export_wp ( $args = array() )
export_wp: 这个函数用来生成一个包含WordPress网站数据的XML文件,可以用来导入数据到另一个网站。
生成WXR导出文件供下载。
默认行为是导出所有内容,但是,请注意,只有启用`can_export`参数的文章类型,才会导出文章内容。任何具有”自动起草”状态的文章将被跳过。
function export_wp( $args = array() ) { global $wpdb, $post; $defaults = array( 'content' => 'all', 'author' => false, 'category' => false, 'start_date' => false, 'end_date' => false, 'status' => false, ); $args = wp_parse_args( $args, $defaults ); /** * Fires at the beginning of an export, before any headers are sent. * * @since 2.3.0 * * @param array $args An array of export arguments. */ do_action( 'export_wp', $args ); $sitename = sanitize_key( get_bloginfo( 'name' ) ); if ( ! empty( $sitename ) ) { $sitename .= '.'; } $date = gmdate( 'Y-m-d' ); $wp_filename = $sitename . 'WordPress.' . $date . '.xml'; /** * Filters the export filename. * * @since 4.4.0 * * @param string $wp_filename The name of the file for download. * @param string $sitename The site name. * @param string $date Today's date, formatted. */ $filename = apply_filters( 'export_wp_filename', $wp_filename, $sitename, $date ); header( 'Content-Description: File Transfer' ); header( 'Content-Disposition: attachment; filename=' . $filename ); header( 'Content-Type: text/xml; charset=' . get_option( 'blog_charset' ), true ); if ( 'all' !== $args['content'] && post_type_exists( $args['content'] ) ) { $ptype = get_post_type_object( $args['content'] ); if ( ! $ptype->can_export ) { $args['content'] = 'post'; } $where = $wpdb->prepare( "{$wpdb->posts}.post_type = %s", $args['content'] ); } else { $post_types = get_post_types( array( 'can_export' => true ) ); $esses = array_fill( 0, count( $post_types ), '%s' ); // phpcs:ignore WordPress.DB.PreparedSQLPlaceholders.UnfinishedPrepare $where = $wpdb->prepare( "{$wpdb->posts}.post_type IN (" . implode( ',', $esses ) . ')', $post_types ); } if ( $args['status'] && ( 'post' === $args['content'] || 'page' === $args['content'] ) ) { $where .= $wpdb->prepare( " AND {$wpdb->posts}.post_status = %s", $args['status'] ); } else { $where .= " AND {$wpdb->posts}.post_status != 'auto-draft'"; } $join = ''; if ( $args['category'] && 'post' === $args['content'] ) { $term = term_exists( $args['category'], 'category' ); if ( $term ) { $join = "INNER JOIN {$wpdb->term_relationships} ON ({$wpdb->posts}.ID = {$wpdb->term_relationships}.object_id)"; $where .= $wpdb->prepare( " AND {$wpdb->term_relationships}.term_taxonomy_id = %d", $term['term_taxonomy_id'] ); } } if ( in_array( $args['content'], array( 'post', 'page', 'attachment' ), true ) ) { if ( $args['author'] ) { $where .= $wpdb->prepare( " AND {$wpdb->posts}.post_author = %d", $args['author'] ); } if ( $args['start_date'] ) { $where .= $wpdb->prepare( " AND {$wpdb->posts}.post_date >= %s", gmdate( 'Y-m-d', strtotime( $args['start_date'] ) ) ); } if ( $args['end_date'] ) { $where .= $wpdb->prepare( " AND {$wpdb->posts}.post_date < %s", gmdate( 'Y-m-d', strtotime( '+1 month', strtotime( $args['end_date'] ) ) ) ); } } // Grab a snapshot of post IDs, just in case it changes during the export. $post_ids = $wpdb->get_col( "SELECT ID FROM {$wpdb->posts} $join WHERE $where" ); /* * Get the requested terms ready, empty unless posts filtered by category * or all content. */ $cats = array(); $tags = array(); $terms = array(); if ( isset( $term ) && $term ) { $cat = get_term( $term['term_id'], 'category' ); $cats = array( $cat->term_id => $cat ); unset( $term, $cat ); } elseif ( 'all' === $args['content'] ) { $categories = (array) get_categories( array( 'get' => 'all' ) ); $tags = (array) get_tags( array( 'get' => 'all' ) ); $custom_taxonomies = get_taxonomies( array( '_builtin' => false ) ); $custom_terms = (array) get_terms( array( 'taxonomy' => $custom_taxonomies, 'get' => 'all', ) ); // Put categories in order with no child going before its parent. while ( $cat = array_shift( $categories ) ) { if ( ! $cat->parent || isset( $cats[ $cat->parent ] ) ) { $cats[ $cat->term_id ] = $cat; } else { $categories[] = $cat; } } // Put terms in order with no child going before its parent. while ( $t = array_shift( $custom_terms ) ) { if ( ! $t->parent || isset( $terms[ $t->parent ] ) ) { $terms[ $t->term_id ] = $t; } else { $custom_terms[] = $t; } } unset( $categories, $custom_taxonomies, $custom_terms ); } /** * Wraps given string in XML CDATA tag. * * @since 2.1.0 * * @param string $str String to wrap in XML CDATA tag. * @return string */ function wxr_cdata( $str ) { if ( ! seems_utf8( $str ) ) { $str = utf8_encode( $str ); } // $str = ent2ncr(esc_html($str)); $str = '<![CDATA[' . str_replace( ']]>', ']]]]><![CDATA[>', $str ) . ']]>'; return $str; } /** * Returns the URL of the site. * * @since 2.5.0 * * @return string Site URL. */ function wxr_site_url() { if ( is_multisite() ) { // Multisite: the base URL. return network_home_url(); } else { // WordPress (single site): the blog URL. return get_bloginfo_rss( 'url' ); } } /** * Outputs a cat_name XML tag from a given category object. * * @since 2.1.0 * * @param WP_Term $category Category Object. */ function wxr_cat_name( $category ) { if ( empty( $category->name ) ) { return; } echo '<wp:cat_name>' . wxr_cdata( $category->name ) . "</wp:cat_name>n"; } /** * Outputs a category_description XML tag from a given category object. * * @since 2.1.0 * * @param WP_Term $category Category Object. */ function wxr_category_description( $category ) { if ( empty( $category->description ) ) { return; } echo '<wp:category_description>' . wxr_cdata( $category->description ) . "</wp:category_description>n"; } /** * Outputs a tag_name XML tag from a given tag object. * * @since 2.3.0 * * @param WP_Term $tag Tag Object. */ function wxr_tag_name( $tag ) { if ( empty( $tag->name ) ) { return; } echo '<wp:tag_name>' . wxr_cdata( $tag->name ) . "</wp:tag_name>n"; } /** * Outputs a tag_description XML tag from a given tag object. * * @since 2.3.0 * * @param WP_Term $tag Tag Object. */ function wxr_tag_description( $tag ) { if ( empty( $tag->description ) ) { return; } echo '<wp:tag_description>' . wxr_cdata( $tag->description ) . "</wp:tag_description>n"; } /** * Outputs a term_name XML tag from a given term object. * * @since 2.9.0 * * @param WP_Term $term Term Object. */ function wxr_term_name( $term ) { if ( empty( $term->name ) ) { return; } echo '<wp:term_name>' . wxr_cdata( $term->name ) . "</wp:term_name>n"; } /** * Outputs a term_description XML tag from a given term object. * * @since 2.9.0 * * @param WP_Term $term Term Object. */ function wxr_term_description( $term ) { if ( empty( $term->description ) ) { return; } echo "tt<wp:term_description>" . wxr_cdata( $term->description ) . "</wp:term_description>n"; } /** * Outputs term meta XML tags for a given term object. * * @since 4.6.0 * * @param WP_Term $term Term object. */ function wxr_term_meta( $term ) { global $wpdb; $termmeta = $wpdb->get_results( $wpdb->prepare( "SELECT * FROM $wpdb->termmeta WHERE term_id = %d", $term->term_id ) ); foreach ( $termmeta as $meta ) { /** * Filters whether to selectively skip term meta used for WXR exports. * * Returning a truthy value from the filter will skip the current meta * object from being exported. * * @since 4.6.0 * * @param bool $skip Whether to skip the current piece of term meta. Default false. * @param string $meta_key Current meta key. * @param object $meta Current meta object. */ if ( ! apply_filters( 'wxr_export_skip_termmeta', false, $meta->meta_key, $meta ) ) { printf( "tt<wp:termmeta>nttt<wp:meta_key>%s</wp:meta_key>nttt<wp:meta_value>%s</wp:meta_value>ntt</wp:termmeta>n", wxr_cdata( $meta->meta_key ), wxr_cdata( $meta->meta_value ) ); } } } /** * Outputs list of authors with posts. * * @since 3.1.0 * * @global wpdb $wpdb WordPress database abstraction object. * * @param int[] $post_ids Optional. Array of post IDs to filter the query by. */ function wxr_authors_list( array $post_ids = null ) { global $wpdb; if ( ! empty( $post_ids ) ) { $post_ids = array_map( 'absint', $post_ids ); $and = 'AND ID IN ( ' . implode( ', ', $post_ids ) . ')'; } else { $and = ''; } $authors = array(); $results = $wpdb->get_results( "SELECT DISTINCT post_author FROM $wpdb->posts WHERE post_status != 'auto-draft' $and" ); foreach ( (array) $results as $result ) { $authors[] = get_userdata( $result->post_author ); } $authors = array_filter( $authors ); foreach ( $authors as $author ) { echo "t<wp:author>"; echo '<wp:author_id>' . (int) $author->ID . '</wp:author_id>'; echo '<wp:author_login>' . wxr_cdata( $author->user_login ) . '</wp:author_login>'; echo '<wp:author_email>' . wxr_cdata( $author->user_email ) . '</wp:author_email>'; echo '<wp:author_display_name>' . wxr_cdata( $author->display_name ) . '</wp:author_display_name>'; echo '<wp:author_first_name>' . wxr_cdata( $author->first_name ) . '</wp:author_first_name>'; echo '<wp:author_last_name>' . wxr_cdata( $author->last_name ) . '</wp:author_last_name>'; echo "</wp:author>n"; } } /** * Outputs all navigation menu terms. * * @since 3.1.0 */ function wxr_nav_menu_terms() { $nav_menus = wp_get_nav_menus(); if ( empty( $nav_menus ) || ! is_array( $nav_menus ) ) { return; } foreach ( $nav_menus as $menu ) { echo "t<wp:term>"; echo '<wp:term_id>' . (int) $menu->term_id . '</wp:term_id>'; echo '<wp:term_taxonomy>nav_menu</wp:term_taxonomy>'; echo '<wp:term_slug>' . wxr_cdata( $menu->slug ) . '</wp:term_slug>'; wxr_term_name( $menu ); echo "</wp:term>n"; } } /** * Outputs list of taxonomy terms, in XML tag format, associated with a post. * * @since 2.3.0 */ function wxr_post_taxonomy() { $post = get_post(); $taxonomies = get_object_taxonomies( $post->post_type ); if ( empty( $taxonomies ) ) { return; } $terms = wp_get_object_terms( $post->ID, $taxonomies ); foreach ( (array) $terms as $term ) { echo "tt<category domain="{$term->taxonomy}" nicename="{$term->slug}">" . wxr_cdata( $term->name ) . "</category>n"; } } /** * Determines whether to selectively skip post meta used for WXR exports. * * @since 3.3.0 * * @param bool $return_me Whether to skip the current post meta. Default false. * @param string $meta_key Meta key. * @return bool */ function wxr_filter_postmeta( $return_me, $meta_key ) { if ( '_edit_lock' === $meta_key ) { $return_me = true; } return $return_me; } add_filter( 'wxr_export_skip_postmeta', 'wxr_filter_postmeta', 10, 2 ); echo '<?xml version="1.0" encoding="' . get_bloginfo( 'charset' ) . "" ?>n"; ?> <!-- This is a WordPress eXtended RSS file generated by WordPress as an export of your site. --> <!-- It contains information about your site's posts, pages, comments, categories, and other content. --> <!-- You may use this file to transfer that content from one site to another. --> <!-- This file is not intended to serve as a complete backup of your site. --> <!-- To import this information into a WordPress site follow these steps: --> <!-- 1. Log in to that site as an administrator. --> <!-- 2. Go to Tools: Import in the WordPress admin panel. --> <!-- 3. Install the "WordPress" importer from the list. --> <!-- 4. Activate & Run Importer. --> <!-- 5. Upload this file using the form provided on that page. --> <!-- 6. You will first be asked to map the authors in this export file to users --> <!-- on the site. For each author, you may choose to map to an --> <!-- existing user on the site or to create a new user. --> <!-- 7. WordPress will then import each of the posts, pages, comments, categories, etc. --> <!-- contained in this file into your site. --> <?php the_generator( 'export' ); ?> <rss version="2.0" xmlns:excerpt="http://wordpress.org/export/<?php echo WXR_VERSION; ?>/excerpt/" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:wfw="http://wellformedweb.org/CommentAPI/" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:wp="http://wordpress.org/export/<?php echo WXR_VERSION; ?