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<?php /** * Backend functions. * * @package Yoast\WP\Duplicate_Post * @since 2.0 */ if ( ! is_admin() ) { return; } use Yoast\WP\Duplicate_Post\UI\Newsletter; require_once DUPLICATE_POST_PATH . 'options.php'; require_once DUPLICATE_POST_PATH . 'compat/wpml-functions.php'; require_once DUPLICATE_POST_PATH . 'compat/jetpack-functions.php'; /** * Wrapper for the option 'duplicate_post_version'. */ function duplicate_post_get_installed_version() { return get_option( 'duplicate_post_version' ); } /** * Wrapper for the defined constant DUPLICATE_POST_CURRENT_VERSION. */ function duplicate_post_get_current_version() { return DUPLICATE_POST_CURRENT_VERSION; } add_action( 'admin_init', 'duplicate_post_admin_init' ); /** * Adds handlers depending on the options. */ function duplicate_post_admin_init() { duplicate_post_plugin_upgrade(); if ( intval( get_site_option( 'duplicate_post_show_notice' ) ) === 1 ) { if ( is_multisite() ) { add_action( 'network_admin_notices', 'duplicate_post_show_update_notice' ); } else { add_action( 'admin_notices', 'duplicate_post_show_update_notice' ); } add_action( 'wp_ajax_duplicate_post_dismiss_notice', 'duplicate_post_dismiss_notice' ); } add_action( 'dp_duplicate_post', 'duplicate_post_copy_post_meta_info', 10, 2 ); add_action( 'dp_duplicate_page', 'duplicate_post_copy_post_meta_info', 10, 2 ); if ( intval( get_option( 'duplicate_post_copychildren' ) ) === 1 ) { add_action( 'dp_duplicate_post', 'duplicate_post_copy_children', 20, 3 ); add_action( 'dp_duplicate_page', 'duplicate_post_copy_children', 20, 3 ); } if ( intval( get_option( 'duplicate_post_copyattachments' ) ) === 1 ) { add_action( 'dp_duplicate_post', 'duplicate_post_copy_attachments', 30, 2 ); add_action( 'dp_duplicate_page', 'duplicate_post_copy_attachments', 30, 2 ); } if ( intval( get_option( 'duplicate_post_copycomments' ) ) === 1 ) { add_action( 'dp_duplicate_post', 'duplicate_post_copy_comments', 40, 2 ); add_action( 'dp_duplicate_page', 'duplicate_post_copy_comments', 40, 2 ); } add_action( 'dp_duplicate_post', 'duplicate_post_copy_post_taxonomies', 50, 2 ); add_action( 'dp_duplicate_page', 'duplicate_post_copy_post_taxonomies', 50, 2 ); add_filter( 'plugin_row_meta', 'duplicate_post_add_plugin_links', 10, 2 ); } /** * Plugin upgrade. */ function duplicate_post_plugin_upgrade() { $installed_version = duplicate_post_get_installed_version(); if ( duplicate_post_get_current_version() === $installed_version ) { return; } if ( empty( $installed_version ) ) { // Get default roles. $default_roles = [ 'editor', 'administrator', 'wpseo_manager', 'wpseo_editor', ]; foreach ( $default_roles as $name ) { $role = get_role( $name ); if ( ! empty( $role ) ) { $role->add_cap( 'copy_posts' ); } } add_option( 'duplicate_post_show_notice', 1 ); } else { update_option( 'duplicate_post_show_notice', 0 ); } $show_links_in_defaults = [ 'row' => '1', 'adminbar' => '1', 'submitbox' => '1', 'bulkactions' => '1', ]; add_option( 'duplicate_post_copytitle', '1' ); add_option( 'duplicate_post_copydate', '0' ); add_option( 'duplicate_post_copystatus', '0' ); add_option( 'duplicate_post_copyslug', '0' ); add_option( 'duplicate_post_copyexcerpt', '1' ); add_option( 'duplicate_post_copycontent', '1' ); add_option( 'duplicate_post_copythumbnail', '1' ); add_option( 'duplicate_post_copytemplate', '1' ); add_option( 'duplicate_post_copyformat', '1' ); add_option( 'duplicate_post_copyauthor', '0' ); add_option( 'duplicate_post_copypassword', '0' ); add_option( 'duplicate_post_copyattachments', '0' ); add_option( 'duplicate_post_copychildren', '0' ); add_option( 'duplicate_post_copycomments', '0' ); add_option( 'duplicate_post_copymenuorder', '1' ); add_option( 'duplicate_post_taxonomies_blacklist', [] ); add_option( 'duplicate_post_blacklist', '' ); add_option( 'duplicate_post_types_enabled', [ 