1<?php
  2/**
  3 * WordPress Export Administration API
  4 *
  5 * @package WordPress
  6 * @subpackage Administration
  7 */
  8
  9/**
 10 * Version number for the export format.
 11 *
 12 * Bump this when something changes that might affect compatibility.
 13 *
 14 * @since 2.5.0
 15 */
 16define( 'WXR_VERSION', '1.2' );
 17
 18/**
 19 * Generates the WXR export file for download.
 20 *
 21 * Default behavior is to export all content, however, note that post content will only
 22 * be exported for post types with the `can_export` argument enabled. Any posts with the
 23 * 'auto-draft' status will be skipped.
 24 *
 25 * @since 2.1.0
 26 * @since 5.7.0 Added the `post_modified` and `post_modified_gmt` fields to the export file.
 27 *
 28 * @global wpdb    $wpdb WordPress database abstraction object.
 29 * @global WP_Post $post Global post object.
 30 *
 31 * @param array $args {
 32 *     Optional. Arguments for generating the WXR export file for download. Default empty array.
 33 *
 34 *     @type string $content    Type of content to export. If set, only the post content of this post type
 35 *                              will be exported. Accepts 'all', 'post', 'page', 'attachment', or a defined
 36 *                              custom post. If an invalid custom post type is supplied, every post type for
 37 *                              which `can_export` is enabled will be exported instead. If a valid custom post
 38 *                              type is supplied but `can_export` is disabled, then 'posts' will be exported
 39 *                              instead. When 'all' is supplied, only post types with `can_export` enabled will
 40 *                              be exported. Default 'all'.
 41 *     @type string $author     Author to export content for. Only used when `$content` is 'post', 'page', or
 42 *                              'attachment'. Accepts false (all) or a specific author ID. Default false (all).
 43 *     @type string $category   Category (slug) to export content for. Used only when `$content` is 'post'. If
 44 *                              set, only post content assigned to `$category` will be exported. Accepts false
 45 *                              or a specific category slug. Default is false (all categories).
 46 *     @type string $start_date Start date to export content from. Expected date format is 'Y-m-d'. Used only
 47 *                              when `$content` is 'post', 'page' or 'attachment'. Default false (since the
 48 *                              beginning of time).
 49 *     @type string $end_date   End date to export content to. Expected date format is 'Y-m-d'. Used only when
 50 *                              `$content` is 'post', 'page' or 'attachment'. Default false (latest publish date).
 51 *     @type string $status     Post status to export posts for. Used only when `$content` is 'post' or 'page'.
 52 *                              Accepts false (all statuses except 'auto-draft'), or a specific status, i.e.
 53 *                              'publish', 'pending', 'draft', 'auto-draft', 'future', 'private', 'inherit', or
 54 *                              'trash'. Default false (all statuses except 'auto-draft').
 55 * }
 56 */
 57function export_wp( $args = array() ) {
 58	global $wpdb, $post;
 59
 60	$defaults = array(
 61		'content'    => 'all',
 62		'author'     => false,
 63		'category'   => false,
 64		'start_date' => false,
 65		'end_date'   => false,
 66		'status'     => false,
 67	);
 68	$args     = wp_parse_args( $args, $defaults );
 69
 70	/**
 71	 * Fires at the beginning of an export, before any headers are sent.
 72	 *
 73	 * @since 2.3.0
 74	 *
 75	 * @param array $args An array of export arguments.
 76	 */
 77	do_action( 'export_wp', $args );
 78
 79	$sitename = sanitize_key( get_bloginfo( 'name' ) );
 80	if ( ! empty( $sitename ) ) {
 81		$sitename .= '.';
 82	}
 83	$date        = gmdate( 'Y-m-d' );
 84	$wp_filename = $sitename . 'WordPress.' . $date . '.xml';
 85	/**
 86	 * Filters the export filename.
 87	 *
 88	 * @since 4.4.0
 89	 *
 90	 * @param string $wp_filename The name of the file for download.
 91	 * @param string $sitename    The site name.
 92	 * @param string $date        Today's date, formatted.
