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   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   */
  16  define( 'WXR_VERSION', '1.1' );
  17  
  18  /**
  19   * Generates the WXR export file for download
  20   *
  21   * @since 2.1.0
  22   *
  23   * @param array $args Filters defining what should be included in the export
  24   */
  25  function export_wp( $args = array() ) {
  26      global $wpdb, $post;
  27  
  28      $defaults = array( 'content' => 'all', 'author' => false, 'category' => false,
  29          'start_date' => false, 'end_date' => false, 'status' => false,
  30      );
  31      $args = wp_parse_args( $args, $defaults );
  32  
  33      do_action( 'export_wp' );
  34  
  35      $sitename = sanitize_key( get_bloginfo( 'name' ) );
  36      if ( ! empty($sitename) ) $sitename .= '.';
  37      $filename = $sitename . 'wordpress.' . date( 'Y-m-d' ) . '.xml';
  38  
  39      header( 'Content-Description: File Transfer' );
  40      header( 'Content-Disposition: attachment; filename=' . $filename );
  41      header( 'Content-Type: text/xml; charset=' . get_option( 'blog_charset' ), true );
  42  
  43      if ( 'all' != $args['content'] && post_type_exists( $args['content'] ) ) {
  44          $ptype = get_post_type_object( $args['content'] );
  45          if ( ! $ptype->can_export )
  46              $args['content'] = 'post';
  47  
  48          $where = $wpdb->prepare( "{$wpdb->posts}.post_type = %s", $args['content'] );
  49      } else {
  50          $post_types = get_post_types( array( 'can_export' => true ) );
  51          $esses = array_fill( 0, count($post_types), '%s' );
  52          $where = $wpdb->prepare( "{$wpdb->posts}.post_type IN (" . implode( ',', $esses ) . ')', $post_types );
  53      }
  54  
  55      if ( $args['status'] && ( 'post' == $args['content'] || 'page' == $args['content'] ) )
  56          $where .= $wpdb->prepare( " AND {$wpdb->posts}.post_status = %s", $args['status'] );
  57      else
  58          $where .= " AND {$wpdb->posts}.post_status != 'auto-draft'";
  59  
  60      $join = '';
  61      if ( $args['category'] && 'post' == $args['content'] ) {
  62          if ( $term = term_exists( $args['category'], 'category' ) ) {
  63              $join = "INNER JOIN {$wpdb->term_relationships} ON ({$wpdb->posts}.ID = {$wpdb->term_relationships}.object_id)";
  64              $where .= $wpdb->prepare( " AND {$wpdb->term_relationships}.term_taxonomy_id = %d", $term['term_taxonomy_id'] );
  65          }
  66      }
  67  
  68      if ( 'post' == $args['content'] || 'page' == $args['content'] ) {
  69          if ( $args['author'] )
  70              $where .= $wpdb->prepare( " AND {$wpdb->posts}.post_author = %d", $args['author'] );
  71  
  72          if ( $args['start_date'] )
  73              $where .= $wpdb->prepare( " AND {$wpdb->posts}.post_date >= %s", date( 'Y-m-d', strtotime($args['start_date']) ) );
  74  
  75          if ( $args['end_date'] )
  76              $where .= $wpdb->prepare( " AND {$wpdb->posts}.post_date < %s", date( 'Y-m-d', strtotime('+1 month', strtotime($args['end_date'])) ) );
  77      }
  78  
  79      // grab a snapshot of post IDs, just in case it changes during the export
  80      $post_ids = $wpdb->get_col( "SELECT ID FROM {$wpdb->posts} $join WHERE $where" );
  81  
  82      // get the requested terms ready, empty unless posts filtered by category or all content
  83      $cats = $tags = $terms = array();
  84      if ( isset( $term ) && $term ) {
  85          $cat = get_term( $term['term_id'], 'category' );
  86          $cats = array( $cat->term_id => $cat );
  87          unset( $term, $cat );
  88      } else if ( 'all' == $args['content'] ) {
  89          $categories = (array) get_categories( array( 'get' => 'all' ) );
  90          $tags = (array) get_tags( array( 'get' => 'all' ) );
  91  
  92          $custom_taxonomies = get_taxonomies( array( '_builtin' => false ) );
  93          $custom_terms = (array) get_terms( $custom_taxonomies, array( 'get' => 'all' ) );
  94  
  95          // put categories in order with no child going before its parent
  96          while ( $cat = array_shift( $categories ) ) {
  97              if ( $cat->parent == 0 || isset( $cats[$cat->parent] ) )
  98                  $cats[$cat->term_id] = $cat;
  99              else
 100                  $categories[] = $cat;
 101          }
 102  
 103          // put terms in order with no child going before its parent
 104          while ( $t = array_shift( $custom_terms ) ) {
 105              if ( $t->parent == 0 || isset( $terms[$t->parent] ) )
 106                  $terms[$t->term_id] = $t;
 107              else
 108                  $custom_terms[] = $t;
 109          }
 110  
 111          unset( $categories, $custom_taxonomies, $custom_terms );
 112      }
 113  
 114      /**
 115       * Wrap given string in XML CDATA tag.