'post', 'page' ] ); add_option( 'duplicate_post_show_original_column', '0' ); add_option( 'duplicate_post_show_original_in_post_states', '0' ); add_option( 'duplicate_post_show_original_meta_box', '0' ); add_option( 'duplicate_post_show_link', [ 'new_draft' => '1', 'clone' => '1', 'rewrite_republish' => '1', ] ); add_option( 'duplicate_post_show_link_in', $show_links_in_defaults ); $taxonomies_blacklist = get_option( 'duplicate_post_taxonomies_blacklist' ); if ( $taxonomies_blacklist === '' ) { $taxonomies_blacklist = []; } if ( in_array( 'post_format', $taxonomies_blacklist, true ) ) { update_option( 'duplicate_post_copyformat', 0 ); $taxonomies_blacklist = array_diff( $taxonomies_blacklist, [ 'post_format' ] ); update_option( 'duplicate_post_taxonomies_blacklist', $taxonomies_blacklist ); } $meta_blacklist = explode( ',', get_option( 'duplicate_post_blacklist' ) ); if ( $meta_blacklist === '' ) { $meta_blacklist = []; } $meta_blacklist = array_map( 'trim', $meta_blacklist ); if ( in_array( '_wp_page_template', $meta_blacklist, true ) ) { update_option( 'duplicate_post_copytemplate', 0 ); $meta_blacklist = array_diff( $meta_blacklist, [ '_wp_page_template' ] ); } if ( in_array( '_thumbnail_id', $meta_blacklist, true ) ) { update_option( 'duplicate_post_copythumbnail', 0 ); $meta_blacklist = array_diff( $meta_blacklist, [ '_thumbnail_id' ] ); } update_option( 'duplicate_post_blacklist', implode( ',', $meta_blacklist ) ); if ( version_compare( $installed_version, '4.0.0' ) < 0 ) { // Migrate the 'Show links in' options to the new array-based structure. duplicate_post_migrate_show_links_in_options( $show_links_in_defaults ); } delete_site_option( 'duplicate_post_version' ); update_option( 'duplicate_post_version', duplicate_post_get_current_version() ); } /** * Runs the upgrade routine for version 4.0 to update the options in the database. * * @param array $defaults The default options to fall back on. * * @return void */ function duplicate_post_migrate_show_links_in_options( $defaults ) { $options_to_migrate = [ 'duplicate_post_show_row' => 'row', 'duplicate_post_show_adminbar' => 'adminbar', 'duplicate_post_show_submitbox' => 'submitbox', 'duplicate_post_show_bulkactions' => 'bulkactions', ]; $new_options = []; foreach ( $options_to_migrate as $old => $new ) { $new_options[ $new ] = get_option( $old, $defaults[ $new ] ); delete_option( $old ); } update_option( 'duplicate_post_show_link_in', $new_options ); } /** * Shows the welcome notice. * * @global string $wp_version The WordPress version string. */ function duplicate_post_show_update_notice() { if ( ! current_user_can( 'manage_options' ) ) { return; } $current_screen = get_current_screen(); if ( empty( $current_screen ) || empty( $current_screen->base ) || ( $current_screen->base !== 'dashboard' && $current_screen->base !== 'plugins' ) ) { return; } $title = sprintf( /* translators: %s: Yoast Duplicate Post. */ esc_html__( 'You\'ve successfully installed %s!', 'duplicate-post' ), 'Yoast Duplicate Post' ); $img_path = plugins_url( '/duplicate_post_yoast_icon-125x125.png', __FILE__ ); echo '<div id="duplicate-post-notice" class="notice is-dismissible" style="display: flex; align-items: flex-start;"> <img src="' . esc_url( $img_path ) . '" alt="" style="margin: 1em 1em 1em 0; width: 130px; align-self: center;"/> <div stle="margin: 0.5em"> <h1 style="font-size: 14px; color: #a4286a; font-weight: 600; margin-top: 8px;">' . $title . '</h1>' // phpcs:ignore WordPress.Security.EscapeOutput -- Reason: escaped properly above. . Newsletter::newsletter_signup_form() // phpcs:ignore WordPress.Security.EscapeOutput -- Reason: escaped in newsletter.php. . '</div> </div>'; echo "<script> function duplicate_post_dismiss_notice(){ var data = { 'action': 'duplicate_post_dismiss_notice', }; jQuery.post(ajaxurl, data, function(response) { jQuery('#duplicate-post-notice').hide(); }); } jQuery(document).ready(function(){ jQuery('body').on('click', '.notice-dismiss', function(){ duplicate_post_dismiss_notice(); }); }); </script>"; } /** * Dismisses the notice. * * @return bool */ function duplicate_post_dismiss_notice() { return update_site_option( 'duplicate_post_show_notice', 0 ); } /** * Copies the taxonomies of a post to another post. * * @global wpdb $wpdb WordPress database abstraction object. * * @param int $new_id New post ID. * @param WP_Post $post The original post object. */ function duplicate_post_copy_post_taxonomies( $new_id, $post ) { global $wpdb; if ( isset( $wpdb->terms ) ) { // Clear default category (added by wp_insert_post). wp_set_object_terms( $new_id, null, 'category' ); $post_taxonomies = get_object_taxonomies( $post->post_type ); // Several plugins just add support to post-formats but don't register post_format taxonomy. if ( post_type_supports( $post->post_type, 'post-formats' ) && ! in_array( 'post_format', $post_taxonomies, true ) ) { $post_taxonomies[] = 'post_format'; } $taxonomies_blacklist = get_option( 'duplicate_post_taxonomies_blacklist' ); if ( $taxonomies_blacklist === '' ) { $taxonomies_blacklist = []; } if ( intval( get_option( 'duplicate_post_copyformat' ) ) === 0 ) { $taxonomies_blacklist[] = 'post_format'; } /** * Filters the taxonomy excludelist when copying a post. * * @param array $taxonomies_blacklist The taxonomy excludelist from the options. * * @return array */ $taxonomies_blacklist = apply_filters( 'duplicate_post_taxonomies_excludelist_filter', $taxonomies_blacklist ); $taxonomies = array_diff( $post_taxonomies, $taxonomies_blacklist ); foreach ( $taxonomies as $taxonomy ) { $post_terms = wp_get_object_terms( $post->ID, $taxonomy, [ 'orderby' => 'term_order' ] ); $terms = []; $num_terms = count( $post_terms ); for ( $i = 0; $i < $num_terms; $i++ ) { $terms[] = $post_terms[ $i ]->slug; } wp_set_object_terms( $new_id, $terms, $taxonomy ); } } } /** * Copies the meta information of a post to another post * * @param int $new_id The new post ID. * @param WP_Post $post The original post object. */ function duplicate_post_copy_post_meta_info( $new_id, $post ) { $post_meta_keys = get_post_custom_keys( $post->ID ); if ( empty( $post_meta_keys ) ) { return; } $meta_blacklist = get_option( 'duplicate_post_blacklist' ); if ( $meta_blacklist === '' ) { $meta_blacklist = []; } else { $meta_blacklist = explode( ',', $meta_blacklist ); $meta_blacklist = array_filter( $meta_blacklist ); $meta_blacklist = array_map( 'trim', $meta_blacklist ); } $meta_blacklist[] = '_edit_lock'; // Edit lock. $meta_blacklist[] = '_edit_last'; // Edit lock. $meta_blacklist[] = '_dp_is_rewrite_republish_copy'; $meta_blacklist[] = '_dp_has_rewrite_republish_copy'; if ( intval( get_option( 'duplicate_post_copytemplate' ) ) === 0 ) { $meta_blacklist[] = '_wp_page_template'; } if ( intval( get_option( 'duplicate_post_copythumbnail' ) ) === 0 ) { $meta_blacklist[] = '_thumbnail_id'; } $meta_blacklist = apply_filters_deprecated( 'duplicate_post_blacklist_filter', [ $meta_blacklist ], '3.2.5', 'duplicate_post_excludelist_filter' ); /** * Filters the meta fields excludelist when copying a post. * * @param array $meta_blacklist The meta fields excludelist from the options. * * @return array */ $meta_blacklist = apply_filters( 'duplicate_post_excludelist_filter', $meta_blacklist ); $meta_blacklist_string = '(' . implode( ')|(', $meta_blacklist ) . ')'; if ( strpos( $meta_blacklist_string, '*' ) !