render_block_core_navigation ( $attributes, $content, $block )
render_block_core_navigation: 这个函数用来渲染WordPress中的导航块。导航块允许用户在他们的网站上添加一个菜单: 这个函数负责生成导航块的HTML标记。
在服务器上渲染`core/navigation’区块。
function render_block_core_navigation( $attributes, $content, $block ) { static $seen_menu_names = array(); // Flag used to indicate whether the rendered output is considered to be // a fallback (i.e. the block has no menu associated with it). $is_fallback = false; $nav_menu_name = ''; /** * Deprecated: * The rgbTextColor and rgbBackgroundColor attributes * have been deprecated in favor of * customTextColor and customBackgroundColor ones. * Move the values from old attrs to the new ones. */ if ( isset( $attributes['rgbTextColor'] ) && empty( $attributes['textColor'] ) ) { $attributes['customTextColor'] = $attributes['rgbTextColor']; } if ( isset( $attributes['rgbBackgroundColor'] ) && empty( $attributes['backgroundColor'] ) ) { $attributes['customBackgroundColor'] = $attributes['rgbBackgroundColor']; } unset( $attributes['rgbTextColor'], $attributes['rgbBackgroundColor'] ); /** * This is for backwards compatibility after `isResponsive` attribute has been removed. */ $has_old_responsive_attribute = ! empty( $attributes['isResponsive'] ) && $attributes['isResponsive']; $is_responsive_menu = isset( $attributes['overlayMenu'] ) && 'never' !== $attributes['overlayMenu'] || $has_old_responsive_attribute; $should_load_view_script = ! wp_script_is( 'wp-block-navigation-view' ) && ( $is_responsive_menu || $attributes['openSubmenusOnClick'] || $attributes['showSubmenuIcon'] ); if ( $should_load_view_script ) { wp_enqueue_script( 'wp-block-navigation-view' ); } $should_load_modal_view_script = isset( $attributes['overlayMenu'] ) && 'never' !== $attributes['overlayMenu']; if ( $should_load_modal_view_script ) { wp_enqueue_script( 'wp-block-navigation-view-modal' ); } $inner_blocks = $block->inner_blocks; // Ensure that blocks saved with the legacy ref attribute name (navigationMenuId) continue to render. if ( array_key_exists( 'navigationMenuId', $attributes ) ) { $attributes['ref'] = $attributes['navigationMenuId']; } // If: // - the gutenberg plugin is active // - `__unstableLocation` is defined // - we have menu items at the defined location // - we don't have a relationship to a `wp_navigation` Post (via `ref`). // ...then create inner blocks from the classic menu assigned to that location. if ( defined( 'IS_GUTENBERG_PLUGIN' ) && IS_GUTENBERG_PLUGIN && array_key_exists( '__unstableLocation', $attributes ) && ! array_key_exists( 'ref', $attributes ) && ! empty( block_core_navigation_get_menu_items_at_location( $attributes['__unstableLocation'] ) ) ) { $menu_items = block_core_navigation_get_menu_items_at_location( $attributes['__unstableLocation'] ); if ( empty( $menu_items ) ) { return ''; } $menu_items_by_parent_id = block_core_navigation_sort_menu_items_by_parent_id( $menu_items ); $parsed_blocks = block_core_navigation_parse_blocks_from_menu_items( $menu_items_by_parent_id[0], $menu_items_by_parent_id ); $inner_blocks = new WP_Block_List( $parsed_blocks, $attributes ); } // Load inner blocks from the navigation post. if ( array_key_exists( 'ref', $attributes ) ) { $navigation_post = get_post( $attributes['ref'] ); if ( ! isset( $navigation_post ) ) { return ''; } // Only published posts are valid. If this is changed then a corresponding change // must also be implemented in `use-navigation-menu.js`. if ( 