 116       *
 117       * @since 2.1.0
 118       *
 119       * @param string $str String to wrap in XML CDATA tag.
 120       */
 121  	function wxr_cdata( $str ) {
 122          if ( seems_utf8( $str ) == false )
 123              $str = utf8_encode( $str );
 124  
 125          // $str = ent2ncr(esc_html($str));
 126          $str = "<![CDATA[$str" . ( ( substr( $str, -1 ) == ']' ) ? ' ' : '' ) . ']]>';
 127  
 128          return $str;
 129      }
 130  
 131      /**
 132       * Return the URL of the site
 133       *
 134       * @since 2.5.0
 135       *
 136       * @return string Site URL.
 137       */
 138  	function wxr_site_url() {
 139          // ms: the base url
 140          if ( is_multisite() )
 141              return network_home_url();
 142          // wp: the blog url
 143          else
 144              return get_bloginfo_rss( 'url' );
 145      }
 146  
 147      /**
 148       * Output a cat_name XML tag from a given category object
 149       *
 150       * @since 2.1.0
 151       *
 152       * @param object $category Category Object
 153       */
 154  	function wxr_cat_name( $category ) {
 155          if ( empty( $category->name ) )
 156              return;
 157  
 158          echo '<wp:cat_name>' . wxr_cdata( $category->name ) . '</wp:cat_name>';
 159      }
 160  
 161      /**
 162       * Output a category_description XML tag from a given category object
 163       *
 164       * @since 2.1.0
 165       *
 166       * @param object $category Category Object
 167       */
 168  	function wxr_category_description( $category ) {
 169          if ( empty( $category->description ) )
 170              return;
 171  
 172          echo '<wp:category_description>' . wxr_cdata( $category->description ) . '</wp:category_description>';
 173      }
 174  
 175      /**
 176       * Output a tag_name XML tag from a given tag object
 177       *
 178       * @since 2.3.0
 179       *
 180       * @param object $tag Tag Object
 181       */
 182  	function wxr_tag_name( $tag ) {
 183          if ( empty( $tag->name ) )
 184              return;
 185  
 186          echo '<wp:tag_name>' . wxr_cdata( $tag->name ) . '</wp:tag_name>';
 187      }
 188  
 189      /**
 190       * Output a tag_description XML tag from a given tag object
 191       *
 192       * @since 2.3.0
 193       *
 194       * @param object $tag Tag Object
 195       */
 196  	function wxr_tag_description( $tag ) {
 197          if ( empty( $tag->description ) )
 198              return;
 199  
 200          echo '<wp:tag_description>' . wxr_cdata( $tag->description ) . '</wp:tag_description>';
 201      }
 202  
 203      /**
 204       * Output a term_name XML tag from a given term object
 205       *
 206       * @since 2.9.0
 207       *
 208       * @param object $term Term Object
 209       */
 210  	function wxr_term_name( $term ) {
 211          if ( empty( $term->name ) )
 212              return;
 213  
 214          echo '<wp:term_name>' . wxr_cdata( $term->name ) . '</wp:term_name>';
 215      }
 216  
 217      /**
 218       * Output a term_description XML tag from a given term object
 219       *
 220       * @since 2.9.0
 221       *
 222       * @param object $term Term Object
 223       */
 224  	function wxr_term_description( $term ) {
 225          if ( empty( $term->description ) )
 226              return;
 227  
 228          echo '<wp:term_description>' . wxr_cdata( $term->description ) . '</wp:term_description>';
 229      }
 230  
 231      /**
 232       * Output list of authors with posts
 233       *
 234       * @since 3.1.0
 235       */
 236  	function wxr_authors_list() {
 237          global $wpdb;
