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<?php
/**
* WordPress eXtended RSS file parser implementations
*
* @package WordPress
* @subpackage Importer
*/
use WordPress\ByteStream\ReadStream\FileReadStream;
/**
* WXR Parser that uses the XMLProcessor component.
*/
class WXR_Parser_XML_Processor {
public $authors = array();
public $posts = array();
public $categories = array();
public $tags = array();
public $terms = array();
public $base_url = '';
public $base_blog_url = '';
/**
* Parse a WXR file
*
* @param string $file Path to WXR file
* @return array|WP_Error Parsed data or error object
*/
public function parse( $file ) {
// Trigger a warning for non-existent files to match legacy behavior and tests.
if ( ! is_readable( $file ) ) {
// Intentionally trigger a PHP warning; return value is ignored.
file_get_contents( $file );
}
// Initialize variables
$this->authors = array();
$this->posts = array();
$this->categories = array();
$this->tags = array();
$this->terms = array();
$this->base_url = '';
$this->base_blog_url = '';
$wxr_version = '';
try {
$reader = $this->create_wxr_entity_reader( $file );
// Parse the XML document
$last_term = null;
while ( $reader->next_entity() ) {
$entity = $reader->get_entity();
$trimmed_data = array();
foreach ( $entity->get_data() as $k => $v ) {
if ( ! is_string( $v ) ) {
$trimmed_data[ $k ] = $v;
continue;
}
$trimmed_data[ $k ] = $v;
}
switch ( $entity->get_type() ) {
case 'wxr_version':
$wxr_version = $trimmed_data['wxr_version'];
break;
case 'site_option':
if ( isset( $trimmed_data['option_name'], $trimmed_data['option_value'] ) ) {
switch ( $trimmed_data['option_name'] ) {
case 'wxr_version':
$wxr_version = $trimmed_data['option_value'];
break;
case 'siteurl':
$this->base_url = $trimmed_data['option_value'];
break;
case 'home':
$this->base_blog_url = $trimmed_data['option_value'];
break;
}
}
break;
case 'user':
$key = isset( $trimmed_data['author_login'] ) ? $trimmed_data['author_login'] : (
isset( $trimmed_data['author_email'] ) ? $trimmed_data['author_email'] : (
isset( $trimmed_data['author_id'] ) ? $trimmed_data['author_id'] : count( $this->authors )
)
);
$this->authors[ $key ] = $trimmed_data;
break;
case 'post':
$this->posts[] = $trimmed_data;
break;
case 'post_meta':
$last_post_key = count( $this->posts ) - 1;
if ( ! isset( $this->posts[ $last_post_key ]['postmeta'] ) ) {
$this->posts[ $last_post_key ]['postmeta'] = array();
}
// Ensure only expected keys 'key' and 'value' are present to match tests
if ( isset( $trimmed_data['post_id'] ) ) {
unset( $trimmed_data['post_id'] );
}
$this->posts[ $last_post_key ]['postmeta'][] = $trimmed_data;
break;
case 'comment':
$last_post_key = count( $this->posts ) - 1;
if ( ! isset( $this->posts[ $last_post_key ]['comments'] ) ) {
$this->posts[ $last_post_key ]['comments'] = array();
}
$trimmed_data['commentmeta'] = array();
$this->posts[ $last_post_key ]['comments'][] = $trimmed_data;
break;
case 'comment_meta':
$last_post_key = count( $this->posts ) - 1;
$last_comment_index = count( $this->posts[ $last_post_key ]['comments'] ) - 1;
if ( $last_comment_index >= 0 ) {
// Do not include comment_id in the final commentmeta array to match expected shape.
if ( isset( $trimmed_data['comment_id'] ) ) {
unset( $trimmed_data['comment_id'] );
}
$this->posts[ $last_post_key ]['comments'][ $last_comment_index ]['commentmeta'][] = $trimmed_data;
}
break;
case 'category':
if ( isset( $trimmed_data['term_id'] ) ) {
$trimmed_data['term_id'] = (int) $trimmed_data['term_id'];
}
unset( $trimmed_data['taxonomy'], $trimmed_data['term_description'] );
$this->categories[] = $trimmed_data;
$last_term_index = count( $this->categories ) - 1;
$last_term = &$this->categories[ $last_term_index ];
break;
case 'tag':
if ( isset( $trimmed_data['term_id'] ) ) {
$trimmed_data['term_id'] = (int) $trimmed_data['term_id'];
}
unset( $trimmed_data['taxonomy'], $trimmed_data['term_description'] );
$this->tags[] = $trimmed_data;
$last_term_index = count( $this->tags ) - 1;
$last_term = &$this->tags[ $last_term_index ];
break;
case 'term':
if ( isset( $trimmed_data['term_id'] ) ) {
$trimmed_data['term_id'] = (int) $trimmed_data['term_id'];
}
// unset($trimmed_data['taxonomy'], $trimmed_data['term_description']);
// $trimmed_data['taxonomy'] id 'domain'
// $trimmed_data['slug'] id 'nicename'
$this->terms[] = $trimmed_data;
$last_term_index = count( $this->terms ) - 1;
$last_term = &$this->terms[ $last_term_index ];
break;
case 'termmeta':
case 'term_meta':
if ( ! isset( $last_term['termmeta'] ) ) {
$last_term['termmeta'] = array();
}
$last_term['termmeta'][] = $trimmed_data;
break;
case 'wxr_version':
// Support entity-style wxr_version array or raw string
if ( isset( $trimmed_data['wxr_version'] ) ) {
$wxr_version = $trimmed_data['wxr_version'];
} else {
$wxr_version = $trimmed_data;
}
break;
default:
// Ignore unknown entity types silently to avoid emitting notices.
