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WordPress: Class to allow automatically import posts/pages

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autoimporter.php
PHP
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<?php
/** Display verbose errors */
define( 'IMPORT_DEBUG', false );
 
// Load Importer API
require_once ABSPATH . 'wp-admin/includes/import.php';
 
if ( ! class_exists( 'WP_Importer' ) ) {
$class_wp_importer = ABSPATH . 'wp-admin/includes/class-wp-importer.php';
if ( file_exists( $class_wp_importer ) )
require $class_wp_importer;
}
 
$required = array(
'post_exists' => ABSPATH . 'wp-admin/includes/post.php',
'wp_generate_attachment_metadata' => ABSPATH . 'wp-admin/includes/image.php',
'comment_exists' => ABSPATH . 'wp-admin/includes/comment.php'
);
 
foreach ( $required as $func => $req_file ) {
if ( ! function_exists( $func ) )
require_once $req_file;
}
 
 
// include WXR file parsers
require dirname( __FILE__ ) . '/parsers.php';
 
if ( ! class_exists( 'WP_Importer' ) )
die( 'WP_Importer not found' );
 
/**
* WordPress Importer class for managing the import process of a WXR file
*
* @package WordPress
* @subpackage Importer
*/
if ( ! class_exists( 'Auto_Importer' ) ) {
class Auto_Importer extends WP_Importer
{
var $max_wxr_version = 1.2; // max. supported WXR version
 
var $id; // WXR attachment ID
 
// information to import from WXR file
var $version;
var $authors = array();
var $posts = array();
var $terms = array();
var $categories = array();
var $tags = array();
var $base_url = '';
 
// mappings from old information to new
var $processed_authors = array();
var $author_mapping = array();
var $processed_terms = array();
var $processed_posts = array();
var $post_orphans = array();
var $processed_menu_items = array();
var $menu_item_orphans = array();
var $missing_menu_items = array();
 
var $fetch_attachments = false;
var $url_remap = array();
var $featured_images = array();
 
var $xmlfile = '';
var $map_user_id = 0;
 
function Auto_Importer( $args ) {
 
if ( file_exists( $args['file'] ) ) {
 
// for windows systems
$file = str_replace( '\\', '/', $args['file'] );
 
$this->xmlfile = $file;
}
 
if ( isset( $args['map_user_id'] ) )
$this->map_user_id = $args['map_user_id'];
 
}
 
/**
* Registered callback function for the WordPress Importer
*
* Manages the three separate stages of the WXR import process
*/
function do_import() {
 
$this->handle_upload();
 
$this->fetch_attachments = $this->allow_fetch_attachments();
// $this->id = ... the ID was already set in $this->handle_upload();
$file = get_attached_file( $this->id );
 
// get_attachment_file() add the uploaddir to the filename, we have to remove it
$uploads = wp_upload_dir();
$file = str_replace( $uploads['basedir'] . '/', '', $file );
 
set_time_limit(0);
$this->import( $file );
 
}
 
/**
* The main controller for the actual import stage.
*
* @param string $file Path to the WXR file for importing
*/
function import( $file ) {
add_filter( 'import_post_meta_key', array( $this, 'is_valid_meta_key' ) );
add_filter( 'http_request_timeout', array( &$this, 'bump_request_timeout' ) );
 
$this->import_start( $file );
 
$this->get_author_mapping( $this->map_user_id );
 
wp_suspend_cache_invalidation( true );
$this->process_categories();
$this->process_tags();
$this->process_terms();
$this->process_posts();
wp_suspend_cache_invalidation( false );
 
// update incorrect/missing information in the DB
$this->backfill_parents();
$this->backfill_attachment_urls();
$this->remap_featured_images();
 
$this->import_end();
}
 
/**
* Parses the WXR file and prepares us for the task of processing parsed data
*
* @param string $file Path to the WXR file for importing
*/
function import_start( $file ) {
 
if ( ! is_file($file) ) {
echo '<p><strong>' . __( 'Sorry, there has been an error.', 'wordpress-importer' ) . '</strong><br />';
echo __( 'The file does not exist, please try again.', 'wordpress-importer' ) . '</p>';
die();
}
 
$import_data = $this->parse( $file );
 
if ( is_wp_error( $import_data ) ) {
echo '<p><strong>' . __( 'Sorry, there has been an error.', 'wordpress-importer' ) . '</strong><br />';
echo esc_html( $import_data->get_error_message() ) . '</p>';
die();
}
 