 238  
 239          $authors = array();
 240          $results = $wpdb->get_results( "SELECT DISTINCT post_author FROM $wpdb->posts" );
 241          foreach ( (array) $results as $result )
 242              $authors[] = get_userdata( $result->post_author );
 243  
 244          $authors = array_filter( $authors );
 245  
 246          foreach( $authors as $author ) {
 247              echo "\t<wp:author>";
 248              echo '<wp:author_id>' . $author->ID . '</wp:author_id>';
 249              echo '<wp:author_login>' . $author->user_login . '</wp:author_login>';
 250              echo '<wp:author_email>' . $author->user_email . '</wp:author_email>';
 251              echo '<wp:author_display_name>' . wxr_cdata( $author->display_name ) . '</wp:author_display_name>';
 252              echo '<wp:author_first_name>' . wxr_cdata( $author->user_firstname ) . '</wp:author_first_name>';
 253              echo '<wp:author_last_name>' . wxr_cdata( $author->user_lastname ) . '</wp:author_last_name>';
 254              echo "</wp:author>\n";
 255          }
 256      }
 257  
 258      /**
 259       * Ouput all navigation menu terms
 260       *
 261       * @since 3.1.0
 262       */
 263  	function wxr_nav_menu_terms() {
 264          $nav_menus = wp_get_nav_menus();
 265          if ( empty( $nav_menus ) || ! is_array( $nav_menus ) )
 266              return;
 267  
 268          foreach ( $nav_menus as $menu ) {
 269              echo "\t<wp:term><wp:term_id>{$menu->term_id}</wp:term_id><wp:term_taxonomy>nav_menu</wp:term_taxonomy><wp:term_slug>{$menu->slug}</wp:term_slug>";
 270              wxr_term_name( $menu );
 271              echo "</wp:term>\n";
 272          }
 273      }
 274  
 275      /**
 276       * Output list of taxonomy terms, in XML tag format, associated with a post
 277       *
 278       * @since 2.3.0
 279       */
 280  	function wxr_post_taxonomy() {
 281          global $post;
 282  
 283          $taxonomies = get_object_taxonomies( $post->post_type );
 284          if ( empty( $taxonomies ) )
 285              return;
 286          $terms = wp_get_object_terms( $post->ID, $taxonomies );
 287  
 288          foreach ( (array) $terms as $term ) {
 289              echo "\t\t<category domain=\"{$term->taxonomy}\" nicename=\"{$term->slug}\">" . wxr_cdata( $term->name ) . "</category>\n";
 290          }
 291      }
 292  
 293      echo '<?xml version="1.0" encoding="' . get_bloginfo('charset') . "\" ?>\n";
 294  
 295      ?>
 296  <!-- This is a WordPress eXtended RSS file generated by WordPress as an export of your site. -->
 297  <!-- It contains information about your site's posts, pages, comments, categories, and other content. -->
 298  <!-- You may use this file to transfer that content from one site to another. -->
 299  <!-- This file is not intended to serve as a complete backup of your site. -->
 300  
 301  <!-- To import this information into a WordPress site follow these steps: -->
 302  <!-- 1. Log in to that site as an administrator. -->
 303  <!-- 2. Go to Tools: Import in the WordPress admin panel. -->
 304  <!-- 3. Install the "WordPress" importer from the list. -->
 305  <!-- 4. Activate & Run Importer. -->
 306  <!-- 5. Upload this file using the form provided on that page. -->
 307  <!-- 6. You will first be asked to map the authors in this export file to users -->
 308  <!--    on the site. For each author, you may choose to map to an -->
 309  <!--    existing user on the site or to create a new user. -->
 310  <!-- 7. WordPress will then import each of the posts, pages, comments, categories, etc. -->
 311  <!--    contained in this file into your site. -->