== false ) { $meta_blacklist_string = str_replace( [ '*' ], [ '[a-zA-Z0-9_]*' ], $meta_blacklist_string ); $meta_keys = []; foreach ( $post_meta_keys as $meta_key ) { if ( ! preg_match( '#^' . $meta_blacklist_string . '$#', $meta_key ) ) { $meta_keys[] = $meta_key; } } } else { $meta_keys = array_diff( $post_meta_keys, $meta_blacklist ); } /** * Filters the list of meta fields names when copying a post. * * @param array $meta_keys The list of meta fields name, with the ones in the excludelist already removed. * * @return array */ $meta_keys = apply_filters( 'duplicate_post_meta_keys_filter', $meta_keys ); foreach ( $meta_keys as $meta_key ) { $meta_values = get_post_custom_values( $meta_key, $post->ID ); foreach ( $meta_values as $meta_value ) { $meta_value = maybe_unserialize( $meta_value ); add_post_meta( $new_id, $meta_key, duplicate_post_wp_slash( $meta_value ) ); } } } /** * Workaround for inconsistent wp_slash. * Works only with WP 4.4+ (map_deep) * * @param mixed $value Array or object to be recursively slashed. * @return string|mixed */ function duplicate_post_addslashes_deep( $value ) { if ( function_exists( 'map_deep' ) ) { return map_deep( $value, 'duplicate_post_addslashes_to_strings_only' ); } else { return wp_slash( $value ); } } /** * Adds slashes only to strings. * * @param mixed $value Value to slash only if string. * @return string|mixed */ function duplicate_post_addslashes_to_strings_only( $value ) { return Yoast\WP\Duplicate_Post\Utils::addslashes_to_strings_only( $value ); } /** * Replacement function for faulty core wp_slash(). * * @param mixed $value What to add slash to. * @return mixed */ function duplicate_post_wp_slash( $value ) { return duplicate_post_addslashes_deep( $value ); } /** * Copies attachments, including physical files. * * @param int $new_id The new post ID. * @param WP_Post $post The original post object. */ function duplicate_post_copy_attachments( $new_id, $post ) { // Get thumbnail ID. $old_thumbnail_id = get_post_thumbnail_id( $post->ID ); // Get children. $children = get_posts( [ 'post_type' => 'any', 'numberposts' => -1, 'post_status' => 'any', 'post_parent' => $post->ID, ] ); // Clone old attachments. foreach ( $children as $child ) { if ( $child->post_type !== 'attachment' ) { continue; } $url = wp_get_attachment_url( $child->ID ); // Let's copy the actual file. $tmp = download_url( $url ); if ( is_wp_error( $tmp ) ) { continue; } $desc = wp_slash( $child->post_content ); $file_array = []; $file_array['name'] = basename( $url ); $file_array['tmp_name'] = $tmp; // "Upload" to the media collection $new_attachment_id = media_handle_sideload( $file_array, $new_id, $desc ); if ( is_wp_error( $new_attachment_id ) ) { unlink( $file_array['tmp_name'] ); continue; } $new_post_author = wp_get_current_user(); $cloned_child = [ 'ID' => $new_attachment_id, 'post_title' => $child->post_title, 'post_exceprt' => $child->post_title, 'post_author' => $new_post_author->ID, ]; wp_update_post( wp_slash( $cloned_child ) ); $alt_title = get_post_meta( $child->ID, '_wp_attachment_image_alt', true ); if ( $alt_title ) { update_post_meta( $new_attachment_id, '_wp_attachment_image_alt', wp_slash( $alt_title ) ); } // If we have cloned the post thumbnail, set the copy as the thumbnail for the new post. if ( intval( get_option( 'duplicate_post_copythumbnail' ) ) === 1 && $old_thumbnail_id === $child->ID ) { set_post_thumbnail( $new_id, $new_attachment_id ); } } } /** * Copies child posts. * * @param int $new_id The new post ID. * @param WP_Post $post The original post object. * @param string $status Optional. The destination status. */ function duplicate_post_copy_children( $new_id, $post, $status = '' ) { // Get children. $children = get_posts( [ 'post_type' => 'any', 'numberposts' => -1, 'post_status' => 'any', 'post_parent' => $post->ID, ] ); foreach ( $children as $child ) { if ( $child->post_type === 'attachment' ) { continue; } duplicate_post_create_duplicate( $child, $status, $new_id ); } } /** * Copies comments. * * @param int $new_id The new post ID. * @param WP_Post $post The original post object. */ function duplicate_post_copy_comments( $new_id, $post ) { $comments = get_comments( [ 