$this->version = $import_data['version'];
$this->get_authors_from_import( $import_data );
$this->posts = $import_data['posts'];
$this->terms = $import_data['terms'];
$this->categories = $import_data['categories'];
$this->tags = $import_data['tags'];
$this->base_url = esc_url( $import_data['base_url'] );
 
wp_defer_term_counting( true );
wp_defer_comment_counting( true );
 
do_action( 'import_start' );
}
 
/**
* Performs post-import cleanup of files and the cache
*/
function import_end() {
wp_import_cleanup( $this->id );
 
wp_cache_flush();
foreach ( get_taxonomies() as $tax ) {
delete_option( "{$tax}_children" );
_get_term_hierarchy( $tax );
}
 
wp_defer_term_counting( false );
wp_defer_comment_counting( false );
 
do_action( 'import_end' );
}
 
function import_handle_upload() {
 
$url = get_template_directory_uri() . str_replace( TEMPLATEPATH, '', $this->xmlfile );
$type = 'application/xml'; // we know the mime type of our file
$file = $this->xmlfile;
$filename = basename( $this->xmlfile );
 
// Construct the object array
$object = array( 'post_title' => $filename,
'post_content' => $url,
'post_mime_type' => $type,
'guid' => $url,
'context' => 'import',
'post_status' => 'private'
);
 
// Save the data
$id = wp_insert_attachment( $object, $file );
 
// schedule a cleanup for one day from now in case of failed import or missing wp_import_cleanup() call
wp_schedule_single_event( time() + DAY_IN_SECONDS, 'importer_scheduled_cleanup', array( $id ) );
 
return array( 'file' => $file, 'id' => $id );
}
 
/**
* Handles the WXR upload and initial parsing of the file to prepare for
* displaying author import options
*
* @return bool False if error uploading or invalid file, true otherwise
*/
function handle_upload() {
$file = $this->import_handle_upload();
 
if ( isset( $file['error'] ) ) {
echo '<p><strong>' . __( 'Sorry, there has been an error.', 'wordpress-importer' ) . '</strong><br />';
echo esc_html( $file['error'] ) . '</p>';
return false;
} else if ( ! file_exists( $file['file'] ) ) {
echo '<p><strong>' . __( 'Sorry, there has been an error.', 'wordpress-importer' ) . '</strong><br />';
printf( __( 'The export file could not be found at <code>%s</code>. It is likely that this was caused by a permissions problem.', 'wordpress-importer' ), esc_html( $file['file'] ) );
echo '</p>';
return false;
}
 
$this->id = (int) $file['id'];
$import_data = $this->parse( $file['file'] );
if ( is_wp_error( $import_data ) ) {
echo '<p><strong>' . __( 'Sorry, there has been an error.', 'wordpress-importer' ) . '</strong><br />';
echo esc_html( $import_data->get_error_message() ) . '</p>';
return false;
}
 
$this->version = $import_data['version'];
if ( $this->version > $this->max_wxr_version ) {
echo '<div class="error"><p><strong>';
printf( __( 'This WXR file (version %s) may not be supported by this version of the importer. Please consider updating.', 'wordpress-importer' ), esc_html($import_data['version']) );
echo '</strong></p></div>';
}
 
$this->get_authors_from_import( $import_data );
 
return true;
}
 
/**
* Retrieve authors from parsed WXR data
*
* Uses the provided author information from WXR 1.1 files
* or extracts info from each post for WXR 1.0 files
*
* @param array $import_data Data returned by a WXR parser
*/
function get_authors_from_import( $import_data ) {
if ( ! empty( $import_data['authors'] ) ) {
$this->authors = $import_data['authors'];
// no author information, grab it from the posts
} else {
foreach ( $import_data['posts'] as $post ) {
$login = sanitize_user( $post['post_author'], true );
if ( empty( $login ) ) {
printf( __( 'Failed to import author %s. Their posts will be attributed to the current user.', 'wordpress-importer' ), esc_html( $post['post_author'] ) );
echo '<br />';
continue;
}
 
if ( ! isset($this->authors[$login]) )
$this->authors[$login] = array(
'author_login' => $login,
'author_display_name' => $post['post_author']
);
}
}
}
 
/**
* Map old author logins to local user IDs based on decisions made
* in import options form. Can map to an existing user, create a new user
* or falls back to the current user in case of error with either of the previous
*/
function get_author_mapping( $map_users_id ) {
if ( empty( $this->authors ) )
return;
 
$create_users = $this->allow_create_users();
 
foreach ( (array) $this->authors as $i => $data ) {
 
$old_login = $data['author_login'];
 
// Multisite adds strtolower to sanitize_user. Need to sanitize here to stop breakage in process_posts.
$santized_old_login = sanitize_user( $old_login, true );
$old_id = isset( $this->authors[$old_login]['author_id'] ) ? intval($this->authors[$old_login]['author_id']) : false;
 