>/" > <channel> <title><?php bloginfo_rss( 'name' ); ?></title> <link><?php bloginfo_rss( 'url' ); ?></link> <description><?php bloginfo_rss( 'description' ); ?></description> <pubDate><?php echo gmdate( 'D, d M Y H:i:s +0000' ); ?></pubDate> <language><?php bloginfo_rss( 'language' ); ?></language> <wp:wxr_version><?php echo WXR_VERSION; ?></wp:wxr_version> <wp:base_site_url><?php echo wxr_site_url(); ?></wp:base_site_url> <wp:base_blog_url><?php bloginfo_rss( 'url' ); ?></wp:base_blog_url> <?php wxr_authors_list( $post_ids ); ?> <?php foreach ( $cats as $c ) : ?> <wp:category> <wp:term_id><?php echo (int) $c->term_id; ?></wp:term_id> <wp:category_nicename><?php echo wxr_cdata( $c->slug ); ?></wp:category_nicename> <wp:category_parent><?php echo wxr_cdata( $c->parent ? $cats[ $c->parent ]->slug : '' ); ?></wp:category_parent> <?php wxr_cat_name( $c ); wxr_category_description( $c ); wxr_term_meta( $c ); ?> </wp:category> <?php endforeach; ?> <?php foreach ( $tags as $t ) : ?> <wp:tag> <wp:term_id><?php echo (int) $t->term_id; ?></wp:term_id> <wp:tag_slug><?php echo wxr_cdata( $t->slug ); ?></wp:tag_slug> <?php wxr_tag_name( $t ); wxr_tag_description( $t ); wxr_term_meta( $t ); ?> </wp:tag> <?php endforeach; ?> <?php foreach ( $terms as $t ) : ?> <wp:term> <wp:term_id><?php echo (int) $t->term_id; ?></wp:term_id> <wp:term_taxonomy><?php echo wxr_cdata( $t->taxonomy ); ?></wp:term_taxonomy> <wp:term_slug><?php echo wxr_cdata( $t->slug ); ?></wp:term_slug> <wp:term_parent><?php echo wxr_cdata( $t->parent ? $terms[ $t->parent ]->slug : '' ); ?></wp:term_parent> <?php wxr_term_name( $t ); wxr_term_description( $t ); wxr_term_meta( $t ); ?> </wp:term> <?php endforeach; ?> <?php if ( 'all' === $args['content'] ) { wxr_nav_menu_terms();} ?> <?php /** This action is documented in wp-includes/feed-rss2.php */ do_action( 'rss2_head' ); ?> <?php if ( $post_ids ) { /** * @global WP_Query $wp_query WordPress Query object. */ global $wp_query; // Fake being in the loop. $wp_query->in_the_loop = true; // Fetch 20 posts at a time rather than loading the entire table into memory. while ( $next_posts = array_splice( $post_ids, 0, 20 ) ) { $where = 'WHERE ID IN (' . implode( ',', $next_posts ) . ')'; $posts = $wpdb->get_results( "SELECT * FROM {$wpdb->posts} $where" ); // Begin Loop. foreach ( $posts as $post ) { setup_postdata( $post ); /** * Filters the post title used for WXR exports. * * @since 5.7.0 * * @param string $post_title Title of the current post. */ $title = wxr_cdata( apply_filters( 'the_title_export', $post->post_title ) ); /** * Filters the post content used for WXR exports. * * @since 2.5.0 * * @param string $post_content Content of the current post. */ $content = wxr_cdata( apply_filters( 'the_content_export', $post->post_content ) ); /** * Filters the post excerpt used for WXR exports. * * @since 2.6.0 * * @param string $post_excerpt Excerpt for the current post. */ $excerpt = wxr_cdata( apply_filters( 'the_excerpt_export', $post->post_excerpt ) ); $is_sticky = is_sticky( $post->ID ) ? 1 : 0; ?> <item> <title><?php echo $title; ?></title> <link><?php the_permalink_rss(); ?></link> <pubDate><?php echo mysql2date( 'D, d M Y H:i:s +0000', get_post_time( 'Y-m-d H:i:s', true ), false ); ?></pubDate> <dc:creator><?php echo wxr_cdata( get_the_author_meta( 'login' ) ); ?></dc:creator> <guid isPermaLink="false"><?php the_guid(); ?></guid> <description></description> <content:encoded><?php echo $content; ?></content:encoded> <excerpt:encoded><?php echo $excerpt; ?></excerpt:encoded> <wp:post_id><?php echo (int) $post->ID; ?></wp:post_id> <wp:post_date><?php echo wxr_cdata( $post->post_date ); ?></wp:post_date> <wp:post_date_gmt><?php echo wxr_cdata( $post->post_date_gmt ); ?></wp:post_date_gmt> <wp:post_modified><?php echo wxr_cdata( $post->post_modified ); ?></wp:post_modified> <wp:post_modified_gmt><?php echo wxr_cdata( $post->post_modified_gmt ); ?