betterdocs / includes / Admin / XMLExporter.php

XMLExporter.php in BetterDocs – AI Documentation, Knowledge Base, MCP Server, Docs, Wikis, FAQ & Chatbot 4.8.1, at includes/Admin/XMLExporter.php

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1	<?php
2	// phpcs:disable WordPress.NamingConventions.PrefixAllGlobals.NonPrefixedHooknameFound -- inherited WordPress WXR exporter hook contract (wxr_export_, the__export, rss2_head) preserved for compatibility with WP/feed consumers.
3	namespace WPDeveloper\BetterDocs\Admin;
4
5	use WPDeveloper\BetterDocs\Admin\ExportDefaults;
6	use WPDeveloper\BetterDocs\Admin\WPExporter;
7
8	use WP_Post;
9	use WP_Term;
10	use wpdb;
11
12
13	if ( ! defined( 'ABSPATH' ) ) {
14	exit; // Exit if accessed directly.
15	}
16
17	/*
18	* Originally made by WordPress.
19	*
20	* What changed (by Elementor):
21	* Remove echos.
22	* Fix indents.
23	* Add methods
24	* indent.
25	* wxr_categories_list.
26	* wxr_tags_list.
27	* wxr_terms_list.
28	* wxr_posts_list.
29	*
30	* What changed (by Templately)
31	* Added post__in capabilities for query.
32	* nav_menu_item from terms
33	* Some indent, and data type fixes
34	* query_args added as default args
35	*/
36
37	#[\AllowDynamicProperties]
38	class XMLExporter {
39	const WXR_VERSION = '1.2';
40
41	/**
42	* @var array
43	*/
44	private $args;
45
46	/**
47	* @var wpdb
48	*/
49	private $wpdb;
50
51	private $terms;
52
53	private $nav_menu_terms;
54
55	private $wpexporter;
56
57	public function __construct( array $args = [] ) {
58	global $wpdb;
59
60	$this->args = wp_parse_args($args, ExportDefaults::get_default_args());
61
62	$this->wpexporter = new WPExporter($this->args);
63
64	$this->wpdb = $wpdb;
65	}
66
67	public function run(): array {
68	// Handle glossaries export (as taxonomy)
69	if ('glossaries' === $this->args['content']) {
70	return $this->handle_glossaries_export();
71	}
72
73	return [
74	'success' => true,
75	'data' => [
76	'filename' => 'betterdocs.' . gmdate( 'Y-m-d' ) . '.xml',
77	'filetype' => 'text/xml',
78	'download' => $this->get_xml_export($this->wpexporter->exporter_ids()),
79	]
80	];
81	}
82
83	public function handle_glossaries_export(): array {
84	$filename = 'betterdocs.' . gmdate( 'Y-m-d' ) . '.xml';
85	return [
86	'success' => true,
87	'data' => [
88	'filename' => $filename,
89	'filetype' => 'text/xml',
90	'download' => $this->get_xml_export( $this->wpexporter->get_glossary_term_ids() ),
91	]
92	];
93	}
94
95	/**
96	* Return tabulation characters, by `$columns`.
97	*
98	* @param int $columns
99	*
100	* @return string
101	*/
102	private function indent( int $columns = 1 ): string {
103
104	$output = str_repeat( "\t", $columns );
105
106	return (string) $output;
107	}
108
109	/**
110	* Return wrapped given string in XML CDATA tag.
111	*
112	* @param string $str String to wrap in XML CDATA tag.
113	*
114	* @return string
115	*/
116	private function wxr_cdata( $str ): string {
117	$str = (string) $str;
118
119	// wp_is_valid_utf8() only exists on WP 6.9+. Call it via a variable (still
120	// guarded by function_exists) so Plugin Check's static "requires WP"
121	// analysis doesn't flag a function that is never invoked on older cores;
122	// on those, fall back to mb_check_encoding().
123	$utf8_validator = 'wp_is_valid_utf8';
124	$is_utf8 = function_exists( $utf8_validator )
125	? $utf8_validator( $str )
126	: ( function_exists( 'mb_check_encoding' ) ? mb_check_encoding( $str, 'UTF-8' ) : true );
127
128	if ( ! $is_utf8 ) {
129	$str = mb_convert_encoding( $str, 'UTF-8', 'ISO-8859-1' );
130	}
131
132	$str = '<![CDATA[' . str_replace( ']]>', ']]]]><![CDATA[>', $str ) . ']]>';
133
134	return $str;
135	}
136
137	/**
138	* Return the URL of the site.