 93	 */
 94	$filename = apply_filters( 'export_wp_filename', $wp_filename, $sitename, $date );
 95
 96	header( 'Content-Description: File Transfer' );
 97	header( 'Content-Disposition: attachment; filename=' . $filename );
 98	header( 'Content-Type: text/xml; charset=' . get_option( 'blog_charset' ), true );
 99
100	if ( 'all' !== $args['content'] && post_type_exists( $args['content'] ) ) {
101		$ptype = get_post_type_object( $args['content'] );
102		if ( ! $ptype->can_export ) {
103			$args['content'] = 'post';
104		}
105
106		$where = $wpdb->prepare( "{$wpdb->posts}.post_type = %s", $args['content'] );
107	} else {
108		$post_types = get_post_types( array( 'can_export' => true ) );
109		$esses      = array_fill( 0, count( $post_types ), '%s' );
110
111		// phpcs:ignore WordPress.DB.PreparedSQLPlaceholders.UnfinishedPrepare
112		$where = $wpdb->prepare( "{$wpdb->posts}.post_type IN (" . implode( ',', $esses ) . ')', $post_types );
113	}
114
115	if ( $args['status'] && ( 'post' === $args['content'] || 'page' === $args['content'] ) ) {
116		$where .= $wpdb->prepare( " AND {$wpdb->posts}.post_status = %s", $args['status'] );
117	} else {
118		$where .= " AND {$wpdb->posts}.post_status != 'auto-draft'";
119	}
120
121	$join = '';
122	if ( $args['category'] && 'post' === $args['content'] ) {
123		$term = term_exists( $args['category'], 'category' );
124		if ( $term ) {
125			$join   = "INNER JOIN {$wpdb->term_relationships} ON ({$wpdb->posts}.ID = {$wpdb->term_relationships}.object_id)";
126			$where .= $wpdb->prepare( " AND {$wpdb->term_relationships}.term_taxonomy_id = %d", $term['term_taxonomy_id'] );
127		}
128	}
129
130	if ( in_array( $args['content'], array( 'post', 'page', 'attachment' ), true ) ) {
131		if ( $args['author'] ) {
132			$where .= $wpdb->prepare( " AND {$wpdb->posts}.post_author = %d", $args['author'] );
133		}
134
135		if ( $args['start_date'] ) {
136			$where .= $wpdb->prepare( " AND {$wpdb->posts}.post_date >= %s", gmdate( 'Y-m-d', strtotime( $args['start_date'] ) ) );
137		}
138
139		if ( $args['end_date'] ) {
140			$where .= $wpdb->prepare( " AND {$wpdb->posts}.post_date < %s", gmdate( 'Y-m-d', strtotime( '+1 month', strtotime( $args['end_date'] ) ) ) );
141		}
142	}
143
144	// Grab a snapshot of post IDs, just in case it changes during the export.
145	$post_ids = $wpdb->get_col( "SELECT ID FROM {$wpdb->posts} $join WHERE $where" );
146
147	// Get IDs for the attachments of each post, unless all content is already being exported.
148	if ( ! in_array( $args['content'], array( 'all', 'attachment' ), true ) ) {
149		// Array to hold all additional IDs (attachments and thumbnails).
150		$additional_ids = array();
151
152		// Create a copy of the post IDs array to avoid modifying the original array.
153		$processing_ids = $post_ids;
154
155		while ( $next_posts = array_splice( $processing_ids, 0, 20 ) ) {
156			$posts_in     = array_map( 'absint', $next_posts );
157			$placeholders = array_fill( 0, count( $posts_in ), '%d' );
158
159			// Create a string for the placeholders.
160			$in_placeholder = implode( ',', $placeholders );
161
162			// Prepare the SQL statement for attachment ids.