break;
}
}
} catch ( Exception $e ) {
return new WP_Error( 'WXR_parse_error', $e->getMessage() );
}
// Normalize per-post terms to legacy shape { domain, slug, name } when needed.
foreach ( $this->posts as $idx => $post ) {
if ( isset( $post['terms'] ) && is_array( $post['terms'] ) ) {
foreach ( $post['terms'] as $tidx => $term ) {
if ( ! isset( $term['domain'] ) && isset( $term['taxonomy'] ) ) {
$mapped = array(
'domain' => $term['taxonomy'],
'slug' => isset( $term['slug'] ) ? $term['slug'] : '',
'name' => isset( $term['description'] ) ? $term['description'] : '',
);
$this->posts[ $idx ]['terms'][ $tidx ] = $mapped;
}
}
}
}
// Validate WXR version
if ( empty( $wxr_version ) || ! preg_match( '/^\d+\.\d+$/', $wxr_version ) ) {
return new WP_Error( 'WXR_parse_error', __( 'This does not appear to be a WXR file, missing/invalid WXR version number', 'wordpress-importer' ) );
}
return array(
'authors' => $this->authors,
'posts' => $this->posts,
'categories' => $this->categories,
'tags' => $this->tags,
'terms' => $this->terms,
'base_url' => $this->base_url,
'base_blog_url' => $this->base_blog_url,
'version' => $wxr_version,
);
}
private function create_wxr_entity_reader( $file ) {
// Every XML element is a combination of a long-form namespace and a
// local element name, e.g. a syntax <wp:post_id> could actually refer
// to a (https://wordpress.org/export/1.0/, post_id) element.
//
// Namespaces are paramount for parsing XML and cannot be ignored. Elements
// element must be matched based on both their namespace and local name.
//
// Unfortunately, different WXR files defined the `wp` namespace in a different way.
// Folks use a mixture of HTTP vs HTTPS protocols and version numbers. We must
// account for all possible options to parse these documents correctly.
$wxr_namespaces = array(
'http://wordpress.org/export/1.0/',
'https://wordpress.org/export/1.0/',
'http://wordpress.org/export/1.1/',
'https://wordpress.org/export/1.1/',
'http://wordpress.org/export/1.2/',
'https://wordpress.org/export/1.2/',
);
$known_entities = array(
'item' => array(
'type' => 'post',
'fields' => array(
'title' => 'post_title',
'guid' => 'guid',
'description' => 'post_excerpt',
'{http://purl.org/dc/elements/1.1/}creator' => 'post_author',
'{http://purl.org/rss/1.0/modules/content/}encoded' => 'post_content',
'{http://wordpress.org/export/1.0/excerpt/}encoded' => 'post_excerpt',
'{http://wordpress.org/export/1.1/excerpt/}encoded' => 'post_excerpt',
'{http://wordpress.org/export/1.2/excerpt/}encoded' => 'post_excerpt',
),
),
);
$known_site_options = array();
foreach ( $wxr_namespaces as $wxr_namespace ) {
$known_site_options = array_merge(
$known_site_options,
array(
'{' . $wxr_namespace . '}base_blog_url' => 'home',
'{' . $wxr_namespace . '}base_site_url' => 'siteurl',
'{' . $wxr_namespace . '}wxr_version' => 'wxr_version',
'title' => 'blogname',
)
);
$known_entities['item']['fields'] = array_merge(
$known_entities['item']['fields'],
array(
'{' . $wxr_namespace . '}post_id' => 'post_id',
'{' . $wxr_namespace . '}status' => 'status',
'{' . $wxr_namespace . '}post_date' => 'post_date',
'{' . $wxr_namespace . '}post_date_gmt' => 'post_date_gmt',
'{' . $wxr_namespace . '}post_modified' => 'post_modified',
'{' . $wxr_namespace . '}post_modified_gmt' => 'post_modified_gmt',
'{' . $wxr_namespace . '}comment_status' => 'comment_status',
'{' . $wxr_namespace . '}ping_status' => 'ping_status',
'{' . $wxr_namespace . '}post_name' => 'post_name',
'{' . $wxr_namespace . '}post_parent' => 'post_parent',
'{' . $wxr_namespace . '}menu_order' => 'menu_order',