'publish' === $navigation_post->post_status ) { $nav_menu_name = $navigation_post->post_title; if ( isset( $seen_menu_names[ $nav_menu_name ] ) ) { ++$seen_menu_names[ $nav_menu_name ]; } else { $seen_menu_names[ $nav_menu_name ] = 1; } $parsed_blocks = parse_blocks( $navigation_post->post_content ); // 'parse_blocks' includes a null block with 'nn' as the content when // it encounters whitespace. This code strips it. $compacted_blocks = block_core_navigation_filter_out_empty_blocks( $parsed_blocks ); // TODO - this uses the full navigation block attributes for the // context which could be refined. $inner_blocks = new WP_Block_List( $compacted_blocks, $attributes ); } } // If there are no inner blocks then fallback to rendering an appropriate fallback. if ( empty( $inner_blocks ) ) { $is_fallback = true; // indicate we are rendering the fallback. $fallback_blocks = block_core_navigation_get_fallback_blocks(); // Fallback my have been filtered so do basic test for validity. if ( empty( $fallback_blocks ) || ! is_array( $fallback_blocks ) ) { return ''; } $inner_blocks = new WP_Block_List( $fallback_blocks, $attributes ); } /** * Filter navigation block $inner_blocks. * Allows modification of a navigation block menu items. * * @since 6.1.0 * * @param WP_Block_List $inner_blocks */ $inner_blocks = apply_filters( 'block_core_navigation_render_inner_blocks', $inner_blocks ); $layout_justification = array( 'left' => 'items-justified-left', 'right' => 'items-justified-right', 'center' => 'items-justified-center', 'space-between' => 'items-justified-space-between', ); // Restore legacy classnames for submenu positioning. $layout_class = ''; if ( isset( $attributes['layout']['justifyContent'] ) ) { $layout_class .= $layout_justification[ $attributes['layout']['justifyContent'] ]; } if ( isset( $attributes['layout']['orientation'] ) && 'vertical' === $attributes['layout']['orientation'] ) { $layout_class .= ' is-vertical'; } if ( isset( $attributes['layout']['flexWrap'] ) && 'nowrap' === $attributes['layout']['flexWrap'] ) { $layout_class .= ' no-wrap'; } // Manually add block support text decoration as CSS class. $text_decoration = _wp_array_get( $attributes, array( 'style', 'typography', 'textDecoration' ), null ); $text_decoration_class = sprintf( 'has-text-decoration-%s', $text_decoration ); $colors = block_core_navigation_build_css_colors( $attributes ); $font_sizes = block_core_navigation_build_css_font_sizes( $attributes ); $classes = array_merge( $colors['css_classes'], $font_sizes['css_classes'], $is_responsive_menu ? array( 'is-responsive' ) : array(), $layout_class ? array( $layout_class ) : array(), $is_fallback ? array( 'is-fallback' ) : array(), $text_decoration ? array( $text_decoration_class ) : array() ); $post_ids = block_core_navigation_get_post_ids( $inner_blocks ); if ( $post_ids ) { _prime_post_caches( $post_ids, false, false ); } $inner_blocks_html = ''; $is_list_open = false; foreach ( $inner_blocks as $inner_block ) { if ( ( 'core/navigation-link' === $inner_block->name || 'core/home-link' === $inner_block->name || 'core/site-title' === $inner_block->name || 'core/site-logo' === $inner_block->name || 'core/navigation-submenu' === $inner_block->name ) && ! $is_list_open ) { $is_list_open = true; $inner_blocks_html .= '<ul class="wp-block-navigation__container">'; } if ( 'core/navigation-link' !== $inner_block->name && 'core/home-link' !== $inner_block->name && 'core/site-title' !