if ( ! $create_users ) {
$user = get_userdata( intval($map_users_id) );
if ( isset( $user->ID ) ) {
if ( $old_id )
$this->processed_authors[$old_id] = $user->ID;
$this->author_mapping[$santized_old_login] = $user->ID;
}
} else if ( $create_users ) {
if ( ! empty($this->authors[$i]) ) {
$user_id = wp_create_user( $this->authors[$i]['author_login'], wp_generate_password() );
} else if ( $this->version != '1.0' ) {
$user_data = array(
'user_login' => $old_login,
'user_pass' => wp_generate_password(),
'user_email' => isset( $this->authors[$old_login]['author_email'] ) ? $this->authors[$old_login]['author_email'] : '',
'display_name' => $this->authors[$old_login]['author_display_name'],
'first_name' => isset( $this->authors[$old_login]['author_first_name'] ) ? $this->authors[$old_login]['author_first_name'] : '',
'last_name' => isset( $this->authors[$old_login]['author_last_name'] ) ? $this->authors[$old_login]['author_last_name'] : '',
);
$user_id = wp_insert_user( $user_data );
}
 
if ( ! is_wp_error( $user_id ) ) {
if ( $old_id )
$this->processed_authors[$old_id] = $user_id;
$this->author_mapping[$santized_old_login] = $user_id;
} else {
printf( __( 'Failed to create new user for %s. Their posts will be attributed to the current user.', 'wordpress-importer' ), esc_html($this->authors[$old_login]['author_display_name']) );
if ( defined('IMPORT_DEBUG') && IMPORT_DEBUG )
echo ' ' . $user_id->get_error_message();
echo '<br />';
}
}
 
// failsafe: if the user_id was invalid, default to the current user
if ( ! isset( $this->author_mapping[$santized_old_login] ) ) {
if ( $old_id )
$this->processed_authors[$old_id] = (int) get_current_user_id();
$this->author_mapping[$santized_old_login] = (int) get_current_user_id();
}
}
}
 
/**
* Create new categories based on import information
*
* Doesn't create a new category if its slug already exists
*/
function process_categories() {
$this->categories = apply_filters( 'wp_import_categories', $this->categories );
 
if ( empty( $this->categories ) )
return;
 
foreach ( $this->categories as $cat ) {
// if the category already exists leave it alone
$term_id = term_exists( $cat['category_nicename'], 'category' );
if ( $term_id ) {
if ( is_array($term_id) ) $term_id = $term_id['term_id'];
if ( isset($cat['term_id']) )
$this->processed_terms[intval($cat['term_id'])] = (int) $term_id;
continue;
}
 
$category_parent = empty( $cat['category_parent'] ) ? 0 : category_exists( $cat['category_parent'] );
$category_description = isset( $cat['category_description'] ) ? $cat['category_description'] : '';
$catarr = array(
'category_nicename' => $cat['category_nicename'],
'category_parent' => $category_parent,
'cat_name' => $cat['cat_name'],
'category_description' => $category_description
);
 
$id = wp_insert_category( $catarr );
if ( ! is_wp_error( $id ) ) {
if ( isset($cat['term_id']) )
$this->processed_terms[intval($cat['term_id'])] = $id;
} else {
printf( __( 'Failed to import category %s', 'wordpress-importer' ), esc_html($cat['category_nicename']) );
if ( defined('IMPORT_DEBUG') && IMPORT_DEBUG )
echo ': ' . $id->get_error_message();
echo '<br />';
continue;
}
}
 
unset( $this->categories );
}
 
/**
* Create new post tags based on import information
*
* Doesn't create a tag if its slug already exists
*/
function process_tags() {
$this->tags = apply_filters( 'wp_import_tags', $this->tags );
 
if ( empty( $this->tags ) )
return;
 
foreach ( $this->tags as $tag ) {
// if the tag already exists leave it alone
$term_id = term_exists( $tag['tag_slug'], 'post_tag' );
if ( $term_id ) {
if ( is_array($term_id) ) $term_id = $term_id['term_id'];
if ( isset($tag['term_id']) )
$this->processed_terms[intval($tag['term_id'])] = (int) $term_id;
continue;
}
 
$tag_desc = isset( $tag['tag_description'] ) ? $tag['tag_description'] : '';
$tagarr = array( 'slug' => $tag['tag_slug'], 'description' => $tag_desc );
 
$id = wp_insert_term( $tag['tag_name'], 'post_tag', $tagarr );
if ( ! is_wp_error( $id ) ) {
if ( isset($tag['term_id']) )
$this->processed_terms[intval($tag['term_id'])] = $id['term_id'];
} else {
printf( __( 'Failed to import post tag %s', 'wordpress-importer' ), esc_html($tag['tag_name']) );
if ( defined('IMPORT_DEBUG') && IMPORT_DEBUG )
echo ': ' . $id->get_error_message();
echo '<br />';
continue;
}
}
 
unset( $this->tags );
}
 
/**
* Create new terms based on import information
*
* Doesn't create a term its slug already exists
*/
function process_terms() {
$this->terms = apply_filters( 'wp_import_terms', $this->terms );
 
if ( empty( $this->terms ) )
return;
 
foreach ( $this->terms as $term ) {
// if the term already exists in the correct taxonomy leave it alone
$term_id = term_exists( $term['slug'], $term['term_taxonomy'] );
if ( $term_id ) {
if ( is_array($term_id) ) $term_id = $term_id['term_id'];
if ( isset($term['term_id']) )
$this->processed_terms[intval($term['term_id'])] = (int) $term_id;
continue;
}
 
if ( empty( $term['term_parent'] ) ) {
$parent = 0;
} else {
$parent = term_exists( $term['term_parent'], $term['term_taxonomy'] );
if ( is_array( $parent ) ) $parent = $parent['term_id'];
}
$description = isset( $term['term_description'] ) ? $term['term_description'] : '';
$termarr = array( 'slug' => $term['slug'], 'description' => $description, 'parent' => intval($parent) );
 