163			$attachment_ids = $wpdb->get_col(
164				$wpdb->prepare(
165					"
166				SELECT ID
167				FROM $wpdb->posts
168				WHERE post_parent IN ($in_placeholder) AND post_type = 'attachment'
169					",
170					$posts_in
171				)
172			);
173
174			$thumbnails_ids = $wpdb->get_col(
175				$wpdb->prepare(
176					"
177				SELECT meta_value
178				FROM $wpdb->postmeta
179				WHERE $wpdb->postmeta.post_id IN ($in_placeholder)
180				AND $wpdb->postmeta.meta_key = '_thumbnail_id'
181					",
182					$posts_in
183				)
184			);
185
186			$additional_ids = array_merge( $additional_ids, $attachment_ids, $thumbnails_ids );
187		}
188
189		// Merge the additional IDs back with the original post IDs after processing all posts
190		$post_ids = array_unique( array_merge( $post_ids, $additional_ids ) );
191	}
192
193	/*
194	 * Get the requested terms ready, empty unless posts filtered by category
195	 * or all content.
196	 */
197	$cats  = array();
198	$tags  = array();
199	$terms = array();
200	if ( isset( $term ) && $term ) {
201		$cat  = get_term( $term['term_id'], 'category' );
202		$cats = array( $cat->term_id => $cat );
203		unset( $term, $cat );
204	} elseif ( 'all' === $args['content'] ) {
205		$categories = (array) get_categories( array( 'get' => 'all' ) );
206		$tags       = (array) get_tags( array( 'get' => 'all' ) );
207
208		$custom_taxonomies = get_taxonomies( array( '_builtin' => false ) );
209		$custom_terms      = (array) get_terms(
210			array(
211				'taxonomy' => $custom_taxonomies,
212				'get'      => 'all',
213			)
214		);
215
216		// Put categories in order with no child going before its parent.
217		while ( $cat = array_shift( $categories ) ) {
218			if ( ! $cat->parent || isset( $cats[ $cat->parent ] ) ) {
219				$cats[ $cat->term_id ] = $cat;
220			} else {
221				$categories[] = $cat;
222			}
223		}
224
225		// Put terms in order with no child going before its parent.
226		while ( $t = array_shift( $custom_terms ) ) {
227			if ( ! $t->parent || isset( $terms[ $t->parent ] ) ) {
228				$terms[ $t->term_id ] = $t;
229			} else {
230				$custom_terms[] = $t;
231			}
232		}
233
234		unset( $categories, $custom_taxonomies, $custom_terms );
235	}
236
237	/**
238	 * Wraps given string in XML CDATA tag.
239	 *
240	 * @since 2.1.0
241	 *
242	 * @param string|null $str String to wrap in XML CDATA tag. May be null.
243	 * @return string
244	 */
245	function wxr_cdata( $str ) {
246		$str = (string) $str;
247
248		if ( ! wp_is_valid_utf8( $str ) ) {
249			$str = utf8_encode( $str );
250		}
251		// $str = ent2ncr(esc_html($str));
252		$str = '<![CDATA[' . str_replace( ']]>', ']]]]><![CDATA[>', $str ) . ']]>';
253
254		return $str;
255	}
256
257	/**
258	 * Returns the URL of the site.
259	 *
260	 * @since 2.5.0
261	 *
262	 * @return string Site URL.
263	 */
264	function wxr_site_url() {
265		if ( is_multisite() ) {
266			// Multisite: the base URL.
267			return network_home_url();
268		} else {
269			// WordPress (single site): the site URL.
270			return get_bloginfo_rss( 'url' );
271		}
272	}
273
274	/**
275	 * Outputs a cat_name XML tag from a given category object.
276	 *
277	 * @since 2.1.0
278	 *
279	 * @param WP_Term $category Category Object.
280	 */
281	function wxr_cat_name( $category ) {
282		if ( empty( $category->name ) ) {
283			return;
284		}
285
286		echo '<wp:cat_name>' . wxr_cdata( $category->name ) . "</wp:cat_name>\n";
287	}
288
289	/**
290	 * Outputs a category_description XML tag from a given category object.
291	 *
292	 * @since 2.1.0
293	 *
294	 * @param WP_Term $category Category Object.
295	 */
296	function wxr_category_description( $category ) {
297		if ( empty( $category->description ) ) {
298			return;
299		}
300
301		echo '<wp:category_description>' . wxr_cdata( $category->description ) . "</wp:category_description>\n";
302	}
303
304	/**
305	 * Outputs a tag_name XML tag from a given tag object.