139	*
140	* @return string Site URL.
141	*/
142	private function wxr_site_url(): string {
143	if ( is_multisite() ) {
144	// Multisite: the base URL.
145	return network_home_url();
146	} else {
147	// WordPress (single site): the blog URL.
148	return get_bloginfo_rss( 'url' );
149	}
150	}
151
152	/**
153	* Return a cat_name XML tag from a given category object.
154	*
155	* @param WP_Term $category Category Object
156	*
157	* @return string
158	*/
159	private function wxr_cat_name( $category ): string {
160	if ( empty( $category->name ) ) {
161	return '';
162	}
163
164	return $this->indent( 3 ) . '<wp:cat_name>' . $this->wxr_cdata( $category->name ) . '</wp:cat_name>' . PHP_EOL;
165	}
166
167	/**
168	* Return a category_description XML tag from a given category object.
169	*
170	* @param WP_Term $category Category Object
171	*
172	* @return string
173	*/
174	private function wxr_category_description( $category ): string {
175	if ( empty( $category->description ) ) {
176	return '';
177	}
178
179	return $this->indent( 3 ) . '<wp:category_description>' . $this->wxr_cdata( $category->description ) . "</wp:category_description>\n";
180	}
181
182	/**
183	* Return a tag_name XML tag from a given tag object.
184	*
185	* @param WP_Term $tag Tag Object
186	*
187	* @return string
188	*/
189	private function wxr_tag_name( $tag ): string {
190	if ( empty( $tag->name ) ) {
191	return '';
192	}
193
194	return $this->indent( 3 ) . '<wp:tag_name>' . $this->wxr_cdata( $tag->name ) . '</wp:tag_name>' . PHP_EOL;
195	}
196
197	/**
198	* Return a tag_description XML tag from a given tag object.
199	*
200	* @param WP_Term $tag Tag Object
201	*
202	* @return string
203	*/
204	private function wxr_tag_description( $tag ): string {
205	if ( empty( $tag->description ) ) {
206	return '';
207	}
208
209	return $this->indent( 3 ) . '<wp:tag_description>' . $this->wxr_cdata( $tag->description ) . '</wp:tag_description>' . PHP_EOL;
210	}
211
212	/**
213	* Return a term_name XML tag from a given term object.
214	*
215	* @param WP_Term $term Term Object
216	*
217	* @return string
218	*/
219	private function wxr_term_name( $term ): string {
220	if ( empty( $term->name ) ) {
221	return '';
222	}
223
224	return $this->indent( 3 ) . '<wp:term_name>' . $this->wxr_cdata( $term->name ) . '</wp:term_name>' . PHP_EOL;
225	}
226
227	/**
228	* Return a term_description XML tag from a given term object.
229	*
230	* @param WP_Term $term Term Object
231	*
232	* @return string
233	*/
234	private function wxr_term_description( $term ): string {
235	if ( empty( $term->description ) ) {
236	return '';
237	}
238
239	return $this->indent( 3 ) . '<wp:term_description>' . $this->wxr_cdata( $term->description ) . '</wp:term_description>' . PHP_EOL;
240	}
241
242	/**
243	* Return term meta XML tags for a given term object.
244	*
245	* @param WP_Term $term Term object.
246	*
247	* @return string
248	*/
249	private function wxr_term_meta( $term ): string {
250	$result = '';
251	$termmeta = $this->wpdb->get_results( $this->wpdb->prepare( "SELECT * FROM {$this->wpdb->termmeta} WHERE term_id = %d", $term->term_id ) );// phpcs:ignore
252
253	foreach ( $termmeta as $meta ) {
254	/**
255	* Filters whether to selectively skip term meta used for WXR exports.
256	*
257	* Returning a truthy value from the filter will skip the current meta
258	* object from being exported.
259	*
260	* @param bool $skip Whether to skip the current piece of term meta. Default false.
261	* @param string $meta_key Current meta key.
262	* @param object $meta Current meta object.