== $inner_block->name && 'core/site-logo' !== $inner_block->name && 'core/navigation-submenu' !== $inner_block->name && $is_list_open ) { $is_list_open = false; $inner_blocks_html .= '</ul>'; } $inner_block_content = $inner_block->render(); if ( 'core/site-title' === $inner_block->name || ( 'core/site-logo' === $inner_block->name && $inner_block_content ) ) { $inner_blocks_html .= '<li class="wp-block-navigation-item">' . $inner_block_content . '</li>'; } else { $inner_blocks_html .= $inner_block_content; } } if ( $is_list_open ) { $inner_blocks_html .= '</ul>'; } $block_styles = isset( $attributes['styles'] ) ? $attributes['styles'] : ''; // If the menu name has been used previously then append an ID // to the name to ensure uniqueness across a given post. if ( isset( $seen_menu_names[ $nav_menu_name ] ) && $seen_menu_names[ $nav_menu_name ] > 1 ) { $count = $seen_menu_names[ $nav_menu_name ]; $nav_menu_name = $nav_menu_name . ' ' . ( $count ); } $wrapper_attributes = get_block_wrapper_attributes( array( 'class' => implode( ' ', $classes ), 'style' => $block_styles . $colors['inline_styles'] . $font_sizes['inline_styles'], 'aria-label' => $nav_menu_name, ) ); $modal_unique_id = wp_unique_id( 'modal-' ); // Determine whether or not navigation elements should be wrapped in the markup required to make it responsive, // return early if they don't. if ( ! $is_responsive_menu ) { return sprintf( '<nav %1$s>%2$s</nav>', $wrapper_attributes, $inner_blocks_html ); } $is_hidden_by_default = isset( $attributes['overlayMenu'] ) && 'always' === $attributes['overlayMenu']; $responsive_container_classes = array( 'wp-block-navigation__responsive-container', $is_hidden_by_default ? 'hidden-by-default' : '', implode( ' ', $colors['overlay_css_classes'] ), ); $open_button_classes = array( 'wp-block-navigation__responsive-container-open', $is_hidden_by_default ? 'always-shown' : '', ); $should_display_icon_label = isset( $attributes['hasIcon'] ) && true === $attributes['hasIcon']; $toggle_button_icon = '<svg width="24" height="24" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" aria-hidden="true" focusable="false"><rect x="4" y="7.5" width="16" height="1.5" /><rect x="4" y="15" width="16" height="1.5" /></svg>'; if ( isset( $attributes['icon'] ) ) { if ( 'menu' === $attributes['icon'] ) { $toggle_button_icon = '<svg width="24" height="24" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M5 5v1.5h14V5H5zm0 7.8h14v-1.5H5v1.5zM5 19h14v-1.5H5V19z" /></svg>'; } } $toggle_button_content = $should_display_icon_label ? $toggle_button_icon : __( 'Menu' ); $toggle_close_button_icon = '<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" width="24" height="24" aria-hidden="true" focusable="false"><path d="M13 11.8l6.1-6.3-1-1-6.1 6.2-6.1-6.2-1 1 6.1 6.3-6.5 6.7 1 1 6.5-6.6 6.5 6.6 1-1z"></path></svg>'; $toggle_close_button_content = $should_display_icon_label ? $toggle_close_button_icon : __( 'Close' ); $toggle_aria_label_open = $should_display_icon_label ? 'aria-label="' . __( 'Open menu' ) . '"' : ''; // Open button label. $toggle_aria_label_close = $should_display_icon_label ? 