306	 *
307	 * @since 2.3.0
308	 *
309	 * @param WP_Term $tag Tag Object.
310	 */
311	function wxr_tag_name( $tag ) {
312		if ( empty( $tag->name ) ) {
313			return;
314		}
315
316		echo '<wp:tag_name>' . wxr_cdata( $tag->name ) . "</wp:tag_name>\n";
317	}
318
319	/**
320	 * Outputs a tag_description XML tag from a given tag object.
321	 *
322	 * @since 2.3.0
323	 *
324	 * @param WP_Term $tag Tag Object.
325	 */
326	function wxr_tag_description( $tag ) {
327		if ( empty( $tag->description ) ) {
328			return;
329		}
330
331		echo '<wp:tag_description>' . wxr_cdata( $tag->description ) . "</wp:tag_description>\n";
332	}
333
334	/**
335	 * Outputs a term_name XML tag from a given term object.
336	 *
337	 * @since 2.9.0
338	 *
339	 * @param WP_Term $term Term Object.
340	 */
341	function wxr_term_name( $term ) {
342		if ( empty( $term->name ) ) {
343			return;
344		}
345
346		echo '<wp:term_name>' . wxr_cdata( $term->name ) . "</wp:term_name>\n";
347	}
348
349	/**
350	 * Outputs a term_description XML tag from a given term object.
351	 *
352	 * @since 2.9.0
353	 *
354	 * @param WP_Term $term Term Object.
355	 */
356	function wxr_term_description( $term ) {
357		if ( empty( $term->description ) ) {
358			return;
359		}
360
361		echo "\t\t<wp:term_description>" . wxr_cdata( $term->description ) . "</wp:term_description>\n";
362	}
363
364	/**
365	 * Outputs term meta XML tags for a given term object.
366	 *
367	 * @since 4.6.0
368	 *
369	 * @global wpdb $wpdb WordPress database abstraction object.
370	 *
371	 * @param WP_Term $term Term object.
372	 */
373	function wxr_term_meta( $term ) {
374		global $wpdb;
375
376		$termmeta = $wpdb->get_results( $wpdb->prepare( "SELECT * FROM $wpdb->termmeta WHERE term_id = %d", $term->term_id ) );
377
378		foreach ( $termmeta as $meta ) {
379			/**
380			 * Filters whether to selectively skip term meta used for WXR exports.
381			 *
382			 * Returning a truthy value from the filter will skip the current meta
383			 * object from being exported.
384			 *
385			 * @since 4.6.0
386			 *
387			 * @param bool   $skip     Whether to skip the current piece of term meta. Default false.
388			 * @param string $meta_key Current meta key.
389			 * @param object $meta     Current meta object.
390			 */
391			if ( ! apply_filters( 'wxr_export_skip_termmeta', false, $meta->meta_key, $meta ) ) {
392				printf( "\t\t<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", wxr_cdata( $meta->meta_key ), wxr_cdata( $meta->meta_value ) );
393			}
394		}
395	}
396
397	/**
398	 * Outputs list of authors with posts.
399	 *
400	 * @since 3.1.0
401	 *
402	 * @global wpdb $wpdb WordPress database abstraction object.
403	 *
404	 * @param int[] $post_ids Optional. Array of post IDs to filter the query by.
405	 */
406	function wxr_authors_list( ?array $post_ids = null ) {
407		global $wpdb;
408
409		if ( ! empty( $post_ids ) ) {
410			$post_ids       = array_map( 'absint', $post_ids );
411			$post_id_chunks = array_chunk( $post_ids, 20 );
412		} else {
413			$post_id_chunks = array( array() );
414		}
415
416		$authors = array();
417
418		foreach ( $post_id_chunks as $next_posts ) {
419			$and = ! empty( $next_posts ) ? 'AND ID IN (' . implode( ', ', $next_posts ) . ')' : '';
420
421			$results = $wpdb->get_results( "SELECT DISTINCT post_author FROM $wpdb->posts WHERE post_status != 'auto-draft' $and" );
422
423			foreach ( (array) $results as $result ) {
424				$authors[] = get_userdata( $result->post_author );
425			}
426		}
427
428		$authors = array_filter( $authors );
429		$authors = array_unique( $authors, SORT_REGULAR ); // Remove duplicate authors.