263	*
264	* @since 4.6.0
265	*
266	*/
267	if ( ! apply_filters( 'wxr_export_skip_termmeta', false, $meta->meta_key, $meta ) ) {
268	$result .= sprintf( $this->indent( 3 ) . "<wp:termmeta>\n\t\t\t<wp:meta_key>%s</wp:meta_key>\n\t\t\t<wp:meta_value>%s</wp:meta_value>\n\t\t</wp:termmeta>\n", $this->wxr_cdata( $meta->meta_key ), $this->wxr_cdata( $meta->meta_value ) );
269	}
270	}
271
272	return $result;
273	}
274
275	/**
276	* Return list of authors with posts.
277	*
278	* @param int[] $post_ids Optional. Array of post IDs to filter the query by.
279	*
280	* @return string
281	*/
282	private function wxr_authors_list( ?array $post_ids = null ): string {
283	$result = '';
284
285	if ( ! empty( $post_ids ) ) {
286	$post_ids = array_map( 'absint', $post_ids );
287	$and = 'AND ID IN ( ' . implode( ', ', $post_ids ) . ')';
288	} else {
289	$and = '';
290	}
291
292	$authors = [];
293	$results = $this->wpdb->get_results( "SELECT DISTINCT post_author FROM {$this->wpdb->posts} WHERE post_status != 'auto-draft' $and" );// phpcs:ignore
294	foreach ( (array) $results as $r ) {
295	$authors[] = get_userdata( $r->post_author );
296	}
297
298	$authors = array_filter( $authors );
299
300	foreach ( $authors as $author ) {
301	$result .= $this->indent( 2 ) . '<wp:author>' . PHP_EOL;
302
303	$result .= $this->indent( 3 ) . '<wp:author_id>' . (int) $author->ID . '</wp:author_id>' . PHP_EOL;
304	$result .= $this->indent( 3 ) . '<wp:author_login>' . $this->wxr_cdata( $author->user_login ) . '</wp:author_login>' . PHP_EOL;
305	$result .= $this->indent( 3 ) . '<wp:author_email>' . $this->wxr_cdata( $author->user_email ) . '</wp:author_email>' . PHP_EOL;
306	$result .= $this->indent( 3 ) . '<wp:author_display_name>' . $this->wxr_cdata( $author->display_name ) . '</wp:author_display_name>' . PHP_EOL;
307	$result .= $this->indent( 3 ) . '<wp:author_first_name>' . $this->wxr_cdata( $author->first_name ) . '</wp:author_first_name>' . PHP_EOL;
308	$result .= $this->indent( 3 ) . '<wp:author_last_name>' . $this->wxr_cdata( $author->last_name ) . '</wp:author_last_name>' . PHP_EOL;
309
310	$result .= $this->indent( 2 ) . '</wp:author>' . PHP_EOL;
311	}
312
313	return $result;
314	}
315
316	/**
317	* Return list of categories.
318	*
319	* @param array $cats
320	*
321	* @return string
322	*/
323	private function wxr_categories_list( array $cats ): string {
324	$result = '';
325
326	foreach ( $cats as $c ) {
327	$result .= $this->indent( 2 ) . '<wp:category>' . PHP_EOL;
328
329	$result .= $this->indent( 3 ) . '<wp:term_id>' . (int) $c->term_id . '</wp:term_id>' . PHP_EOL;
330	$result .= $this->indent( 3 ) . '<wp:category_nicename>' . $this->wxr_cdata( $c->slug ) . '</wp:category_nicename>' . PHP_EOL;
331	$result .= $this->indent( 3 ) . '<wp:category_parent>' . $this->wxr_cdata( $c->parent ? $cats[ $c->parent ]->slug : '' ) . '</wp:category_parent>' . PHP_EOL;
332	$result .= $this->wxr_cat_name( $c ) . $this->wxr_category_description( $c ) . $this->wxr_term_meta( $c );
333
334	$result .= $this->indent( 2 ) . '</wp:category>' . PHP_EOL;
335	}
336
337	return $result;
338	}
339
340	/**
341	* Return list of tags.