$id = wp_insert_term( $term['term_name'], $term['term_taxonomy'], $termarr );
if ( ! is_wp_error( $id ) ) {
if ( isset($term['term_id']) )
$this->processed_terms[intval($term['term_id'])] = $id['term_id'];
} else {
printf( __( 'Failed to import %s %s', 'wordpress-importer' ), esc_html($term['term_taxonomy']), esc_html($term['term_name']) );
if ( defined('IMPORT_DEBUG') && IMPORT_DEBUG )
echo ': ' . $id->get_error_message();
echo '<br />';
continue;
}
}
 
unset( $this->terms );
}
 
/**
* Create new posts based on import information
*
* Posts marked as having a parent which doesn't exist will become top level items.
* Doesn't create a new post if: the post type doesn't exist, the given post ID
* is already noted as imported or a post with the same title and date already exists.
* Note that new/updated terms, comments and meta are imported for the last of the above.
*/
function process_posts() {
$this->posts = apply_filters( 'wp_import_posts', $this->posts );
 
foreach ( $this->posts as $post ) {
$post = apply_filters( 'wp_import_post_data_raw', $post );
 
if ( ! post_type_exists( $post['post_type'] ) ) {
printf( __( 'Failed to import &#8220;%s&#8221;: Invalid post type %s', 'wordpress-importer' ),
esc_html($post['post_title']), esc_html($post['post_type']) );
echo '<br />';
do_action( 'wp_import_post_exists', $post );
continue;
}
 
if ( isset( $this->processed_posts[$post['post_id']] ) && ! empty( $post['post_id'] ) )
continue;
 
if ( $post['status'] == 'auto-draft' )
continue;
 
if ( 'nav_menu_item' == $post['post_type'] ) {
$this->process_menu_item( $post );
continue;
}
 
$post_type_object = get_post_type_object( $post['post_type'] );
 
$post_exists = post_exists( $post['post_title'], '', $post['post_date'] );
if ( $post_exists && get_post_type( $post_exists ) == $post['post_type'] ) {
printf( __('%s &#8220;%s&#8221; already exists.', 'wordpress-importer'), $post_type_object->labels->singular_name, esc_html($post['post_title']) );
echo '<br />';
$comment_post_ID = $post_id = $post_exists;
} else {
$post_parent = (int) $post['post_parent'];
if ( $post_parent ) {
// if we already know the parent, map it to the new local ID
if ( isset( $this->processed_posts[$post_parent] ) ) {
$post_parent = $this->processed_posts[$post_parent];
// otherwise record the parent for later
} else {
$this->post_orphans[intval($post['post_id'])] = $post_parent;
$post_parent = 0;
}
}
 
// map the post author
$author = sanitize_user( $post['post_author'], true );
if ( isset( $this->author_mapping[$author] ) )
$author = $this->author_mapping[$author];
else
$author = (int) get_current_user_id();
 
$postdata = array(
'import_id' => $post['post_id'], 'post_author' => $author, 'post_date' => $post['post_date'],
'post_date_gmt' => $post['post_date_gmt'], 'post_content' => $post['post_content'],
'post_excerpt' => $post['post_excerpt'], 'post_title' => $post['post_title'],
'post_status' => $post['status'], 'post_name' => $post['post_name'],
'comment_status' => $post['comment_status'], 'ping_status' => $post['ping_status'],
'guid' => $post['guid'], 'post_parent' => $post_parent, 'menu_order' => $post['menu_order'],
'post_type' => $post['post_type'], 'post_password' => $post['post_password']
);
 
$original_post_ID = $post['post_id'];
$postdata = apply_filters( 'wp_import_post_data_processed', $postdata, $post );
 
if ( 'attachment' == $postdata['post_type'] ) {
$remote_url = ! empty($post['attachment_url']) ? $post['attachment_url'] : $post['guid'];
 
// try to use _wp_attached file for upload folder placement to ensure the same location as the export site
// e.g. location is 2003/05/image.jpg but the attachment post_date is 2010/09, see media_handle_upload()
$postdata['upload_date'] = $post['post_date'];
if ( isset( $post['postmeta'] ) ) {
foreach( $post['postmeta'] as $meta ) {
if ( $meta['key'] == '_wp_attached_file' ) {
if ( preg_match( '%^[0-9]{4}/[0-9]{2}%', $meta['value'], $matches ) )
$postdata['upload_date'] = $matches[0];
break;
}
}
}
 
