu as 0
  		$classes = array[
  			'sub-menu',
  			[ $display_depth % 2  ? 'menu-odd' : 'menu-even' ],
  			[ $display_depth >=2 ? 'sub-sub-menu' : '' ],
  			'menu-depth-' . $display_depth
  		];
  		$class_names = implode[ ' ', $classes ];
  
  		// Build HTML for output.
  		$output .= "\n" . $indent . '
  ' . "\n";
  	}
  
  	/**
  	 * Start the element output.
  	 *
  	 * Adds main/sub-classes to the list items and links.
  	 *
  	 * @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    $id     Current item ID.
  	 */
  	function start_el[ &$output, $item, $depth = 0, $args = array[], $id = 0 ] {
  		global $wp_query;
  		$indent = [ $depth > 0 ? str_repeat[ "\t", $depth ] : '' ]; // code indent
  
  		// Depth-dependent classes.
  		$depth_classes = array[
  			[ $depth == 0 ? 'main-menu-item' : 'sub-menu-item' ],
  			[ $depth >=2 ? 'sub-sub-menu-item' : '' ],
  			[ $depth % 2 ? 'menu-item-odd' : 'menu-item-even' ],
  			'menu-item-depth-' . $depth
  		];
  		$depth_class_names = esc_attr[ implode[ ' ', $depth_classes ] ];
  
  		// Passed classes.
  		$classes = empty[ $item->classes ] ? array[] : [array] $item->classes;
  		$class_names = esc_attr[ implode[ ' ', apply_filters[ 'nav_menu_css_class', array_filter[ $classes ], $item ] ] ];
  
  		// Build HTML.
  		$output .= $indent . '
  ';
  
  		// Link attributes.
  		$attributes  = ! empty[ $item->attr_title ] ? ' title="'  . esc_attr[ $item->attr_title ] .'"' : '';
  		$attributes .= ! empty[ $item->target ]     ? ' target="' . esc_attr[ $item->target     ] .'"' : '';
  		$attributes .= ! empty[ $item->xfn ]        ? ' rel="'    . esc_attr[ $item->xfn        ] .'"' : '';
  		$attributes .= ! empty[ $item->url ]        ? ' href="'   . esc_attr[ $item->url        ] .'"' : '';
  		$attributes .= ' class="menu-link ' . [ $depth > 0 ? 'sub-menu-link' : 'main-menu-link' ] . '"';
  
  		// Build HTML output and pass through the proper filter.
  		$item_output = sprintf[ '%1$s%3$s%4$s%5$s%6$s',
  			$args->before,
  			$attributes,
  			$args->link_before,
  			apply_filters[ 'the_title', $item->title, $item->ID ],
  			$args->link_after,
  			$args->after
  		];
  		$output .= apply_filters[ 'walker_nav_menu_start_el', $item_output, $item, $depth, $args ];
  	}
  }

  711 và

  wp_nav_menu[ array[
  	'menu'   => 'Something custom walker',
  	'walker' => new WPDocs_Walker_Nav_Menu[]
  ] ];
  
  /**
   * Custom walker class.
   */
  class WPDocs_Walker_Nav_Menu extends Walker_Nav_Menu {
  
  	/**
  	 * Starts the list before the elements are added.
  	 *
  	 * Adds classes to the unordered list sub-menus.
  	 *
  	 * @param string $output Passed by reference. Used to append additional content.
  	 * @param int    $depth  Depth of menu item. Used for padding.
  	 * @param array  $args   An array of arguments. @see wp_nav_menu[]
  	 */
  	function start_lvl[ &$output, $depth = 0, $args = array[] ] {
  		// Depth-dependent classes.
  		$indent = [ $depth > 0  ? str_repeat[ "\t", $depth ] : '' ]; // code indent
  		$display_depth = [ $depth + 1]; // because it counts the first submenu as 0
  		$classes = array[
  			'sub-menu',
  			[ $display_depth % 2  ? 'menu-odd' : 'menu-even' ],
  			[ $display_depth >=2 ? 'sub-sub-menu' : '' ],
  			'menu-depth-' . $display_depth
  		];
  		$class_names = implode[ ' ', $classes ];
  
  		// Build HTML for output.
  		$output .= "\n" . $indent . '
  ' . "\n";
  	}
  
  	/**
  	 * Start the element output.
  	 *
  	 * Adds main/sub-classes to the list items and links.
  	 *
  	 * @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    $id     Current item ID.
  	 */
  	function start_el[ &$output, $item, $depth = 0, $args = array[], $id = 0 ] {
  		global $wp_query;
  		$indent = [ $depth > 0 ? str_repeat[ "\t", $depth ] : '' ]; // code indent
  