 312  
 313  <?php the_generator( 'export' ); ?>
 314  <rss version="2.0"
 315      xmlns:excerpt="http://wordpress.org/export/<?php echo WXR_VERSION; ?>/excerpt/"
 316      xmlns:content="http://purl.org/rss/1.0/modules/content/"
 317      xmlns:wfw="http://wellformedweb.org/CommentAPI/"
 318      xmlns:dc="http://purl.org/dc/elements/1.1/"
 319      xmlns:wp="http://wordpress.org/export/<?php echo WXR_VERSION; ?>/"
 320  >
 321  
 322  <channel>
 323      <title><?php bloginfo_rss( 'name' ); ?></title>
 324      <link><?php bloginfo_rss( 'url' ); ?></link>
 325      <description><?php bloginfo_rss( 'description' ); ?></description>
 326      <pubDate><?php echo date( 'D, d M Y H:i:s +0000' ); ?></pubDate>
 327      <language><?php echo get_option( 'rss_language' ); ?></language>
 328      <wp:wxr_version><?php echo WXR_VERSION; ?></wp:wxr_version>
 329      <wp:base_site_url><?php echo wxr_site_url(); ?></wp:base_site_url>
 330      <wp:base_blog_url><?php bloginfo_rss( 'url' ); ?></wp:base_blog_url>
 331  
 332  <?php wxr_authors_list(); ?>
 333  
 334  <?php foreach ( $cats as $c ) : ?>
 335      <wp:category><wp:term_id><?php echo $c->term_id ?></wp:term_id><wp:category_nicename><?php echo $c->slug; ?></wp:category_nicename><wp:category_parent><?php echo $c->parent ? $cats[$c->parent]->slug : ''; ?></wp:category_parent><?php wxr_cat_name( $c ); ?><?php wxr_category_description( $c ); ?></wp:category>
 336  <?php endforeach; ?>
 337  <?php foreach ( $tags as $t ) : ?>
 338      <wp:tag><wp:term_id><?php echo $t->term_id ?></wp:term_id><wp:tag_slug><?php echo $t->slug; ?></wp:tag_slug><?php wxr_tag_name( $t ); ?><?php wxr_tag_description( $t ); ?></wp:tag>
 339  <?php endforeach; ?>
 340  <?php foreach ( $terms as $t ) : ?>
 341      <wp:term><wp:term_id><?php echo $t->term_id ?></wp:term_id><wp:term_taxonomy><?php echo $t->taxonomy; ?></wp:term_taxonomy><wp:term_slug><?php echo $t->slug; ?></wp:term_slug><wp:term_parent><?php echo $t->parent ? $terms[$t->parent]->slug : ''; ?></wp:term_parent><?php wxr_term_name( $t ); ?><?php wxr_term_description( $t ); ?></wp:term>
 342  <?php endforeach; ?>
 343  <?php if ( 'all' == $args['content'] ) wxr_nav_menu_terms(); ?>
 344  
 345      <?php do_action( 'rss2_head' ); ?>
 346  
 347  <?php if ( $post_ids ) {
 348      global $wp_query;
 349      $wp_query->in_the_loop = true; // Fake being in the loop.
 350  
 351      // fetch 20 posts at a time rather than loading the entire table into memory
 352      while ( $next_posts = array_splice( $post_ids, 0, 20 ) ) {
 353      $where = 'WHERE ID IN (' . join( ',', $next_posts ) . ')';
 354      $posts = $wpdb->get_results( "SELECT * FROM {$wpdb->posts} $where" );
 355  
 356      // Begin Loop
 357      foreach ( $posts as $post ) {
 358          setup_postdata( $post );
 359          $is_sticky = is_sticky( $post->ID ) ? 1 : 0;
 360  ?>
 361      <item>
 362          <title><?php echo apply_filters( 'the_title_rss', $post->post_title ); ?></title>
 363          <link><?php the_permalink_rss() ?></link>
 364          <pubDate><?php echo mysql2date( 'D, d M Y H:i:s +0000', get_post_time( 'Y-m-d H:i:s', true ), false ); ?></pubDate>
 365          <dc:creator><?php echo get_the_author_meta( 'login' ); ?></dc:creator>
 366          <guid isPermaLink="false"><?php esc_url( the_guid() ); ?></guid>
 367          <description></description>
 368          <content:encoded><?php echo wxr_cdata( apply_filters( 'the_content_export', $post->post_content ) ); ?></content:encoded>
 369          <excerpt:encoded><?php echo wxr_cdata( apply_filters( 'the_excerpt_export', $post->post_excerpt ) ); ?></excerpt:encoded>