$comment_post_ID = $post_id = $this->process_attachment( $postdata, $remote_url );
} else {
$comment_post_ID = $post_id = wp_insert_post( $postdata, true );
do_action( 'wp_import_insert_post', $post_id, $original_post_ID, $postdata, $post );
}
 
if ( is_wp_error( $post_id ) ) {
printf( __( 'Failed to import %s &#8220;%s&#8221;', 'wordpress-importer' ),
$post_type_object->labels->singular_name, esc_html($post['post_title']) );
if ( defined('IMPORT_DEBUG') && IMPORT_DEBUG )
echo ': ' . $post_id->get_error_message();
echo '<br />';
continue;
}
 
if ( $post['is_sticky'] == 1 )
stick_post( $post_id );
}
 
// map pre-import ID to local ID
$this->processed_posts[intval($post['post_id'])] = (int) $post_id;
 
if ( ! isset( $post['terms'] ) )
$post['terms'] = array();
 
$post['terms'] = apply_filters( 'wp_import_post_terms', $post['terms'], $post_id, $post );
 
// add categories, tags and other terms
if ( ! empty( $post['terms'] ) ) {
$terms_to_set = array();
foreach ( $post['terms'] as $term ) {
// back compat with WXR 1.0 map 'tag' to 'post_tag'
$taxonomy = ( 'tag' == $term['domain'] ) ? 'post_tag' : $term['domain'];
$term_exists = term_exists( $term['slug'], $taxonomy );
$term_id = is_array( $term_exists ) ? $term_exists['term_id'] : $term_exists;
if ( ! $term_id ) {
$t = wp_insert_term( $term['name'], $taxonomy, array( 'slug' => $term['slug'] ) );
if ( ! is_wp_error( $t ) ) {
$term_id = $t['term_id'];
do_action( 'wp_import_insert_term', $t, $term, $post_id, $post );
} else {
printf( __( 'Failed to import %s %s', 'wordpress-importer' ), esc_html($taxonomy), esc_html($term['name']) );
if ( defined('IMPORT_DEBUG') && IMPORT_DEBUG )
echo ': ' . $t->get_error_message();
echo '<br />';
do_action( 'wp_import_insert_term_failed', $t, $term, $post_id, $post );
continue;
}
}
$terms_to_set[$taxonomy][] = intval( $term_id );
}
 
foreach ( $terms_to_set as $tax => $ids ) {
$tt_ids = wp_set_post_terms( $post_id, $ids, $tax );
do_action( 'wp_import_set_post_terms', $tt_ids, $ids, $tax, $post_id, $post );
}
unset( $post['terms'], $terms_to_set );
}
 
if ( ! isset( $post['comments'] ) )
$post['comments'] = array();
 
$post['comments'] = apply_filters( 'wp_import_post_comments', $post['comments'], $post_id, $post );
 
// add/update comments
if ( ! empty( $post['comments'] ) ) {
$num_comments = 0;
$inserted_comments = array();
foreach ( $post['comments'] as $comment ) {
$comment_id = $comment['comment_id'];
$newcomments[$comment_id]['comment_post_ID'] = $comment_post_ID;
$newcomments[$comment_id]['comment_author'] = $comment['comment_author'];
$newcomments[$comment_id]['comment_author_email'] = $comment['comment_author_email'];
$newcomments[$comment_id]['comment_author_IP'] = $comment['comment_author_IP'];
$newcomments[$comment_id]['comment_author_url'] = $comment['comment_author_url'];
$newcomments[$comment_id]['comment_date'] = $comment['comment_date'];
$newcomments[$comment_id]['comment_date_gmt'] = $comment['comment_date_gmt'];
$newcomments[$comment_id]['comment_content'] = $comment['comment_content'];
$newcomments[$comment_id]['comment_approved'] = $comment['comment_approved'];
$newcomments[$comment_id]['comment_type'] = $comment['comment_type'];
$newcomments[$comment_id]['comment_parent'] = $comment['comment_parent'];
$newcomments[$comment_id]['commentmeta'] = isset( $comment['commentmeta'] ) ? $comment['commentmeta'] : array();
if ( isset( $this->processed_authors[$comment['comment_user_id']] ) )
$newcomments[$comment_id]['user_id'] = $this->processed_authors[$comment['comment_user_id']];
}
ksort( $newcomments );
 
foreach ( $newcomments as $key => $comment ) {
// if this is a new post we can skip the comment_exists() check
if ( ! $post_exists || ! comment_exists( $comment['comment_author'], $comment['comment_date'] ) ) {
if ( isset( $inserted_comments[$comment['comment_parent']] ) )
$comment['comment_parent'] = $inserted_comments[$comment['comment_parent']];
$comment = wp_filter_comment( $comment );
$inserted_comments[$key] = wp_insert_comment( $comment );
do_action( 'wp_import_insert_comment', $inserted_comments[$key], $comment, $comment_post_ID, $post );
 
foreach( $comment['commentmeta'] as $meta ) {
$value = maybe_unserialize( $meta['value'] );
add_comment_meta( $inserted_comments[$key], $meta['key'], $value );
}
 