  		// Depth-dependent classes.
  		$depth_classes = array[
  			[ $depth == 0 ? 'main-menu-item' : 'sub-menu-item' ],
  			[ $depth >=2 ? 'sub-sub-menu-item' : '' ],
  			[ $depth % 2 ? 'menu-item-odd' : 'menu-item-even' ],
  			'menu-item-depth-' . $depth
  		];
  		$depth_class_names = esc_attr[ implode[ ' ', $depth_classes ] ];
  
  		// Passed classes.
  		$classes = empty[ $item->classes ] ? array[] : [array] $item->classes;
  		$class_names = esc_attr[ implode[ ' ', apply_filters[ 'nav_menu_css_class', array_filter[ $classes ], $item ] ] ];
  
  		// Build HTML.
  		$output .= $indent . '
  ';
  
  		// Link attributes.
  		$attributes  = ! empty[ $item->attr_title ] ? ' title="'  . esc_attr[ $item->attr_title ] .'"' : '';
  		$attributes .= ! empty[ $item->target ]     ? ' target="' . esc_attr[ $item->target     ] .'"' : '';
  		$attributes .= ! empty[ $item->xfn ]        ? ' rel="'    . esc_attr[ $item->xfn        ] .'"' : '';
  		$attributes .= ! empty[ $item->url ]        ? ' href="'   . esc_attr[ $item->url        ] .'"' : '';
  		$attributes .= ' class="menu-link ' . [ $depth > 0 ? 'sub-menu-link' : 'main-menu-link' ] . '"';
  
  		// Build HTML output and pass through the proper filter.
  		$item_output = sprintf[ '%1$s%3$s%4$s%5$s%6$s',
  			$args->before,
  			$attributes,
  			$args->link_before,
  			apply_filters[ 'the_title', $item->title, $item->ID ],
  			$args->link_after,
  			$args->after
  		];
  		$output .= apply_filters[ 'walker_nav_menu_start_el', $item_output, $item, $depth, $args ];
  	}
  }

  717 nên bất kỳ giá trị nào khác sẽ khiến đối số đó không hiển thị

  • 0 ? 'sub-menu-link' : 'main-menu-link' ] . '"'; // Build HTML output and pass through the proper filter. $item_output = sprintf[ '%1$s%3$s%4$s%5$s%6$s', $args->before, $attributes, $args->link_before, apply_filters[ 'the_title', $item->title, $item->ID ], $args->link_after, $args->after ]; $output .= apply_filters[ 'walker_nav_menu_start_el', $item_output, $item, $depth, $args ]; } }89

    wp_nav_menu[ array[
    	'menu'   => 'Something custom walker',
    	'walker' => new WPDocs_Walker_Nav_Menu[]
    ] ];
    
    /**
     * Custom walker class.
     */
    class WPDocs_Walker_Nav_Menu extends Walker_Nav_Menu {
    
    	/**
    	 * Starts the list before the elements are added.
    	 *
    	 * Adds classes to the unordered list sub-menus.
    	 *
    	 * @param string $output Passed by reference. Used to append additional content.
    	 * @param int    $depth  Depth of menu item. Used for padding.
    	 * @param array  $args   An array of arguments. @see wp_nav_menu[]
    	 */
    	function start_lvl[ &$output, $depth = 0, $args = array[] ] {
    		// Depth-dependent classes.
    		$indent = [ $depth > 0  ? str_repeat[ "\t", $depth ] : '' ]; // code indent
    		$display_depth = [ $depth + 1]; // because it counts the first submenu as 0
    		$classes = array[
    			'sub-menu',
    			[ $display_depth % 2  ? 'menu-odd' : 'menu-even' ],
    			[ $display_depth >=2 ? 'sub-sub-menu' : '' ],
    			'menu-depth-' . $display_depth
    		];
    		$class_names = implode[ ' ', $classes ];
    
    		// Build HTML for output.
    		$output .= "\n" . $indent . '
    ' . "\n";
    	}
    
    	/**
    	 * Start the element output.
    	 *
    	 * Adds main/sub-classes to the list items and links.
    	 *
    	 * @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    $id     Current item ID.
    	 */
    	function start_el[ &$output, $item, $depth = 0, $args = array[], $id = 0 ] {
    		global $wp_query;
    		$indent = [ $depth > 0 ? str_repeat[ "\t", $depth ] : '' ]; // code indent
    
    		// Depth-dependent classes.
    		$depth_classes = array[
    			[ $depth == 0 ? 'main-menu-item' : 'sub-menu-item' ],
    			[ $depth >=2 ? 'sub-sub-menu-item' : '' ],
    			[ $depth % 2 ? 'menu-item-odd' : 'menu-item-even' ],
    			'menu-item-depth-' . $depth
    		];
    		$depth_class_names = esc_attr[ implode[ ' ', $depth_classes ] ];
    