430
431		foreach ( $authors as $author ) {
432			echo "\t<wp:author>";
433			echo '<wp:author_id>' . (int) $author->ID . '</wp:author_id>';
434			echo '<wp:author_login>' . wxr_cdata( $author->user_login ) . '</wp:author_login>';
435			echo '<wp:author_email>' . wxr_cdata( $author->user_email ) . '</wp:author_email>';
436			echo '<wp:author_display_name>' . wxr_cdata( $author->display_name ) . '</wp:author_display_name>';
437			echo '<wp:author_first_name>' . wxr_cdata( $author->first_name ) . '</wp:author_first_name>';
438			echo '<wp:author_last_name>' . wxr_cdata( $author->last_name ) . '</wp:author_last_name>';
439			echo "</wp:author>\n";
440		}
441	}
442
443	/**
444	 * Outputs all navigation menu terms.
445	 *
446	 * @since 3.1.0
447	 */
448	function wxr_nav_menu_terms() {
449		$nav_menus = wp_get_nav_menus();
450		if ( empty( $nav_menus ) || ! is_array( $nav_menus ) ) {
451			return;
452		}
453
454		foreach ( $nav_menus as $menu ) {
455			echo "\t<wp:term>";
456			echo '<wp:term_id>' . (int) $menu->term_id . '</wp:term_id>';
457			echo '<wp:term_taxonomy>nav_menu</wp:term_taxonomy>';
458			echo '<wp:term_slug>' . wxr_cdata( $menu->slug ) . '</wp:term_slug>';
459			wxr_term_name( $menu );
460			echo "</wp:term>\n";
461		}
462	}
463
464	/**
465	 * Outputs list of taxonomy terms, in XML tag format, associated with a post.
466	 *
467	 * @since 2.3.0
468	 */
469	function wxr_post_taxonomy() {
470		$post = get_post();
471
472		$taxonomies = get_object_taxonomies( $post->post_type );
473		if ( empty( $taxonomies ) ) {
474			return;
475		}
476		$terms = wp_get_object_terms( $post->ID, $taxonomies );
477
478		foreach ( (array) $terms as $term ) {
479			echo "\t\t<category domain=\"{$term->taxonomy}\" nicename=\"{$term->slug}\">" . wxr_cdata( $term->name ) . "</category>\n";
480		}
481	}
482
483	/**
484	 * Determines whether to selectively skip post meta used for WXR exports.
485	 *
486	 * @since 3.3.0
487	 *
488	 * @param bool   $return_me Whether to skip the current post meta. Default false.
489	 * @param string $meta_key  Meta key.