$num_comments++;
}
}
unset( $newcomments, $inserted_comments, $post['comments'] );
}
 
if ( ! isset( $post['postmeta'] ) )
$post['postmeta'] = array();
 
$post['postmeta'] = apply_filters( 'wp_import_post_meta', $post['postmeta'], $post_id, $post );
 
// add/update post meta
if ( ! empty( $post['postmeta'] ) ) {
foreach ( $post['postmeta'] as $meta ) {
$key = apply_filters( 'import_post_meta_key', $meta['key'], $post_id, $post );
$value = false;
 
if ( '_edit_last' == $key ) {
if ( isset( $this->processed_authors[intval($meta['value'])] ) )
$value = $this->processed_authors[intval($meta['value'])];
else
$key = false;
}
 
if ( $key ) {
// export gets meta straight from the DB so could have a serialized string
if ( ! $value )
$value = maybe_unserialize( $meta['value'] );
 
add_post_meta( $post_id, $key, $value );
do_action( 'import_post_meta', $post_id, $key, $value );
 
// if the post has a featured image, take note of this in case of remap
if ( '_thumbnail_id' == $key )
$this->featured_images[$post_id] = (int) $value;
}
}
}
}
 
unset( $this->posts );
}
 
/**
* Attempt to create a new menu item from import data
*
* Fails for draft, orphaned menu items and those without an associated nav_menu
* or an invalid nav_menu term. If the post type or term object which the menu item
* represents doesn't exist then the menu item will not be imported (waits until the
* end of the import to retry again before discarding).
*
* @param array $item Menu item details from WXR file
*/
function process_menu_item( $item ) {
// skip draft, orphaned menu items
if ( 'draft' == $item['status'] )
return;
 
$menu_slug = false;
if ( isset($item['terms']) ) {
// loop through terms, assume first nav_menu term is correct menu
foreach ( $item['terms'] as $term ) {
if ( 'nav_menu' == $term['domain'] ) {
$menu_slug = $term['slug'];
break;
}
}
}
 
// no nav_menu term associated with this menu item
if ( ! $menu_slug ) {
_e( 'Menu item skipped due to missing menu slug', 'wordpress-importer' );
echo '<br />';
return;
}
 
$menu_id = term_exists( $menu_slug, 'nav_menu' );
if ( ! $menu_id ) {
printf( __( 'Menu item skipped due to invalid menu slug: %s', 'wordpress-importer' ), esc_html( $menu_slug ) );
echo '<br />';
return;
} else {
$menu_id = is_array( $menu_id ) ? $menu_id['term_id'] : $menu_id;
}
 
foreach ( $item['postmeta'] as $meta )
$$meta['key'] = $meta['value'];
 
if ( 'taxonomy' == $_menu_item_type && isset( $this->processed_terms[intval($_menu_item_object_id)] ) ) {
$_menu_item_object_id = $this->processed_terms[intval($_menu_item_object_id)];
} else if ( 'post_type' == $_menu_item_type && isset( $this->processed_posts[intval($_menu_item_object_id)] ) ) {
$_menu_item_object_id = $this->processed_posts[intval($_menu_item_object_id)];
} else if ( 'custom' != $_menu_item_type ) {
// associated object is missing or not imported yet, we'll retry later
$this->missing_menu_items[] = $item;
return;
}
 
if ( isset( $this->processed_menu_items[intval($_menu_item_menu_item_parent)] ) ) {
$_menu_item_menu_item_parent = $this->processed_menu_items[intval($_menu_item_menu_item_parent)];
} else if ( $_menu_item_menu_item_parent ) {
$this->menu_item_orphans[intval($item['post_id'])] = (int) $_menu_item_menu_item_parent;
$_menu_item_menu_item_parent = 0;
}
 
// wp_update_nav_menu_item expects CSS classes as a space separated string
$_menu_item_classes = maybe_unserialize( $_menu_item_classes );
if ( is_array( $_menu_item_classes ) )
$_menu_item_classes = implode( ' ', $_menu_item_classes );
 
$args = array(
'menu-item-object-id' => $_menu_item_object_id,
'menu-item-object' => $_menu_item_object,
'menu-item-parent-id' => $_menu_item_menu_item_parent,
'menu-item-position' => intval( $item['menu_order'] ),
'menu-item-type' => $_menu_item_type,
'menu-item-title' => $item['post_title'],
'menu-item-url' => $_menu_item_url,
'menu-item-description' => $item['post_content'],
'menu-item-attr-title' => $item['post_excerpt'],
'menu-item-target' => $_menu_item_target,
'menu-item-classes' => $_menu_item_classes,
'menu-item-xfn' => $_menu_item_xfn,
'menu-item-status' => $item['status']
);
 