342	*
343	* @param array $tags
344	*
345	* @return string
346	*/
347	private function wxr_tags_list( array $tags ): string {
348	$result = '';
349
350	foreach ( $tags as $t ) {
351	$result .= $this->indent( 2 ) . '<wp:tag>' . PHP_EOL;
352
353	$result .= $this->indent( 3 ) . '<wp:term_id>' . (int) $t->term_id . '</wp:term_id>' . PHP_EOL;
354	$result .= $this->indent( 3 ) . '<wp:tag_slug>' . $this->wxr_cdata( $t->slug ) . '</wp:tag_slug>' . PHP_EOL;
355	$result .= $this->wxr_tag_name( $t ) . $this->wxr_tag_description( $t ) . $this->wxr_term_meta( $t );
356
357	$result .= $this->indent( 2 ) . '</wp:tag>' . PHP_EOL;
358	}
359
360	return $result;
361	}
362
363	public function get_parent_terms_slug( $terms, $term_id ) {
364	$key = array_search( $term_id, array_column( $terms, 'term_id' ));
365
366	if ( $key !== false ) {
367	return $terms[$key]->slug;
368	}
369
370	return null;
371	}
372
373	/**
374	* Return list of terms.
375	*
376	* @param array $terms
377	*
378	* @return string
379	*/
380	private function wxr_terms_list( array $terms ): string {
381	$result = '';
382	foreach ( $terms as $key => $t ) {
383	$result .= $this->indent( 2 ) . '<wp:term>' . PHP_EOL;
384
385	$result .= $this->indent( 3 ) . '<wp:term_id>' . $this->wxr_cdata( $t->term_id ) . '</wp:term_id>' . PHP_EOL;
386	$result .= $this->indent( 3 ) . '<wp:term_taxonomy>' . $this->wxr_cdata( $t->taxonomy ) . '</wp:term_taxonomy>' . PHP_EOL;
387	$result .= $this->indent( 3 ) . '<wp:term_slug>' . $this->wxr_cdata( $t->slug ) . '</wp:term_slug>' . PHP_EOL;
388	if ( $t->parent ) {
389	$result .= $this->indent( 3 ) . '<wp:term_parent>' . $this->wxr_cdata( $this->get_parent_terms_slug( $terms, $t->parent ) ) . '</wp:term_parent>' . PHP_EOL;
390	}
391	$result .= $this->wxr_term_name( $t ) . $this->wxr_term_description( $t ) . $this->wxr_term_meta( $t );
392
393	$result .= $this->indent( 2 ) . '</wp:term>' . PHP_EOL;
394	}
395
396	return $result;
397	}
398
399	// public function get_terms( array $post_ids ) {
400	// // Get the object taxonomies
401	// $taxonomies = get_object_taxonomies( $this->args['content'] );
402
403	// if ( isset( $this->args['selected_docs'] ) && ! empty ( $this->args['selected_docs'] ) && $this->args['selected_docs'][0] == 'all' ) {
404	// $terms = get_terms( [
405	// 'taxonomy' => $taxonomies,
406	// 'hide_empty' => false,
407	// ] );
408	// } else if( $this->args['content'] == 'glossaries' ) {
409	// $terms = get_terms([
410	// 'taxonomy' => 'glossaries',
411	// 'include' => $post_ids,
412	// 'hide_empty' => false,
413	// ]);
414	// } else {
415	// $terms = wp_get_object_terms( $post_ids, $taxonomies);
416	// }
417
418	// usort( $terms, array( $this, 'compare_terms_by_meta' ) );
419
420	// return $terms;
421	// }
422
423	/**
424	* Return list of posts, by requested `$post_ids`.
425	*
426	* @param array $post_ids
427	*
428	* @return string
429	*/
430	private function wxr_posts_list( array $post_ids ): string {
431	$result = '';
432
433	if ( $post_ids ) {
434	global $wp_query;
435
436	// Fake being in the loop.
437	$wp_query->in_the_loop = true;
438
439	// Fetch 20 posts at a time rather than loading the entire table into memory.
440	while ( $next_posts = array_splice( $post_ids, 0, 20 ) ) {
441	$where = 'WHERE ID IN (' . implode( ',', $next_posts ) . ')';
442	$posts = $this->wpdb->get_results( "SELECT * FROM {$this->wpdb->posts} $where" );// phpcs:ignore
443
444	// Begin Loop.