490	 * @return bool
491	 */
492	function wxr_filter_postmeta( $return_me, $meta_key ) {
493		if ( '_edit_lock' === $meta_key ) {
494			$return_me = true;
495		}
496		return $return_me;
497	}
498	add_filter( 'wxr_export_skip_postmeta', 'wxr_filter_postmeta', 10, 2 );
499
500	echo '<?xml version="1.0" encoding="' . get_bloginfo( 'charset' ) . "\" ?>\n";
501
502	?>
503<!-- This is a WordPress eXtended RSS file generated by WordPress as an export of your site. -->
504<!-- It contains information about your site's posts, pages, comments, categories, and other content. -->
505<!-- You may use this file to transfer that content from one site to another. -->
506<!-- This file is not intended to serve as a complete backup of your site. -->
507
508<!-- To import this information into a WordPress site follow these steps: -->
509<!-- 1. Log in to that site as an administrator. -->
510<!-- 2. Go to Tools: Import in the WordPress admin panel. -->
511<!-- 3. Install the "WordPress" importer from the list. -->
512<!-- 4. Activate & Run Importer. -->
513<!-- 5. Upload this file using the form provided on that page. -->
514<!-- 6. You will first be asked to map the authors in this export file to users -->
515<!--    on the site. For each author, you may choose to map to an -->
516<!--    existing user on the site or to create a new user. -->
517<!-- 7. WordPress will then import each of the posts, pages, comments, categories, etc. -->
518<!--    contained in this file into your site. -->
519
520	<?php the_generator( 'export' ); ?>
521<rss version="2.0"
522	xmlns:excerpt="http://wordpress.org/export/<?php echo WXR_VERSION; ?>/excerpt/"
523	xmlns:content="http://purl.org/rss/1.0/modules/content/"
524	xmlns:wfw="http://wellformedweb.org/CommentAPI/"
525	xmlns:dc="http://purl.org/dc/elements/1.1/"
526	xmlns:wp="http://wordpress.org/export/<?php echo WXR_VERSION; ?>/"
527>
528
529<channel>
530	<title><?php bloginfo_rss( 'name' ); ?></title>
531	<link><?php bloginfo_rss( 'url' ); ?></link>
532	<description><?php bloginfo_rss( 'description' ); ?></description>
533	<pubDate><?php echo gmdate( 'D, d M Y H:i:s +0000' ); ?></pubDate>
534	<language><?php bloginfo_rss( 'language' ); ?></language>
535	<wp:wxr_version><?php echo WXR_VERSION; ?></wp:wxr_version>
536	<wp:base_site_url><?php echo wxr_site_url(); ?></wp:base_site_url>
537	<wp:base_blog_url><?php bloginfo_rss( 'url' ); ?></wp:base_blog_url>
538
539	<?php wxr_authors_list( $post_ids ); ?>
540
541	<?php foreach ( $cats as $c ) : ?>
542	<wp:category>
543		<wp:term_id><?php echo (int) $c->term_id; ?></wp:term_id>
544		<wp:category_nicename><?php echo wxr_cdata( $c->slug ); ?></wp:category_nicename>
545		<wp:category_parent><?php echo wxr_cdata( $c->parent ? $cats[ $c->parent ]->slug : '' ); ?></wp:category_parent>
546		<?php
547		wxr_cat_name( $c );
548		wxr_category_description( $c );
549		wxr_term_meta( $c );
550		?>
551	</wp:category>
552	<?php endforeach; ?>
553	<?php foreach ( $tags as $t ) : ?>
554	<wp:tag>
555		<wp:term_id><?php echo (int) $t->term_id; ?></wp:term_id>
556		<wp:tag_slug><?php echo wxr_cdata( $t->slug ); ?></wp:tag_slug>
557		<?php
558		wxr_tag_name( $t );
559		wxr_tag_description( $t );
560		wxr_term_meta( $t );
561		?>
562	</wp:tag>
563	<?php endforeach; ?>
564	<?php foreach ( $terms as $t ) : ?>
565	<wp:term>
566		<wp:term_id><?php echo (int) $t->term_id; ?></wp:term_id>
567		<wp:term_taxonomy><?php echo wxr_cdata( $t->taxonomy ); ?></wp:term_taxonomy>
568		<wp:term_slug><?php echo wxr_cdata( $t->slug ); ?></wp:term_slug>
569		<wp:term_parent><?php echo wxr_cdata( $t->parent ? $terms[ $t->parent ]->slug : '' ); ?></wp:term_parent>
570		<?php
571		wxr_term_name( $t );
572		wxr_term_description( $t );
573		wxr_term_meta( $t );
574		?>
575	</wp:term>
576	<?php endforeach; ?>
577	<?php
578	if ( 'all' === $args['content'] ) {
579		wxr_nav_menu_terms();
580	}
581	?>
582
583	<?php
584	/** This action is documented in wp-includes/feed-rss2.php */
585	do_action( 'rss2_head' );
586	?>
587
588	<?php
589	if ( $post_ids ) {
590		/**
591		 * @global WP_Query $wp_query WordPress Query object.
592		 */
593		global $wp_query;
594
595		// Fake being in the loop.