'{' . $wxr_namespace . '}post_type' => 'post_type',
'{' . $wxr_namespace . '}post_password' => 'post_password',
'{' . $wxr_namespace . '}is_sticky' => 'is_sticky',
'{' . $wxr_namespace . '}attachment_url' => 'attachment_url',
)
);
$known_entities = array_merge(
$known_entities,
array(
'{' . $wxr_namespace . '}comment' => array(
'type' => 'comment',
'fields' => array(
'{' . $wxr_namespace . '}comment_id' => 'comment_id',
'{' . $wxr_namespace . '}comment_author' => 'comment_author',
'{' . $wxr_namespace . '}comment_author_email' => 'comment_author_email',
'{' . $wxr_namespace . '}comment_author_url' => 'comment_author_url',
'{' . $wxr_namespace . '}comment_author_IP' => 'comment_author_IP',
'{' . $wxr_namespace . '}comment_date' => 'comment_date',
'{' . $wxr_namespace . '}comment_date_gmt' => 'comment_date_gmt',
'{' . $wxr_namespace . '}comment_content' => 'comment_content',
'{' . $wxr_namespace . '}comment_approved' => 'comment_approved',
'{' . $wxr_namespace . '}comment_type' => 'comment_type',
'{' . $wxr_namespace . '}comment_parent' => 'comment_parent',
'{' . $wxr_namespace . '}comment_user_id' => 'comment_user_id',
),
),
'{' . $wxr_namespace . '}commentmeta' => array(
'type' => 'comment_meta',
'fields' => array(
'{' . $wxr_namespace . '}meta_key' => 'key',
'{' . $wxr_namespace . '}meta_value' => 'value',
),
),
'{' . $wxr_namespace . '}author' => array(
'type' => 'user',
'fields' => array(
'{' . $wxr_namespace . '}author_id' => 'author_id',
'{' . $wxr_namespace . '}author_login' => 'author_login',
'{' . $wxr_namespace . '}author_email' => 'author_email',
'{' . $wxr_namespace . '}author_display_name' => 'author_display_name',
'{' . $wxr_namespace . '}author_first_name' => 'author_first_name',
'{' . $wxr_namespace . '}author_last_name' => 'author_last_name',
),
),
'{' . $wxr_namespace . '}postmeta' => array(
'type' => 'post_meta',
'fields' => array(
'{' . $wxr_namespace . '}meta_key' => 'key',
'{' . $wxr_namespace . '}meta_value' => 'value',
),
),
'{' . $wxr_namespace . '}term' => array(
'type' => 'term',
'fields' => array(
'{' . $wxr_namespace . '}term_id' => 'term_id',
'{' . $wxr_namespace . '}term_taxonomy' => 'term_taxonomy',
'{' . $wxr_namespace . '}term_slug' => 'slug',
'{' . $wxr_namespace . '}term_parent' => 'term_parent',
'{' . $wxr_namespace . '}term_name' => 'term_name',
'{' . $wxr_namespace . '}term_description' => 'term_description',
),
),
'{' . $wxr_namespace . '}termmeta' => array(
'type' => 'term_meta',
'fields' => array(
'{' . $wxr_namespace . '}meta_key' => 'key',
'{' . $wxr_namespace . '}meta_value' => 'value',
),
),
'{' . $wxr_namespace . '}tag' => array(
'type' => 'tag',
'fields' => array(
'{' . $wxr_namespace . '}term_id' => 'term_id',
'{' . $wxr_namespace . '}tag_slug' => 'tag_slug',
'{' . $wxr_namespace . '}tag_name' => 'tag_name',
'{' . $wxr_namespace . '}tag_description' => 'tag_description',
),
),
'{' . $wxr_namespace . '}category' => array(
'type' => 'category',
'fields' => array(
'{' . $wxr_namespace . '}term_id' => 'term_id',
'{' . $wxr_namespace . '}category_nicename' => 'category_nicename',
'{' . $wxr_namespace . '}category_parent' => 'category_parent',
'{' . $wxr_namespace . '}cat_name' => 'cat_name',
'{' . $wxr_namespace . '}category_description' => 'category_description',
),
),
)
);
}
return WordPress\DataLiberation\EntityReader\WXREntityReader::create(
FileReadStream::from_path( $file ),
null,
array(
'known_site_options' => $known_site_options,
'known_entities' => $known_entities,
'use_legacy_post_term_keys' => true,
'remap_wp_author' => false,
)
);
}
}