445	foreach ( $posts as $post ) {
446	setup_postdata( $post );
447
448	$title = apply_filters( 'the_title_rss', $post->post_title );
449
450	/**
451	* Filters the post content used for WXR exports.
452	*
453	* @param string $post_content Content of the current post.
454	*
455	* @since 2.5.0
456	*
457	*/
458	$content = $this->wxr_cdata( apply_filters( 'the_content_export', $post->post_content ) );
459
460	/**
461	* Filters the post excerpt used for WXR exports.
462	*
463	* @param string $post_excerpt Excerpt for the current post.
464	*
465	* @since 2.6.0
466	*
467	*/
468	$excerpt = $this->wxr_cdata( apply_filters( 'the_excerpt_export', $post->post_excerpt ) );
469
470	$result .= $this->indent( 2 ) . '<item>' . PHP_EOL;
471
472	$result .= $this->indent( 3 ) . '<title>' . $title . '</title>' . PHP_EOL;
473	$result .= $this->indent( 3 ) . '<link>' . esc_url( get_permalink() ) . '</link>' . PHP_EOL;
474	$result .= $this->indent( 3 ) . '<pubDate>' . mysql2date( 'D, d M Y H:i:s +0000', get_post_time( 'Y-m-d H:i:s', true ), false ) . '</pubDate>' . PHP_EOL;
475	$result .= $this->indent( 3 ) . '<dc:creator>' . $this->wxr_cdata( get_the_author_meta( 'login' ) ) . '</dc:creator>' . PHP_EOL;
476	$result .= $this->indent( 3 ) . '<guid isPermaLink="false">' . $this->wxr_cdata( get_the_author_meta( 'login' ) ) . '</guid>' . PHP_EOL;
477	$result .= $this->indent( 3 ) . '<description></description>' . PHP_EOL;
478	$result .= $this->indent( 3 ) . '<content:encoded>' . $content . '</content:encoded>' . PHP_EOL;
479	$result .= $this->indent( 3 ) . '<excerpt:encoded>' . $excerpt . '</excerpt:encoded>' . PHP_EOL;
480	$result .= $this->indent( 3 ) . '<wp:post_id>' . (int) $post->ID . '</wp:post_id>' . PHP_EOL;
481	$result .= $this->indent( 3 ) . '<wp:post_date>' . $this->wxr_cdata( $post->post_date ) . '</wp:post_date>' . PHP_EOL;
482	$result .= $this->indent( 3 ) . '<wp:post_date_gmt>' . $this->wxr_cdata( $post->post_date_gmt ) . '</wp:post_date_gmt>' . PHP_EOL;
483	$result .= $this->indent( 3 ) . '<wp:comment_status>' . $this->wxr_cdata( $post->comment_status ) . '</wp:comment_status>' . PHP_EOL;
484	$result .= $this->indent( 3 ) . '<wp:ping_status>' . $this->wxr_cdata( $post->ping_status ) . '</wp:ping_status>' . PHP_EOL;
485	$result .= $this->indent( 3 ) . '<wp:post_name>' . $this->wxr_cdata( $post->post_name ) . '</wp:post_name>' . PHP_EOL;
486	$result .= $this->indent( 3 ) . '<wp:status>' . $this->wxr_cdata( $post->post_status ) . '</wp:status>' . PHP_EOL;
487	$result .= $this->indent( 3 ) . '<wp:post_parent>' . $this->wxr_cdata( $post->post_parent ) . '</wp:post_parent>' . PHP_EOL;
488	$result .= $this->indent( 3 ) . '<wp:menu_order>' . (int) $post->menu_order . '</wp:menu_order>' . PHP_EOL;
489	$result .= $this->indent( 3 ) . '<wp:post_type>' . $this->wxr_cdata( $post->post_type ) . '</wp:post_type>' . PHP_EOL;
490	$result .= $this->indent( 3 ) . '<wp:post_password>' . $this->wxr_cdata( $post->post_password ) . '</wp:post_password>' . PHP_EOL;
491	$result .= $this->indent( 3 ) . '<wp:is_sticky>' . ( is_sticky( $post->ID ) ? 1 : 0 ) . '</wp:is_sticky>' . PHP_EOL;
492
493	if ( 'attachment' === $post->post_type ) {
494	$result .= $this->indent( 3 ) . '<wp:attachment_url>' . $this->wxr_cdata( wp_get_attachment_url( $post->ID ) ) . '</wp:attachment_url>' . PHP_EOL;
495	}
496
497	$result .= $this->wxr_post_taxonomy( $post );
498
499	$postmeta = $this->wpdb->get_results( $this->wpdb->prepare( "SELECT * FROM {$this->wpdb->postmeta} WHERE post_id = %d", $post->ID ) );// phpcs:ignore
500	foreach ( $postmeta as $meta ) {
501	/**
502	* Filters whether to selectively skip post meta used for WXR exports.