596		$wp_query->in_the_loop = true;
597
598		// Fetch 20 posts at a time rather than loading the entire table into memory.
599		while ( $next_posts = array_splice( $post_ids, 0, 20 ) ) {
600			$where = 'WHERE ID IN (' . implode( ',', $next_posts ) . ')';
601			$posts = $wpdb->get_results( "SELECT * FROM {$wpdb->posts} $where" );
602
603			// Begin Loop.
604			foreach ( $posts as $post ) {
605				setup_postdata( $post );
606
607				/**
608				 * Filters the post title used for WXR exports.
609				 *
610				 * @since 5.7.0
611				 *
612				 * @param string $post_title Title of the current post.
613				 */
614				$title = wxr_cdata( apply_filters( 'the_title_export', $post->post_title ) );
615
616				/**
617				 * Filters the post content used for WXR exports.
618				 *
619				 * @since 2.5.0
620				 *
621				 * @param string $post_content Content of the current post.
622				 */
623				$content = wxr_cdata( apply_filters( 'the_content_export', $post->post_content ) );
624
625				/**
626				 * Filters the post excerpt used for WXR exports.
627				 *
628				 * @since 2.6.0
629				 *
630				 * @param string $post_excerpt Excerpt for the current post.
631				 */
632				$excerpt = wxr_cdata( apply_filters( 'the_excerpt_export', $post->post_excerpt ) );
633
634				$is_sticky = is_sticky( $post->ID ) ? 1 : 0;
635				?>
636	<item>
637		<title><?php echo $title; ?></title>
638		<link><?php the_permalink_rss(); ?></link>
639		<pubDate><?php echo mysql2date( 'D, d M Y H:i:s +0000', get_post_time( 'Y-m-d H:i:s', true ), false ); ?></pubDate>
640		<dc:creator><?php echo wxr_cdata( get_the_author_meta( 'login' ) ); ?></dc:creator>
641		<guid isPermaLink="false"><?php the_guid(); ?></guid>
642		<description></description>
643		<content:encoded><?php echo $content; ?></content:encoded>
644		<excerpt:encoded><?php echo $excerpt; ?></excerpt:encoded>
645		<wp:post_id><?php echo (int) $post->ID; ?></wp:post_id>
646		<wp:post_date><?php echo wxr_cdata( $post->post_date ); ?></wp:post_date>
647		<wp:post_date_gmt><?php echo wxr_cdata( $post->post_date_gmt ); ?></wp:post_date_gmt>
648		<wp:post_modified><?php echo wxr_cdata( $post->post_modified ); ?></wp:post_modified>
649		<wp:post_modified_gmt><?php echo wxr_cdata( $post->post_modified_gmt ); ?></wp:post_modified_gmt>
650		<wp:comment_status><?php echo wxr_cdata( $post->comment_status ); ?></wp:comment_status>
651		<wp:ping_status><?php echo wxr_cdata( $post->ping_status ); ?></wp:ping_status>
652		<wp:post_name><?php echo wxr_cdata( $post->post_name ); ?></wp:post_name>
653		<wp:status><?php echo wxr_cdata( $post->post_status ); ?></wp:status>
654		<wp:post_parent><?php echo (int) $post->post_parent; ?></wp:post_parent>
655		<wp:menu_order><?php echo (int) $post->menu_order; ?></wp:menu_order>
656		<wp:post_type><?php echo wxr_cdata( $post->post_type ); ?></wp:post_type>
657		<wp:post_password><?php echo wxr_cdata( $post->post_password ); ?></wp:post_password>
658		<wp:is_sticky><?php echo (int) $is_sticky; ?></wp:is_sticky>
659				<?php	if ( 'attachment' === $post->post_type ) : ?>
660		<wp:attachment_url><?php echo wxr_cdata( wp_get_attachment_url( $post->ID ) ); ?></wp:attachment_url>
661	<?php endif; ?>
662				<?php wxr_post_taxonomy(); ?>
663				<?php
664				$postmeta = $wpdb->get_results( $wpdb->prepare( "SELECT * FROM $wpdb->postmeta WHERE post_id = %d", $post->ID ) );
665				foreach ( $postmeta as $meta ) :
666					/**
667					 * Filters whether to selectively skip post meta used for WXR exports.
