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<?php
/**
* WordPress Export Administration API
*
* @package WordPress
* @subpackage Administration
*/
/**
* Version number for the export format.
*
* Bump this when something changes that might affect compatibility.
*
* @since 2.5.0
*/
define( 'WXR_VERSION', '1.2' );
/**
* Generates the WXR export file for download.
*
* @since 2.1.0
*
* @global wpdb $wpdb
* @global WP_Post $post
*
* @param array $args Filters defining what should be included in the export.
*/
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 = date( 'Y-m-d' );
$wp_filename = $sitename . 'wordpress.' . $date . '.xml';
/**
* Filter 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' );
$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'] ) {
if ( $term = term_exists( $args['category'], 'category' ) ) {
$join = "INNER JOIN {$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 ( 'post' == $args['content'] || 'page' == $args['content'] || 'attachment' == $args['content'] ) {
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", date( 'Y-m-d', strtotime($args['start_date']) ) );
if ( $args['end_date'] )
$where .= $wpdb->prepare( " AND {$wpdb->posts}.post_date < %s", date( '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 = $tags = $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( $custom_taxonomies, array( 'get' => 'all' ) );
// Put categories in order with no child going before its parent.
while ( $cat = array_shift( $categories ) ) {
if ( $cat->parent == 0 || 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 == 0 || isset( $terms[$t->parent] ) )
$terms[$t->term_id] = $t;
else
$custom_terms[] = $t;
}
unset( $categories, $custom_taxonomies, $custom_terms );
}
/**
* Wrap 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;
}
/**
* Return the URL of the site
*
* @since 2.5.0
*
* @return string Site URL.
*/
function wxr_site_url() {
// Multisite: the base URL.
if ( is_multisite() )
return network_home_url();
// WordPress (single site): the blog URL.
else
return get_bloginfo_rss( 'url' );
}
/**
* Output a cat_name XML tag from a given category object
*
* @since 2.1.0
*
* @param object $category Category Object
*/
function wxr_cat_name( $category ) {
if ( empty( $category->name ) )
return;
echo '<wp:cat_name>' . wxr_cdata( $category->name ) . '</wp:cat_name>';
}
/**
* Output a category_description XML tag from a given category object
*
* @since 2.1.0
*
* @param object $category Category Object
*/
function wxr_category_description( $category ) {
if ( empty( $category->description ) )
return;
echo '<wp:category_description>' . wxr_cdata( $category->description ) . '</wp:category_description>';
}
/**
* Output a tag_name XML tag from a given tag object
*
* @since 2.3.0
*
* @param object $tag Tag Object
*/
function wxr_tag_name( $tag ) {
if ( empty( $tag->name ) )
return;
echo '<wp:tag_name>' . wxr_cdata( $tag->name ) . '</wp:tag_name>';
}
/**
* Output a tag_description XML tag from a given tag object
*
* @since 2.3.0
*
* @param object $tag Tag Object
*/
function wxr_tag_description( $tag ) {
if ( empty( $tag->description ) )
return;
echo '<wp:tag_description>' . wxr_cdata( $tag->description ) . '</wp:tag_description>';
}
/**
* Output a term_name XML tag from a given term object
*
* @since 2.9.0
*
* @param object $term Term Object
*/
function wxr_term_name( $term ) {
if ( empty( $term->name ) )
return;
echo '<wp:term_name>' . wxr_cdata( $term->name ) . '</wp:term_name>';
}
/**
* Output a term_description XML tag from a given term object
*
* @since 2.9.0
*
* @param object $term Term Object
*/
function wxr_term_description( $term ) {
if ( empty( $term->description ) )
return;
echo '<wp:term_description>' . wxr_cdata( $term->description ) . '</wp:term_description>';
}
/**
* Output list of authors with posts
*
* @since 3.1.0
*
* @global wpdb $wpdb WordPress database abstraction object.
*
* @param array $post_ids Array of post IDs to filter the query by. Optional.
*/
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>' . intval( $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";
}
}
/**
* Ouput 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>' . intval( $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";
}
}
/**
* Output 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 $term ) {
echo "\t\t<category domain=\"{$term->taxonomy}\" nicename=\"{$term->slug}\">" . wxr_cdata( $term->name ) . "</category>\n";
}
}
/**
*
* @param bool $return_me
* @param string $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 date( '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 intval( $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 ); ?><?php wxr_category_description( $c ); ?></wp:category>
<?php endforeach; ?>
<?php foreach ( $tags as $t ) : ?>
<wp:tag><wp:term_id><?php echo intval( $t->term_id ); ?></wp:term_id><wp:tag_slug><?php echo wxr_cdata( $t->slug ); ?></wp:tag_slug><?php wxr_tag_name( $t ); ?><?php wxr_tag_description( $t ); ?></wp:tag>
<?php endforeach; ?>
<?php foreach ( $terms as $t ) : ?>
<wp:term><wp:term_id><?php echo wxr_cdata( $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 ); ?><?php wxr_term_description( $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
*/
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 (' . join( ',', $next_posts ) . ')';
$posts = $wpdb->get_results( "SELECT * FROM {$wpdb->posts} $where" );
// Begin Loop.
foreach ( $posts as $post ) {
setup_postdata( $post );
$is_sticky = is_sticky( $post->ID ) ? 1 : 0;
?>
<item>
<title><?php
/** This filter is documented in wp-includes/feed.php */
echo apply_filters( 'the_title_rss', $post->post_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
/**
* Filter the post content used for WXR exports.
*
* @since 2.5.0
*
* @param string $post_content Content of the current post.
*/
echo wxr_cdata( apply_filters( 'the_content_export', $post->post_content ) );
?></content:encoded>
<excerpt:encoded><?php
/**
* Filter the post excerpt used for WXR exports.
*
* @since 2.6.0
*
* @param string $post_excerpt Excerpt for the current post.
*/
echo wxr_cdata( apply_filters( 'the_excerpt_export', $post->post_excerpt ) );
?></excerpt:encoded>
<wp:post_id><?php echo intval( $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: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 intval( $post->post_parent ); ?></wp:post_parent>
<wp:menu_order><?php echo intval( $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 intval( $is_sticky ); ?></wp:is_sticky>
<?php if ( $post->post_type == 'attachment' ) : ?>
<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 ) :
/**
* Filter whether to selectively skip post meta used for WXR exports.
*
* Returning a truthy value to 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 intval( $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 esc_url_raw( $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 intval( $c->comment_parent ); ?></wp:comment_parent>
<wp:comment_user_id><?php echo intval( $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 ) :
/**
* Filter whether to selectively skip comment meta used for WXR exports.
*
* Returning a truthy value to 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
}