503	*
504	* Returning a truthy value from the filter will skip the current meta
505	* object from being exported.
506	*
507	* @param bool $skip Whether to skip the current post meta. Default false.
508	* @param string $meta_key Current meta key.
509	* @param object $meta Current meta object.
510	*
511	* @since 3.3.0
512	*
513	*/
514	if ( apply_filters( 'wxr_export_skip_postmeta', false, $meta->meta_key, $meta ) ) {
515	continue;
516	}
517
518	$result .= $this->indent( 3 ) . '<wp:postmeta>' . PHP_EOL;
519
520	$result .= $this->indent( 4 ) . '<wp:meta_key>' . $this->wxr_cdata( $meta->meta_key ) . '</wp:meta_key>' . PHP_EOL;
521	$result .= $this->indent( 4 ) . '<wp:meta_value>' . $this->wxr_cdata( $meta->meta_value ) . '</wp:meta_value>' . PHP_EOL;
522
523	$result .= $this->indent( 3 ) . '</wp:postmeta>' . PHP_EOL;
524	}
525
526	$wpml_meta = WPMLSupport::get_post_language_meta( (int) $post->ID );
527	if ( $wpml_meta !== null ) {
528	$result .= $this->indent( 3 ) . '<wp:postmeta>' . PHP_EOL;
529	$result .= $this->indent( 4 ) . '<wp:meta_key>' . $this->wxr_cdata( WPMLSupport::META_LANG ) . '</wp:meta_key>' . PHP_EOL;
530	$result .= $this->indent( 4 ) . '<wp:meta_value>' . $this->wxr_cdata( $wpml_meta['language_code'] ) . '</wp:meta_value>' . PHP_EOL;
531	$result .= $this->indent( 3 ) . '</wp:postmeta>' . PHP_EOL;
532
533	if ( $wpml_meta['source_slug'] !== '' ) {
534	$result .= $this->indent( 3 ) . '<wp:postmeta>' . PHP_EOL;
535	$result .= $this->indent( 4 ) . '<wp:meta_key>' . $this->wxr_cdata( WPMLSupport::META_SOURCE_SLUG ) . '</wp:meta_key>' . PHP_EOL;
536	$result .= $this->indent( 4 ) . '<wp:meta_value>' . $this->wxr_cdata( $wpml_meta['source_slug'] ) . '</wp:meta_value>' . PHP_EOL;
537	$result .= $this->indent( 3 ) . '</wp:postmeta>' . PHP_EOL;
538	}
539	}
540
541	$_comments = $this->wpdb->get_results( $this->wpdb->prepare( "SELECT * FROM {$this->wpdb->comments} WHERE comment_post_ID = %d AND comment_approved <> 'spam'", $post->ID ) );// phpcs:ignore
542	$comments = array_map( 'get_comment', $_comments );
543	foreach ( $comments as $c ) {
544
545	$result .= $this->indent( 3 ) . '<wp:comment>' . PHP_EOL;
546
547	$result .= $this->indent( 4 ) . '<wp:comment_id>' . (int) $c->comment_ID . '</wp:comment_id>' . PHP_EOL;
548	$result .= $this->indent( 4 ) . '<wp:comment_author>' . $this->wxr_cdata( $c->comment_author ) . '</wp:comment_author>' . PHP_EOL;
549	$result .= $this->indent( 4 ) . '<wp:comment_author_email>' . $this->wxr_cdata( $c->comment_author_email ) . '</wp:comment_author_email>' . PHP_EOL;
550	$result .= $this->indent( 4 ) . '<wp:comment_author_url>' . $this->wxr_cdata( $c->comment_author_url ) . '</wp:comment_author_url>' . PHP_EOL;
551	$result .= $this->indent( 4 ) . '<wp:comment_author_IP>' . $this->wxr_cdata( $c->comment_author_IP ) . '</wp:comment_author_IP>' . PHP_EOL;