$id = wp_update_nav_menu_item( $menu_id, 0, $args );
if ( $id && ! is_wp_error( $id ) )
$this->processed_menu_items[intval($item['post_id'])] = (int) $id;
}
 
/**
* If fetching attachments is enabled then attempt to create a new attachment
*
* @param array $post Attachment post details from WXR
* @param string $url URL to fetch attachment from
* @return int|WP_Error Post ID on success, WP_Error otherwise
*/
function process_attachment( $post, $url ) {
if ( ! $this->fetch_attachments )
return new WP_Error( 'attachment_processing_error',
__( 'Fetching attachments is not enabled', 'wordpress-importer' ) );
 
// if the URL is absolute, but does not contain address, then upload it assuming base_site_url
if ( preg_match( '|^/[\w\W]+$|', $url ) )
$url = rtrim( $this->base_url, '/' ) . $url;
 
$upload = $this->fetch_remote_file( $url, $post );
if ( is_wp_error( $upload ) )
return $upload;
 
if ( $info = wp_check_filetype( $upload['file'] ) )
$post['post_mime_type'] = $info['type'];
else
return new WP_Error( 'attachment_processing_error', __('Invalid file type', 'wordpress-importer') );
 
$post['guid'] = $upload['url'];
 
// as per wp-admin/includes/upload.php
$post_id = wp_insert_attachment( $post, $upload['file'] );
wp_update_attachment_metadata( $post_id, wp_generate_attachment_metadata( $post_id, $upload['file'] ) );
 
// remap resized image URLs, works by stripping the extension and remapping the URL stub.
if ( preg_match( '!^image/!', $info['type'] ) ) {
$parts = pathinfo( $url );
$name = basename( $parts['basename'], ".{$parts['extension']}" ); // PATHINFO_FILENAME in PHP 5.2
 
$parts_new = pathinfo( $upload['url'] );
$name_new = basename( $parts_new['basename'], ".{$parts_new['extension']}" );
 
$this->url_remap[$parts['dirname'] . '/' . $name] = $parts_new['dirname'] . '/' . $name_new;
}
 
return $post_id;
}
 
/**
* Attempt to download a remote file attachment
*
* @param string $url URL of item to fetch
* @param array $post Attachment details
* @return array|WP_Error Local file location details on success, WP_Error otherwise
*/
function fetch_remote_file( $url, $post ) {
// extract the file name and extension from the url
$file_name = basename( $url );
 
// get placeholder file in the upload dir with a unique, sanitized filename
$upload = wp_upload_bits( $file_name, 0, '', $post['upload_date'] );
if ( $upload['error'] )
return new WP_Error( 'upload_dir_error', $upload['error'] );
 
// fetch the remote url and write it to the placeholder file
$headers = wp_get_http( $url, $upload['file'] );
 
// request failed
if ( ! $headers ) {
@unlink( $upload['file'] );
return new WP_Error( 'import_file_error', __('Remote server did not respond', 'wordpress-importer') );
}
 
// make sure the fetch was successful
if ( $headers['response'] != '200' ) {
@unlink( $upload['file'] );
return new WP_Error( 'import_file_error', sprintf( __('Remote server returned error response %1$d %2$s', 'wordpress-importer'), esc_html($headers['response']), get_status_header_desc($headers['response']) ) );
}
 
$filesize = filesize( $upload['file'] );
 
if ( isset( $headers['content-length'] ) && $filesize != $headers['content-length'] ) {
@unlink( $upload['file'] );
return new WP_Error( 'import_file_error', __('Remote file is incorrect size', 'wordpress-importer') );
}
 
if ( 0 == $filesize ) {
@unlink( $upload['file'] );
return new WP_Error( 'import_file_error', __('Zero size file downloaded', 'wordpress-importer') );
}
 
$max_size = (int) $this->max_attachment_size();
if ( ! empty( $max_size ) && $filesize > $max_size ) {
@unlink( $upload['file'] );
return new WP_Error( 'import_file_error', sprintf(__('Remote file is too large, limit is %s', 'wordpress-importer'), size_format($max_size) ) );
}
 
// keep track of the old and new urls so we can substitute them later
$this->url_remap[$url] = $upload['url'];
$this->url_remap[$post['guid']] = $upload['url']; // r13735, really needed?
// keep track of the destination if the remote url is redirected somewhere else
if ( isset($headers['x-final-location']) && $headers['x-final-location'] != $url )
$this->url_remap[$headers['x-final-location']] = $upload['url'];
 
return $upload;
}
 
/**
* Attempt to associate posts and menu items with previously missing parents
*
* An imported post's parent may not have been imported when it was first created
* so try again. Similarly for child menu items and menu items which were missing
* the object (e.g. post) they represent in the menu
*/
function backfill_parents() {
global $wpdb;
 