 370          <wp:post_id><?php echo $post->ID; ?></wp:post_id>
 371          <wp:post_date><?php echo $post->post_date; ?></wp:post_date>
 372          <wp:post_date_gmt><?php echo $post->post_date_gmt; ?></wp:post_date_gmt>
 373          <wp:comment_status><?php echo $post->comment_status; ?></wp:comment_status>
 374          <wp:ping_status><?php echo $post->ping_status; ?></wp:ping_status>
 375          <wp:post_name><?php echo $post->post_name; ?></wp:post_name>
 376          <wp:status><?php echo $post->post_status; ?></wp:status>
 377          <wp:post_parent><?php echo $post->post_parent; ?></wp:post_parent>
 378          <wp:menu_order><?php echo $post->menu_order; ?></wp:menu_order>
 379          <wp:post_type><?php echo $post->post_type; ?></wp:post_type>
 380          <wp:post_password><?php echo $post->post_password; ?></wp:post_password>
 381          <wp:is_sticky><?php echo $is_sticky; ?></wp:is_sticky>
 382  <?php    if ( $post->post_type == 'attachment' ) : ?>
 383          <wp:attachment_url><?php echo wp_get_attachment_url( $post->ID ); ?></wp:attachment_url>
 384  <?php     endif; ?>
 385  <?php     wxr_post_taxonomy(); ?>
 386  <?php    $postmeta = $wpdb->get_results( $wpdb->prepare( "SELECT * FROM $wpdb->postmeta WHERE post_id = %d", $post->ID ) );
 387          foreach( $postmeta as $meta ) : if ( $meta->meta_key != '_edit_lock' ) : ?>
 388          <wp:postmeta>
 389              <wp:meta_key><?php echo $meta->meta_key; ?></wp:meta_key>
 390              <wp:meta_value><?php echo wxr_cdata( $meta->meta_value ); ?></wp:meta_value>
 391          </wp:postmeta>
 392  <?php    endif; endforeach; ?>
 393  <?php    $comments = $wpdb->get_results( $wpdb->prepare( "SELECT * FROM $wpdb->comments WHERE comment_post_ID = %d AND comment_approved <> 'spam'", $post->ID ) );
 394          foreach ( $comments as $c ) : ?>
 395          <wp:comment>
 396              <wp:comment_id><?php echo $c->comment_ID; ?></wp:comment_id>
 397              <wp:comment_author><?php echo wxr_cdata( $c->comment_author ); ?></wp:comment_author>
 398              <wp:comment_author_email><?php echo $c->comment_author_email; ?></wp:comment_author_email>
 399              <wp:comment_author_url><?php echo esc_url_raw( $c->comment_author_url ); ?></wp:comment_author_url>
 400              <wp:comment_author_IP><?php echo $c->comment_author_IP; ?></wp:comment_author_IP>
 401              <wp:comment_date><?php echo $c->comment_date; ?></wp:comment_date>
 402              <wp:comment_date_gmt><?php echo $c->comment_date_gmt; ?></wp:comment_date_gmt>
 403              <wp:comment_content><?php echo wxr_cdata( $c->comment_content ) ?></wp:comment_content>
 404              <wp:comment_approved><?php echo $c->comment_approved; ?></wp:comment_approved>
 405              <wp:comment_type><?php echo $c->comment_type; ?></wp:comment_type>
 406              <wp:comment_parent><?php echo $c->comment_parent; ?></wp:comment_parent>
 407              <wp:comment_user_id><?php echo $c->user_id; ?></wp:comment_user_id>
 408  <?php        $c_meta = $wpdb->get_results( $wpdb->prepare( "SELECT * FROM $wpdb->commentmeta WHERE comment_id = %d", $c->comment_ID ) );
 409              foreach ( $c_meta as $meta ) : ?>
 410              <wp:commentmeta>
 411                  <wp:meta_key><?php echo $meta->meta_key; ?></wp:meta_key>
 412                  <wp:meta_value><?php echo wxr_cdata( $meta->meta_value ); ?></wp:meta_value>
 413              </wp:commentmeta>
 414  <?php        endforeach; ?>
 415          </wp:comment>
 416  <?php    endforeach; ?>
 417      </item>
 418  <?php
 419      }
 420      }
 421  } ?>
 422  </channel>
 423  </rss>
 424  <?php
 425  }