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add_submenu_page ( $parent_slug, $page_title, $menu_title, $capability, $menu_slug, $callback = '', $position = null )
add_submenu_page – 在WordPress仪表盘的现有菜单中添加一个新的子菜单页。它需要几个参数,包括父菜单的slug、页面标题、菜单标题、页面所需的权限、页面的URL以及生成页面内容的回调函数。
添加一个子菜单页面。
这个函数接受一个权限,这个权限将被用来决定一个页面是否被包含在菜单中。
钩住处理页面输出的函数必须检查用户是否具有所需的权限。
function add_submenu_page( $parent_slug, $page_title, $menu_title, $capability, $menu_slug, $callback = '', $position = null ) { global $submenu, $menu, $_wp_real_parent_file, $_wp_submenu_nopriv, $_registered_pages, $_parent_pages; $menu_slug = plugin_basename( $menu_slug ); $parent_slug = plugin_basename( $parent_slug ); if ( isset( $_wp_real_parent_file[ $parent_slug ] ) ) { $parent_slug = $_wp_real_parent_file[ $parent_slug ]; } if ( ! current_user_can( $capability ) ) { $_wp_submenu_nopriv[ $parent_slug ][ $menu_slug ] = true; return false; } /* * If the parent doesn't already have a submenu, add a link to the parent * as the first item in the submenu. If the submenu file is the same as the * parent file someone is trying to link back to the parent manually. In * this case, don't automatically add a link back to avoid duplication. */ if ( ! isset( $submenu[ $parent_slug ] ) && $menu_slug !== $parent_slug ) { foreach ( (array) $menu as $parent_menu ) { if ( $parent_menu[2] === $parent_slug && current_user_can( $parent_menu[1] ) ) { $submenu[ $parent_slug ][] = array_slice( $parent_menu, 0, 4 ); } } } $new_sub_menu = array( $menu_title, $capability, $menu_slug, $page_title ); if ( null !== $position && ! is_numeric( $position ) ) { _doing_it_wrong( __FUNCTION__, sprintf( /* translators: %s: add_submenu_page() */ __( 'The seventh parameter passed to %s should be numeric representing menu position.' ), '<code>add_submenu_page()</code>' ), '5.3.0' ); $position = null; } if ( null === $position || ( ! isset( $submenu[ $parent_slug ] ) || $position >= count( $submenu[ $parent_slug ] ) ) ) { $submenu[ $parent_slug ][] = $new_sub_menu; } else { // Test for a negative position. $position = max( $position, 0 ); if ( 0 === $position ) { // For negative or `0` positions, prepend the submenu. array_unshift( $submenu[ $parent_slug ], $new_sub_menu ); } else { $position = absint( $position ); // Grab all of the items before the insertion point. $before_items = array_slice( $submenu[ $parent_slug ], 0, $position, true ); // Grab all of the items after the insertion point. $after_items = array_slice( $submenu[ $parent_slug ], $position, null, true ); // Add the new item. $before_items[] = $new_sub_menu; // Merge the items. $submenu[ $parent_slug ] = array_merge( $before_items, $after_items ); } } // Sort the parent array. ksort( $submenu[ $parent_slug ] ); $hookname = get_plugin_page_hookname( $menu_slug, $parent_slug ); if ( ! empty( $callback ) && ! empty( $hookname ) ) { add_action( $hookname, $callback ); } $_registered_pages[ $hookname ] = true; /* * Backward-compatibility for plugins using add_management_page(). * See wp-admin/admin.php for redirect from edit.php to tools.php. */ if ( 'tools.php' === $parent_slug ) { $_registered_pages[ get_plugin_page_hookname( $menu_slug, 'edit.php' ) ] = true; } // No parent as top level. $_parent_pages[ $menu_slug ] = $parent_slug; return $hookname; }