552	$result .= $this->indent( 4 ) . '<wp:comment_date>' . $this->wxr_cdata( $c->comment_date ) . '</wp:comment_date>' . PHP_EOL;
553	$result .= $this->indent( 4 ) . '<wp:comment_date_gmt>' . $this->wxr_cdata( $c->comment_date_gmt ) . '</wp:comment_date_gmt>' . PHP_EOL;
554	$result .= $this->indent( 4 ) . '<wp:comment_content>' . $this->wxr_cdata( $c->comment_content ) . '</wp:comment_content>' . PHP_EOL;
555	$result .= $this->indent( 4 ) . '<wp:comment_approved>' . $this->wxr_cdata( $c->comment_approved ) . '</wp:comment_approved>' . PHP_EOL;
556	$result .= $this->indent( 4 ) . '<wp:comment_type>' . $this->wxr_cdata( $c->comment_type ) . '</wp:comment_type>' . PHP_EOL;
557	$result .= $this->indent( 4 ) . '<wp:comment_parent>' . $this->wxr_cdata( $c->comment_parent ) . '</wp:comment_parent>' . PHP_EOL;
558	$result .= $this->indent( 4 ) . '<wp:comment_user_id>' . (int) $c->user_id . '</wp:comment_user_id>' . PHP_EOL;
559
560	$c_meta = $this->wpdb->get_results( $this->wpdb->prepare( "SELECT * FROM {$this->wpdb->commentmeta} WHERE comment_id = %d", $c->comment_ID ) );// phpcs:ignore
561	foreach ( $c_meta as $meta ) {
562	/**
563	* Filters whether to selectively skip comment meta used for WXR exports.
564	*
565	* Returning a truthy value from the filter will skip the current meta
566	* object from being exported.
567	*
568	* @param bool $skip Whether to skip the current comment meta. Default false.
569	* @param string $meta_key Current meta key.
570	* @param object $meta Current meta object.
571	*
572	* @since 4.0.0
573	*
574	*/
575	if ( apply_filters( 'wxr_export_skip_commentmeta', false, $meta->meta_key, $meta ) ) {
576	continue;
577	}
578
579	$result .= $this->indent( 4 ) . '<wp:commentmeta>' . PHP_EOL;
580
581	$result .= $this->indent( 5 ) . '<wp:meta_key>' . $this->wxr_cdata( $meta->meta_key ) . '</wp:meta_key>' . PHP_EOL;
582	$result .= $this->indent( 5 ) . '<wp:meta_value>' . $this->wxr_cdata( $meta->meta_key ) . '</wp:meta_value>' . PHP_EOL;
583
584	$result .= $this->indent( 4 ) . '</wp:commentmeta>' . PHP_EOL;
585	}
586
587	$result .= $this->indent( 3 ) . '</wp:comment>' . PHP_EOL;
588	}
589
590	$result .= $this->indent( 2 ) . '</item>' . PHP_EOL;
591	}
592	}
593	}
594
595	return $result;
596	}
597
598	/**
599	* Return list of taxonomy terms, in XML tag format, associated with a post
600	*
601	* @param object $post
602	*
603	* @return string
604	*/
605	private function wxr_post_taxonomy( $post ): string {
606	$result = '';
607
608	$taxonomies = get_object_taxonomies( $post->post_type );
609
610	if ( empty( $taxonomies ) ) {
611	return $result;
612	}
613
614	$terms = wp_get_object_terms( $post->ID, $taxonomies );
615
616	foreach ( (array) $terms as $term ) {
617	$result .= $this->indent( 3 ) . "<category domain=\"{$term->taxonomy}\" nicename=\"{$term->slug}\">" . $this->wxr_cdata( $term->name ) . '</category>' . PHP_EOL;
618	}
619
620	return $result;
621	}
622
623	/**
624	* Get the XML export.