// find parents for post orphans
foreach ( $this->post_orphans as $child_id => $parent_id ) {
$local_child_id = $local_parent_id = false;
if ( isset( $this->processed_posts[$child_id] ) )
$local_child_id = $this->processed_posts[$child_id];
if ( isset( $this->processed_posts[$parent_id] ) )
$local_parent_id = $this->processed_posts[$parent_id];
 
if ( $local_child_id && $local_parent_id )
$wpdb->update( $wpdb->posts, array( 'post_parent' => $local_parent_id ), array( 'ID' => $local_child_id ), '%d', '%d' );
}
 
// all other posts/terms are imported, retry menu items with missing associated object
$missing_menu_items = $this->missing_menu_items;
foreach ( $missing_menu_items as $item )
$this->process_menu_item( $item );
 
// find parents for menu item orphans
foreach ( $this->menu_item_orphans as $child_id => $parent_id ) {
$local_child_id = $local_parent_id = 0;
if ( isset( $this->processed_menu_items[$child_id] ) )
$local_child_id = $this->processed_menu_items[$child_id];
if ( isset( $this->processed_menu_items[$parent_id] ) )
$local_parent_id = $this->processed_menu_items[$parent_id];
 
if ( $local_child_id && $local_parent_id )
update_post_meta( $local_child_id, '_menu_item_menu_item_parent', (int) $local_parent_id );
}
}
 
/**
* Use stored mapping information to update old attachment URLs
*/
function backfill_attachment_urls() {
global $wpdb;
// make sure we do the longest urls first, in case one is a substring of another
uksort( $this->url_remap, array(&$this, 'cmpr_strlen') );
 
foreach ( $this->url_remap as $from_url => $to_url ) {
// remap urls in post_content
$wpdb->query( $wpdb->prepare("UPDATE {$wpdb->posts} SET post_content = REPLACE(post_content, %s, %s)", $from_url, $to_url) );
// remap enclosure urls
$result = $wpdb->query( $wpdb->prepare("UPDATE {$wpdb->postmeta} SET meta_value = REPLACE(meta_value, %s, %s) WHERE meta_key='enclosure'", $from_url, $to_url) );
}
}
 
/**
* Update _thumbnail_id meta to new, imported attachment IDs
*/
function remap_featured_images() {
// cycle through posts that have a featured image
foreach ( $this->featured_images as $post_id => $value ) {
if ( isset( $this->processed_posts[$value] ) ) {
$new_id = $this->processed_posts[$value];
// only update if there's a difference
if ( $new_id != $value )
update_post_meta( $post_id, '_thumbnail_id', $new_id );
}
}
}
 
/**
* Parse a WXR file
*
* @param string $file Path to WXR file for parsing
* @return array Information gathered from the WXR file
*/
function parse( $file ) {
$parser = new WXR_Parser();
return $parser->parse( $file );
}
 
/**
* Decide if the given meta key maps to information we will want to import
*
* @param string $key The meta key to check
* @return string|bool The key if we do want to import, false if not
*/
function is_valid_meta_key( $key ) {
// skip attachment metadata since we'll regenerate it from scratch
// skip _edit_lock as not relevant for import
if ( in_array( $key, array( '_wp_attached_file', '_wp_attachment_metadata', '_edit_lock' ) ) )
return false;
return $key;
}
 
/**
* Decide whether or not the importer is allowed to create users.
* Default is true, can be filtered via import_allow_create_users
*
* @return bool True if creating users is allowed
*/
function allow_create_users() {
return apply_filters( 'import_allow_create_users', true );
}
 
/**
* Decide whether or not the importer should attempt to download attachment files.
* Default is true, can be filtered via import_allow_fetch_attachments. The choice
* made at the import options screen must also be true, false here hides that checkbox.
*
* @return bool True if downloading attachments is allowed
*/
function allow_fetch_attachments() {
return apply_filters( 'import_allow_fetch_attachments', true );
}
 
/**
* Decide what the maximum file size for downloaded attachments is.
* Default is 0 (unlimited), can be filtered via import_attachment_size_limit
*
* @return int Maximum attachment file size to import
*/
function max_attachment_size() {
return apply_filters( 'import_attachment_size_limit', 0 );
}
 
/**
* Added to http_request_timeout filter to force timeout at 60 seconds during import
* @return int 60
*/
function bump_request_timeout() {
return 60;
}
 
// return the difference in length between two strings
function cmpr_strlen( $a, $b ) {
return strlen($b) - strlen($a);
}
}
} // end class_exists
 
function auto_import( $args ) {
 
$defaults = array( 'file' => '', 'map_user_id' => 0);
$args = wp_parse_args( $args, $defaults );
 
$autoimport = new Auto_Importer( $args );
$autoimport->do_import();
 
}
functions.php
PHP
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
/**
* Auto import a XML file
*/
add_action( 'after_setup_theme', 'autoimport' );
 
function autoimport() {
// get the file
require_once TEMPLATEPATH . '/autoimport/autoimporter.php';
 
// call the function
$args = array(
'file' => TEMPLATEPATH . '/autoimport/import.xml',
'map_user_id' => 1
);
 
auto_import( $args );
 
}

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