'aria-label="' . __( 'Close menu' ) . '"' : ''; // Close button label. $responsive_container_markup = sprintf( '<button aria-haspopup="true" %3$s class="%6$s" data-micromodal-trigger="%1$s">%9$s</button> <div class="%5$s" style="%7$s" id="%1$s"> <div class="wp-block-navigation__responsive-close" tabindex="-1" data-micromodal-close> <div class="wp-block-navigation__responsive-dialog" aria-label="%8$s"> <button %4$s data-micromodal-close class="wp-block-navigation__responsive-container-close">%10$s</button> <div class="wp-block-navigation__responsive-container-content" id="%1$s-content"> %2$s </div> </div> </div> </div>', esc_attr( $modal_unique_id ), $inner_blocks_html, $toggle_aria_label_open, $toggle_aria_label_close, esc_attr( implode( ' ', $responsive_container_classes ) ), esc_attr( implode( ' ', $open_button_classes ) ), esc_attr( safecss_filter_attr( $colors['overlay_inline_styles'] ) ), __( 'Menu' ), $toggle_button_content, $toggle_close_button_content ); return sprintf( '<nav %1$s>%2$s</nav>', $wrapper_attributes, $responsive_container_markup ); }
要使用` get_users
`函数获取所有用户列表,可以按照以下步骤进行:
1. 使用` get_users
`函数调用获取用户列表:
$users = get_users();
2. 您可以按需使用参数来过滤结果。例如,您可以通过角色、用户ID、用户登录名等过滤用户列表。以下是一个根据用户角色为过滤条件的示例:
$users = get_users( array( 'role' => 'subscriber' // 将角色名称替换为您要过滤的角色 ) );
在上述示例中,将` role
`参数设置为所需的角色名称来过滤用户列表。
3. 您可以使用循环遍历获取的用户列表,并访问每个用户的属性。例如,以下示例将显示每个用户的用户名和电子邮件地址:
foreach( $users as $user ) { echo '用户名:' . $user->user_login . ', 电子邮件:' . $user->user_email . ; }
在上述示例中,通过` $user->user_login
`和` $user->user_email
`访问每个用户的用户名和电子邮件地址。
请注意,` get_users
`函数默认返回所有用户,并可以根据需要使用更多参数进行过滤。您可以参阅WordPress官方文档中的` get_users
`函数文档,了解更多可用参数和用法示例。
总结起来,使用` get_users
`函数获取所有用户列表的步骤是:
get_users
`函数获取用户列表。在WordPress中,可以使用WP_PLUGIN_DIR和WP_PLUGIN_URL常量来定义插件的目录路径和URL。
1. `WP_PLUGIN_DIR`:这是一个常量,用于定义插件的目录路径(文件系统路径)。您可以使用以下代码在插件文件中访问该常量:
$plugin_dir = WP_PLUGIN_DIR . '/your-plugin-folder/';
在上述代码中,将"your-plugin-folder"替换为您插件的实际文件夹名称。使用该常量,您可以获取插件文件的完整路径。
2. `WP_PLUGIN_URL`:这是一个常量,用于定义插件的URL(用于在网页上访问插件文件)。以下是一个使用该常量的示例:
$plugin_url = WP_PLUGIN_URL . '/your-plugin-folder/';
同样,请将"your-plugin-folder"替换为您插件的实际文件夹名称。使用该常量,您可以获取插件在网页上的完整URL。
请注意,`WP_PLUGIN_DIR`和`WP_PLUGIN_URL`常量在WordPress版本2.6之后引入。从WordPress 5.5版本开始,这两个常量被标记为过时(deprecated),因为WordPress更倾向于使用新的插件文件结构。如果您正在开发新插件,建议使用新的插件文件结构和相关函数。
在新的插件文件结构中,可以使用以下函数来获取插件的目录路径和URL:
- `plugin_dir_path()`:获取插件目录路径。
- `plugin_dir_url()`:获取插件URL。
这些函数会自动将插件的版本、多站点和SSL等考虑因素纳入计算。
总结起来,使用`WP_PLUGIN_DIR`和`WP_PLUGIN_URL`常量定义插件的目录和URL的方法是:
$plugin_dir = WP_PLUGIN_DIR . '/your-plugin-folder/'; $plugin_url = WP_PLUGIN_URL . '/your-plugin-folder/';
但请注意,这两个常量已被标记为过时,建议使用新的插件文件结构和相关函数来获取插件的路径和URL。
使用PHP在WordPress中添加自定义功能可以通过以下方式实现:
下面是一个实操示例。
要在WordPress中添加自定义功能,可以按照以下步骤使用PHP编写并添加自定义功能:
// 添加自定义功能示例 // 1. 创建自定义短代码 function custom_shortcode() { return '这是我的自定义短代码内容'; } add_shortcode('custom', 'custom_shortcode'); // 2. 自定义小工具 function custom_widget() { echo '这是我的自定义小工具内容'; } register_widget('custom_widget'); // 3. 自定义菜单 function custom_menu() { register_nav_menu('custom-menu', '自定义菜单'); } add_action('after_setup_theme', 'custom_menu'); // 4. 自定义页面模板 function custom_page_template() { /* Template Name: 自定义模板 */ // 自定义模板的内容和样式 }
请注意,修改主题文件可以在主题更新时丢失,因此建议在进行任何更改之前备份functions.php文件。此外,为避免不必要的错误和冲突,建议在添加自定义功能前先了解WordPress开发文档和最佳实践,以确保正确、安全地实现所需的自定义功能。
使用 do_action
函数可以触发一个钩子函数。do_action
函数的参数与要触发的钩子函数的参数相同。
例如,触发save_post钩子函数的代码如下:
do_action( 'save_post', $post_ID, $post );
这里,$post_ID
和 $post
是传递给钩子函数的参数。
使用 wp_get_current_user
获取当前登录用户的信息:
$current_user = wp_get_current_user(); // 获取当前用户的ID $user_id = $current_user->ID; // 获取当前用户的用户名 $user_login = $current_user->user_login; // 获取当前用户的邮箱 $user_email = $current_user->user_email; // 获取当前用户的显示名称 $display_name = $current_user->display_name;