625	*
626	* @param array $post_ids
627	*
628	* @return string
629	*/
630	private function get_xml_export( array $post_ids ): string {
631	$charset = get_bloginfo( 'charset' );
632	$generator = get_the_generator( 'export' );
633	$wxr_version = self::WXR_VERSION;
634	$wxr_site_url = $this->wxr_site_url();
635	$rss_info_name = get_bloginfo_rss( 'name' );
636	$rss_info_url = get_bloginfo_rss( 'url' );
637	$rss_info_description = get_bloginfo_rss( 'description' );
638	$rss_info_language = get_bloginfo_rss( 'language' );
639	$pub_date = gmdate( 'D, d M Y H:i:s +0000' );
640
641	$dynamic = $this->wxr_authors_list( $post_ids );
642
643	ob_start();
644	/** This action is documented in wp-includes/feed-rss2.php */
645	do_action( 'rss2_head' );
646	$rss2_head = ob_get_clean();
647
648	$dynamic .= $rss2_head;
649
650	$dynamic .= $this->wxr_terms_list( $this->wpexporter->get_terms( $post_ids ) );
651	$dynamic .= $this->wxr_posts_list( $post_ids );
652
653	$result = '<?xml version="1.0" encoding="' . $charset . '" ?>' . "\n";
654	$result .= "<!-- This is a WordPress eXtended RSS file generated by WordPress as an export of your site. -->\n";
655	$result .= "<!-- It contains information about your site's posts, pages, comments, categories, and other content. -->\n";
656	$result .= "<!-- You may use this file to transfer that content from one site to another. -->\n";
657	$result .= "<!-- This file is not intended to serve as a complete backup of your site. -->\n\n";
658	$result .= "<!-- To import this information into a WordPress site follow these steps: -->\n";
659	$result .= "<!-- 1. Log in to that site as an administrator. -->\n";
660	$result .= "<!-- 2. Go to Tools: Import in the WordPress admin panel. -->\n";
661	$result .= "<!-- 3. Install the \"WordPress\" importer from the list. -->\n";
662	$result .= "<!-- 4. Activate & Run Importer. -->\n";
663	$result .= "<!-- 5. Upload this file using the form provided on that page. -->\n";
664	$result .= "<!-- 6. You will first be asked to map the authors in this export file to users -->\n";
665	$result .= "<!-- on the site. For each author, you may choose to map to an -->\n";
666	$result .= "<!-- existing user on the site or to create a new user. -->\n";
667	$result .= "<!-- 7. WordPress will then import each of the posts, pages, comments, categories, etc. -->\n";
668	$result .= "<!-- contained in this file into your site. -->\n";
669	$result .= $generator . "\n";
670	$result .= '<rss version="2.0"' . "\n";
671	$result .= "\txmlns:excerpt=\"http://wordpress.org/export/{$wxr_version}/excerpt/\"\n";
672	$result .= "\txmlns:content=\"http://purl.org/rss/1.0/modules/content/\"\n";
673	$result .= "\txmlns:wfw=\"http://wellformedweb.org/CommentAPI/\"\n";
674	$result .= "\txmlns:dc=\"http://purl.org/dc/elements/1.1/\"\n";
675	$result .= "\txmlns:wp=\"http://wordpress.org/export/{$wxr_version}/\"\n";
676	$result .= ">\n";
677	$result .= "\t<channel>\n";
678	$result .= "\t\t<title>{$rss_info_name}</title>\n";
679	$result .= "\t\t<link>{$rss_info_url}</link>\n";
680	$result .= "\t\t<description>{$rss_info_description}</description>\n";
681	$result .= "\t\t<pubDate>{$pub_date}</pubDate>\n";
682	$result .= "\t\t<language>{$rss_info_language}</language>\n";
683	$result .= "\t\t<wp:wxr_version>{$wxr_version}</wp:wxr_version>\n";
684	$result .= "\t\t<wp:base_site_url>{$wxr_site_url}</wp:base_site_url>\n";
685	$result .= "\t\t<wp:base_blog_url>{$rss_info_url}</wp:base_blog_url>\n";
686	$result .= "\t\t" . $dynamic . "\n";
687	$result .= "\t</channel>\n";
688	$result .= "</rss>\n";
689
690	return $result;
691	}
692	}
693