    		// Passed classes.
    		$classes = empty[ $item->classes ] ? array[] : [array] $item->classes;
    		$class_names = esc_attr[ implode[ ' ', apply_filters[ 'nav_menu_css_class', array_filter[ $classes ], $item ] ] ];
    
    		// Build HTML.
    		$output .= $indent . '
    ';
    
    		// Link attributes.
    		$attributes  = ! empty[ $item->attr_title ] ? ' title="'  . esc_attr[ $item->attr_title ] .'"' : '';
    		$attributes .= ! empty[ $item->target ]     ? ' target="' . esc_attr[ $item->target     ] .'"' : '';
    		$attributes .= ! empty[ $item->xfn ]        ? ' rel="'    . esc_attr[ $item->xfn        ] .'"' : '';
    		$attributes .= ! empty[ $item->url ]        ? ' href="'   . esc_attr[ $item->url        ] .'"' : '';
    		$attributes .= ' class="menu-link ' . [ $depth > 0 ? 'sub-menu-link' : 'main-menu-link' ] . '"';
    
    		// Build HTML output and pass through the proper filter.
    		$item_output = sprintf[ '%1$s%3$s%4$s%5$s%6$s',
    			$args->before,
    			$attributes,
    			$args->link_before,
    			apply_filters[ 'the_title', $item->title, $item->ID ],
    			$args->link_after,
    			$args->after
    		];
    		$output .= apply_filters[ 'walker_nav_menu_start_el', $item_output, $item, $depth, $args ];
    	}
    }

    76
    Đăng nhập để thêm phản hồi
  • 0 ? 'sub-menu-link' : 'main-menu-link' ] . '"'; // Build HTML output and pass through the proper filter. $item_output = sprintf[ '%1$s%3$s%4$s%5$s%6$s', $args->before, $attributes, $args->link_before, apply_filters[ 'the_title', $item->title, $item->ID ], $args->link_after, $args->after ]; $output .= apply_filters[ 'walker_nav_menu_start_el', $item_output, $item, $depth, $args ]; } }719

    I. e. , đối với menu có tên 'chính', sên sẽ là '______3720'

    Bạn có thể tìm thấy sên menu trong bảng cơ sở dữ liệu thuật ngữ

    Đăng nhập để thêm phản hồi
  • 0 ? 'sub-menu-link' : 'main-menu-link' ] . '"'; // Build HTML output and pass through the proper filter. $item_output = sprintf[ '%1$s%3$s%4$s%5$s%6$s', $args->before, $attributes, $args->link_before, apply_filters[ 'the_title', $item->title, $item->ID ], $args->link_after, $args->after ]; $output .= apply_filters[ 'walker_nav_menu_start_el', $item_output, $item, $depth, $args ]; } }77
    Đăng nhập để thêm phản hồi
  • 0 ? 'sub-menu-link' : 'main-menu-link' ] . '"'; // Build HTML output and pass through the proper filter. $item_output = sprintf[ '%1$s%3$s%4$s%5$s%6$s', $args->before, $attributes, $args->link_before, apply_filters[ 'the_title', $item->title, $item->ID ], $args->link_after, $args->after ]; $output .= apply_filters[ 'walker_nav_menu_start_el', $item_output, $item, $depth, $args ]; } }78

    Sử dụng đơn giản.
    ______3721

    Đăng nhập để thêm phản hồi

  • Bạn phải đăng nhập để bình chọn về mức độ hữu ích của ghi chú nàyKết quả bình chọn cho ghi chú này. -14Bạn phải đăng nhập để bình chọn về mức độ hữu ích của ghi chú này

    Đóng góp bởi wp_smith —

    Mình hơi bối rối về thông số “before/after” và “link_before/link_after”

    Tham chiếu này cho biết “trước / sau” nằm trong liên kết, bao gồm cả văn bản liên kết và “link_before / link_after” nằm ngoài liên kết, bao gồm cả liên kết

    Điều làm tôi bối rối.
    Một số hướng dẫn nói rằng chính xác là ngược lại, [bên trong / bên ngoài].
    tại đây và tại đây
    Tôi nhận được kết quả tương tự khi xem xét một trong các cài đặt WP đang hoạt động của mình.

    Cái gì đúng?

    • Bạn đã đúng khi bối rối. các đối số trên thực tế đã được chuyển đổi về mặt tài liệu. Điều này đã được sửa trong [37561] cho 4. 6. cảm ơn vì tiền hỗ trợ. — Bởi Drew Jaynes —

      Làm cách nào để kích hoạt menu trong PHP?

      Bạn chỉ cần xác định menu của mình trong biến $nav và PHP sau sẽ tự động xem trang hiện tại có khớp với liên kết hay không, nếu đúng như vậy, nó sẽ thêm class="active" vào . Khi sử dụng lớp đang hoạt động, bạn có thể tạo kiểu cho liên kết đó theo cách khác, làm rõ rằng người dùng hiện đang ở trên trang đó. ?

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