668					 *
669					 * Returning a truthy value from the filter will skip the current meta
670					 * object from being exported.
671					 *
672					 * @since 3.3.0
673					 *
674					 * @param bool   $skip     Whether to skip the current post meta. Default false.
675					 * @param string $meta_key Current meta key.
676					 * @param object $meta     Current meta object.
677					 */
678					if ( apply_filters( 'wxr_export_skip_postmeta', false, $meta->meta_key, $meta ) ) {
679						continue;
680					}
681					?>
682		<wp:postmeta>
683		<wp:meta_key><?php echo wxr_cdata( $meta->meta_key ); ?></wp:meta_key>
684		<wp:meta_value><?php echo wxr_cdata( $meta->meta_value ); ?></wp:meta_value>
685		</wp:postmeta>
686					<?php
687	endforeach;
688
689				$_comments = $wpdb->get_results( $wpdb->prepare( "SELECT * FROM $wpdb->comments WHERE comment_post_ID = %d AND comment_approved <> 'spam'", $post->ID ) );
690				$comments  = array_map( 'get_comment', $_comments );
691				foreach ( $comments as $c ) :
692					?>
693		<wp:comment>
694			<wp:comment_id><?php echo (int) $c->comment_ID; ?></wp:comment_id>
695			<wp:comment_author><?php echo wxr_cdata( $c->comment_author ); ?></wp:comment_author>
696			<wp:comment_author_email><?php echo wxr_cdata( $c->comment_author_email ); ?></wp:comment_author_email>
697			<wp:comment_author_url><?php echo sanitize_url( $c->comment_author_url ); ?></wp:comment_author_url>
698			<wp:comment_author_IP><?php echo wxr_cdata( $c->comment_author_IP ); ?></wp:comment_author_IP>
699			<wp:comment_date><?php echo wxr_cdata( $c->comment_date ); ?></wp:comment_date>
700			<wp:comment_date_gmt><?php echo wxr_cdata( $c->comment_date_gmt ); ?></wp:comment_date_gmt>
701			<wp:comment_content><?php echo wxr_cdata( $c->comment_content ); ?></wp:comment_content>
702			<wp:comment_approved><?php echo wxr_cdata( $c->comment_approved ); ?></wp:comment_approved>
703			<wp:comment_type><?php echo wxr_cdata( $c->comment_type ); ?></wp:comment_type>
704			<wp:comment_parent><?php echo (int) $c->comment_parent; ?></wp:comment_parent>
705			<wp:comment_user_id><?php echo (int) $c->user_id; ?></wp:comment_user_id>
706					<?php
707					$c_meta = $wpdb->get_results( $wpdb->prepare( "SELECT * FROM $wpdb->commentmeta WHERE comment_id = %d", $c->comment_ID ) );
708					foreach ( $c_meta as $meta ) :
709						/**
710						 * Filters whether to selectively skip comment meta used for WXR exports.
711						 *
712						 * Returning a truthy value from the filter will skip the current meta
713						 * object from being exported.
714						 *
715						 * @since 4.0.0
716						 *
717						 * @param bool   $skip     Whether to skip the current comment meta. Default false.
718						 * @param string $meta_key Current meta key.
719						 * @param object $meta     Current meta object.
720						 */
721						if ( apply_filters( 'wxr_export_skip_commentmeta', false, $meta->meta_key, $meta ) ) {
722							continue;
723						}
724						?>
725	<wp:commentmeta>
726	<wp:meta_key><?php echo wxr_cdata( $meta->meta_key ); ?></wp:meta_key>
727			<wp:meta_value><?php echo wxr_cdata( $meta->meta_value ); ?></wp:meta_value>
728			</wp:commentmeta>
729					<?php	endforeach; ?>
730		</wp:comment>
731			<?php	endforeach; ?>
732		</item>
733				<?php
734			}
735		}
736	}
737	?>
738</channel>
739</rss>
740	<?php
741}
742