'post_id' => $post->ID, 'order' => 'ASC', 'orderby' => 'comment_date_gmt', ] ); $old_id_to_new = []; foreach ( $comments as $comment ) { // Do not copy pingbacks or trackbacks. if ( $comment->comment_type === 'pingback' || $comment->comment_type === 'trackback' ) { continue; } $parent = ( $comment->comment_parent && $old_id_to_new[ $comment->comment_parent ] ) ? $old_id_to_new[ $comment->comment_parent ] : 0; $commentdata = [ 'comment_post_ID' => $new_id, 'comment_author' => $comment->comment_author, 'comment_author_email' => $comment->comment_author_email, 'comment_author_url' => $comment->comment_author_url, 'comment_content' => $comment->comment_content, 'comment_type' => $comment->comment_type, 'comment_parent' => $parent, 'user_id' => $comment->user_id, 'comment_author_IP' => $comment->comment_author_IP, 'comment_agent' => $comment->comment_agent, 'comment_karma' => $comment->comment_karma, 'comment_approved' => $comment->comment_approved, ]; if ( intval( get_option( 'duplicate_post_copydate' ) ) === 1 ) { $commentdata['comment_date'] = $comment->comment_date; $commentdata['comment_date_gmt'] = get_gmt_from_date( $comment->comment_date ); } $new_comment_id = wp_insert_comment( $commentdata ); $commentmeta = get_comment_meta( $new_comment_id ); foreach ( $commentmeta as $meta_key => $meta_value ) { add_comment_meta( $new_comment_id, $meta_key, duplicate_post_wp_slash( $meta_value ) ); } $old_id_to_new[ $comment->comment_ID ] = $new_comment_id; } } /** * Creates a duplicate from a post. * * This is the main functions that does the cloning. * * @param WP_Post $post The original post object. * @param string $status Optional. The intended destination status. * @param string $parent_id Optional. The parent post ID if we are calling this recursively. * @return int|WP_Error */ function duplicate_post_create_duplicate( $post, $status = '', $parent_id = '' ) { /** * Fires before duplicating a post. * * @param WP_Post $post The original post object. * @param bool $status The intended destination status. * @param int $parent_id The parent post ID if we are calling this recursively. */ do_action( 'duplicate_post_pre_copy', $post, $status, $parent_id ); /** * Filter allowing to copy post. * * @param bool $can_duplicate Default to `true`. * @param WP_Post $post The original post object. * @param bool $status The intended destination status. * @param int $parent_id The parent post ID if we are calling this recursively. * * @return bool */ $can_duplicate = apply_filters( 'duplicate_post_allow', true, $post, $status, $parent_id ); if ( ! $can_duplicate ) { wp_die( esc_html( __( 'You aren\'t allowed to duplicate this post', 'duplicate-post' ) ) ); } if ( ! duplicate_post_is_post_type_enabled( $post->post_type ) && $post->post_type !== 'attachment' ) { wp_die( esc_html( __( 'Copy features for this post type are not enabled in options page', 'duplicate-post' ) . ': ' . $post->post_type ) ); } $new_post_status = ( empty( $status ) ) ? $post->post_status : $status; $title = ' '; if ( $post->post_type !== 'attachment' ) { $prefix = sanitize_text_field( get_option( 'duplicate_post_title_prefix' ) ); $suffix = sanitize_text_field( get_option( 'duplicate_post_title_suffix' ) ); if ( intval( get_option( 'duplicate_post_copytitle' ) ) === 1 ) { $title = $post->post_title; if ( ! empty( $prefix ) ) { $prefix .