></wp:post_modified_gmt> <wp:comment_status><?php echo wxr_cdata( $post->comment_status ); ?></wp:comment_status> <wp:ping_status><?php echo wxr_cdata( $post->ping_status ); ?></wp:ping_status> <wp:post_name><?php echo wxr_cdata( $post->post_name ); ?></wp:post_name> <wp:status><?php echo wxr_cdata( $post->post_status ); ?></wp:status> <wp:post_parent><?php echo (int) $post->post_parent; ?></wp:post_parent> <wp:menu_order><?php echo (int) $post->menu_order; ?></wp:menu_order> <wp:post_type><?php echo wxr_cdata( $post->post_type ); ?></wp:post_type> <wp:post_password><?php echo wxr_cdata( $post->post_password ); ?></wp:post_password> <wp:is_sticky><?php echo (int) $is_sticky; ?></wp:is_sticky> <?php if ( 'attachment' === $post->post_type ) : ?> <wp:attachment_url><?php echo wxr_cdata( wp_get_attachment_url( $post->ID ) ); ?></wp:attachment_url> <?php endif; ?> <?php wxr_post_taxonomy(); ?> <?php $postmeta = $wpdb->get_results( $wpdb->prepare( "SELECT * FROM $wpdb->postmeta WHERE post_id = %d", $post->ID ) ); foreach ( $postmeta as $meta ) : /** * Filters whether to selectively skip post meta used for WXR exports. * * Returning a truthy value from the filter will skip the current meta * object from being exported. * * @since 3.3.0 * * @param bool $skip Whether to skip the current post meta. Default false. * @param string $meta_key Current meta key. * @param object $meta Current meta object. */ if ( apply_filters( 'wxr_export_skip_postmeta', false, $meta->meta_key, $meta ) ) { continue; } ?> <wp:postmeta> <wp:meta_key><?php echo wxr_cdata( $meta->meta_key ); ?></wp:meta_key> <wp:meta_value><?php echo wxr_cdata( $meta->meta_value ); ?></wp:meta_value> </wp:postmeta> <?php endforeach; $_comments = $wpdb->get_results( $wpdb->prepare( "SELECT * FROM $wpdb->comments WHERE comment_post_ID = %d AND comment_approved <> 'spam'", $post->ID ) ); $comments = array_map( 'get_comment', $_comments ); foreach ( $comments as $c ) : ?> <wp:comment> <wp:comment_id><?php echo (int) $c->comment_ID; ?></wp:comment_id> <wp:comment_author><?php echo wxr_cdata( $c->comment_author ); ?></wp:comment_author> <wp:comment_author_email><?php echo wxr_cdata( $c->comment_author_email ); ?></wp:comment_author_email> <wp:comment_author_url><?php echo sanitize_url( $c->comment_author_url ); ?></wp:comment_author_url> <wp:comment_author_IP><?php echo wxr_cdata( $c->comment_author_IP ); ?></wp:comment_author_IP> <wp:comment_date><?php echo wxr_cdata( $c->comment_date ); ?></wp:comment_date> <wp:comment_date_gmt><?php echo wxr_cdata( $c->comment_date_gmt ); ?></wp:comment_date_gmt> <wp:comment_content><?php echo wxr_cdata( $c->comment_content ); ?></wp:comment_content> <wp:comment_approved><?php echo wxr_cdata( $c->comment_approved ); ?></wp:comment_approved> <wp:comment_type><?php echo wxr_cdata( $c->comment_type ); ?></wp:comment_type> <wp:comment_parent><?php echo (int) $c->comment_parent; ?></wp:comment_parent> <wp:comment_user_id><?php echo (int) $c->user_id; ?></wp:comment_user_id> <?php $c_meta = $wpdb->get_results( $wpdb->prepare( "SELECT * FROM $wpdb->commentmeta WHERE comment_id = %d", $c->comment_ID ) ); foreach ( $c_meta as $meta ) : /** * Filters whether to selectively skip comment meta used for WXR exports. * * Returning a truthy value from the filter will skip the current meta * object from being exported. * * @since 4.0.0 * * @param bool $skip Whether to skip the current comment meta. Default false. * @param string $meta_key Current meta key. * @param object $meta Current meta object. */ if ( apply_filters( 'wxr_export_skip_commentmeta', false, $meta->meta_key, $meta ) ) { continue; } ?> <wp:commentmeta> <wp:meta_key><?php echo wxr_cdata( $meta->meta_key ); ?></wp:meta_key> <wp:meta_value><?php echo wxr_cdata( $meta->meta_value ); ?></wp:meta_value> </wp:commentmeta> <?php endforeach; ?> </wp:comment> <?php endforeach; ?> </item> <?php } } } ?> </channel> </rss> <?php }
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;