= ' '; } if ( ! empty( $suffix ) ) { $suffix = ' ' . $suffix; } } else { $title = ' '; } $title = trim( $prefix . $title . $suffix ); /* * Not sure we should force a title. Instead, we should respect what WP does. * if ( '' === $title ) { * // empty title. * $title = __( 'Untitled', 'default' ); * } */ if ( intval( get_option( 'duplicate_post_copystatus' ) ) === 0 ) { $new_post_status = 'draft'; } elseif ( $new_post_status === 'publish' || $new_post_status === 'future' ) { // Check if the user has the right capability. if ( is_post_type_hierarchical( $post->post_type ) ) { if ( ! current_user_can( 'publish_pages' ) ) { $new_post_status = 'pending'; } } elseif ( ! current_user_can( 'publish_posts' ) ) { $new_post_status = 'pending'; } } } $new_post_author = wp_get_current_user(); $new_post_author_id = $new_post_author->ID; if ( intval( get_option( 'duplicate_post_copyauthor' ) ) === 1 ) { // Check if the user has the right capability. if ( is_post_type_hierarchical( $post->post_type ) ) { if ( current_user_can( 'edit_others_pages' ) ) { $new_post_author_id = $post->post_author; } } elseif ( current_user_can( 'edit_others_posts' ) ) { $new_post_author_id = $post->post_author; } } $menu_order = ( intval( get_option( 'duplicate_post_copymenuorder' ) ) === 1 ) ? $post->menu_order : 0; $increase_menu_order_by = get_option( 'duplicate_post_increase_menu_order_by' ); if ( ! empty( $increase_menu_order_by ) && is_numeric( $increase_menu_order_by ) ) { $menu_order += intval( $increase_menu_order_by ); } $post_name = $post->post_name; if ( intval( get_option( 'duplicate_post_copyslug' ) ) !== 1 ) { $post_name = ''; } $new_post_parent = empty( $parent_id ) ? $post->post_parent : $parent_id; $new_post = [ 'menu_order' => $menu_order, 'comment_status' => $post->comment_status, 'ping_status' => $post->ping_status, 'post_author' => $new_post_author_id, 'post_content' => ( intval( get_option( 'duplicate_post_copycontent' ) ) === 1 ) ? $post->post_content : '', 'post_content_filtered' => ( intval( get_option( 'duplicate_post_copycontent' ) ) === 1 ) ? $post->post_content_filtered : '', 'post_excerpt' => ( intval( get_option( 'duplicate_post_copyexcerpt' ) ) === 1 ) ? $post->post_excerpt : '', 'post_mime_type' => $post->post_mime_type, 'post_parent' => $new_post_parent, 'post_password' => ( intval( get_option( 'duplicate_post_copypassword' ) ) === 1 ) ? $post->post_password : '', 'post_status' => $new_post_status, 'post_title' => $title, 'post_type' => $post->post_type, 'post_name' => $post_name, ]; if ( intval( get_option( 'duplicate_post_copydate' ) ) === 1 ) { $new_post_date = $post->post_date; $new_post['post_date'] = $new_post_date; $new_post['post_date_gmt'] = get_gmt_from_date( $new_post_date ); } /** * Filter new post values. * * @param array $new_post New post values. * @param WP_Post $post Original post object. * * @return array */ $new_post = apply_filters( 'duplicate_post_new_post', $new_post, $post ); $new_post_id = wp_insert_post( wp_slash( $new_post ), true ); // If you have written a plugin which uses non-WP database tables to save // information about a post you can hook this action to dupe that data. if ( $new_post_id !== 0 && ! is_wp_error( $new_post_id ) ) { if ( $post->post_type === 'page' || is_post_type_hierarchical( $post->post_type ) ) { do_action( 'dp_duplicate_page', $new_post_id, $post, $status ); } else { do_action( 'dp_duplicate_post', $new_post_id, $post, $status ); } delete_post_meta( $new_post_id, '_dp_original' ); add_post_meta( $new_post_id, '_dp_original', $post->ID ); } /** * Fires after duplicating a post. * * @param int|WP_Error $new_post_id The new post id or WP_Error object on error. * @param WP_Post $post The original post object. * @param bool $status The intended destination status. * @param int $parent_id The parent post ID if we are calling this recursively. */ do_action( 'duplicate_post_post_copy', $new_post_id, $post, $status, $parent_id ); return $new_post_id; } /** * Adds some links on the plugin page. * * @param array $links The links array. * @param string $file The file name. * @return array */ function duplicate_post_add_plugin_links( $links, $file ) { if ( plugin_basename( __DIR__ . '/duplicate-post.php' ) === $file ) { $links[] = '<a href="https://yoast.com/wordpress/plugins/duplicate-post">' . esc_html__( 'Documentation', 'duplicate-post' ) . '</a>'; } return $links; }