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   1  <?php
   2  /**
   3   * WordPress core upgrade functionality.
   4   *
   5   * @package WordPress
   6   * @subpackage Administration
   7   * @since 2.7.0
   8   */
   9  
  10  /**
  11   * Stores files to be deleted.
  12   *
  13   * @since 2.7.0
  14   * @global array $_old_files
  15   * @var array
  16   * @name $_old_files
  17   */
  18  global $_old_files;
  19  
  20  $_old_files = array(
  21  'wp-admin/bookmarklet.php',
  22  'wp-admin/css/upload.css',
  23  'wp-admin/css/upload-rtl.css',
  24  'wp-admin/css/press-this-ie.css',
  25  'wp-admin/css/press-this-ie-rtl.css',
  26  'wp-admin/edit-form.php',
  27  'wp-admin/link-import.php',
  28  'wp-admin/images/box-bg-left.gif',
  29  'wp-admin/images/box-bg-right.gif',
  30  'wp-admin/images/box-bg.gif',
  31  'wp-admin/images/box-butt-left.gif',
  32  'wp-admin/images/box-butt-right.gif',
  33  'wp-admin/images/box-butt.gif',
  34  'wp-admin/images/box-head-left.gif',
  35  'wp-admin/images/box-head-right.gif',
  36  'wp-admin/images/box-head.gif',
  37  'wp-admin/images/heading-bg.gif',
  38  'wp-admin/images/login-bkg-bottom.gif',
  39  'wp-admin/images/login-bkg-tile.gif',
  40  'wp-admin/images/notice.gif',
  41  'wp-admin/images/toggle.gif',
  42  'wp-admin/images/comment-stalk-classic.gif',
  43  'wp-admin/images/comment-stalk-fresh.gif',
  44  'wp-admin/images/comment-stalk-rtl.gif',
  45  'wp-admin/images/comment-pill.gif',
  46  'wp-admin/images/del.png',
  47  'wp-admin/images/media-button-gallery.gif',
  48  'wp-admin/images/media-buttons.gif',
  49  'wp-admin/images/tail.gif',
  50  'wp-admin/images/gear.png',
  51  'wp-admin/images/tab.png',
  52  'wp-admin/images/postbox-bg.gif',
  53  'wp-admin/includes/upload.php',
  54  'wp-admin/js/dbx-admin-key.js',
  55  'wp-admin/js/link-cat.js',
  56  'wp-admin/js/forms.js',
  57  'wp-admin/js/upload.js',
  58  'wp-admin/js/set-post-thumbnail-handler.js',
  59  'wp-admin/js/set-post-thumbnail-handler.dev.js',
  60  'wp-admin/js/page.js',
  61  'wp-admin/js/page.dev.js',
  62  'wp-admin/js/slug.js',
  63  'wp-admin/js/slug.dev.js',
  64  'wp-admin/profile-update.php',
  65  'wp-admin/templates.php',
  66  'wp-includes/images/audio.png',
  67  'wp-includes/images/css.png',
  68  'wp-includes/images/default.png',
  69  'wp-includes/images/doc.png',
  70  'wp-includes/images/exe.png',
  71  'wp-includes/images/html.png',
  72  'wp-includes/images/js.png',
  73  'wp-includes/images/pdf.png',
  74  'wp-includes/images/swf.png',
  75  'wp-includes/images/tar.png',
  76  'wp-includes/images/text.png',
  77  'wp-includes/images/video.png',
  78  'wp-includes/images/zip.png',
  79  'wp-includes/js/dbx.js',
  80  'wp-includes/js/fat.js',
  81  'wp-includes/js/list-manipulation.js',
  82  'wp-includes/js/jquery/jquery.dimensions.min.js',
  83  'wp-includes/js/tinymce/langs/en.js',
  84  'wp-includes/js/tinymce/plugins/autosave/editor_plugin_src.js',
  85  'wp-includes/js/tinymce/plugins/autosave/langs',
  86  'wp-includes/js/tinymce/plugins/directionality/images',
  87  'wp-includes/js/tinymce/plugins/directionality/langs',
  88  'wp-includes/js/tinymce/plugins/inlinepopups/css',
  89  'wp-includes/js/tinymce/plugins/inlinepopups/images',
  90  'wp-includes/js/tinymce/plugins/inlinepopups/jscripts',
  91  'wp-includes/js/tinymce/plugins/paste/images',
  92  'wp-includes/js/tinymce/plugins/paste/jscripts',
  93  'wp-includes/js/tinymce/plugins/paste/langs',
  94  'wp-includes/js/tinymce/plugins/spellchecker/classes/HttpClient.class.php',
  95  'wp-includes/js/tinymce/plugins/spellchecker/classes/TinyGoogleSpell.class.php',
  96  'wp-includes/js/tinymce/plugins/spellchecker/classes/TinyPspell.class.php',
  97  'wp-includes/js/tinymce/plugins/spellchecker/classes/TinyPspellShell.class.php',
  98  'wp-includes/js/tinymce/plugins/spellchecker/css/spellchecker.css',
  99  'wp-includes/js/tinymce/plugins/spellchecker/images',
 100  'wp-includes/js/tinymce/plugins/spellchecker/langs',
 101  'wp-includes/js/tinymce/plugins/spellchecker/tinyspell.php',
 102  'wp-includes/js/tinymce/plugins/wordpress/images',
 103  'wp-includes/js/tinymce/plugins/wordpress/langs',
 104  'wp-includes/js/tinymce/plugins/wordpress/popups.css',
 105  'wp-includes/js/tinymce/plugins/wordpress/wordpress.css',
 106  'wp-includes/js/tinymce/plugins/wphelp',
 107  'wp-includes/js/tinymce/themes/advanced/css',
 108  'wp-includes/js/tinymce/themes/advanced/images',
 109  'wp-includes/js/tinymce/themes/advanced/jscripts',
 110  'wp-includes/js/tinymce/themes/advanced/langs',
 111  'wp-includes/js/tinymce/tiny_mce_gzip.php',
 112  'wp-includes/js/wp-ajax.js',
 113  'wp-admin/admin-db.php',
 114  'wp-admin/cat.js',
 115  'wp-admin/categories.js',
 116  'wp-admin/custom-fields.js',
 117  'wp-admin/dbx-admin-key.js',
 118  'wp-admin/edit-comments.js',
 119  'wp-admin/install-rtl.css',
 120  'wp-admin/install.css',
 121  'wp-admin/upgrade-schema.php',
 122  'wp-admin/upload-functions.php',
 123  'wp-admin/upload-rtl.css',
 124  'wp-admin/upload.css',
 125  'wp-admin/upload.js',
 126  'wp-admin/users.js',
 127  'wp-admin/widgets-rtl.css',
 128  'wp-admin/widgets.css',
 129  'wp-admin/xfn.js',
 130  'wp-includes/js/tinymce/license.html',
 131  'wp-admin/cat-js.php',
 132  'wp-admin/edit-form-ajax-cat.php',
 133  'wp-admin/execute-pings.php',
 134  'wp-admin/import/b2.php',
 135  'wp-admin/import/btt.php',
 136  'wp-admin/import/jkw.php',
 137  'wp-admin/inline-uploading.php',
 138  'wp-admin/link-categories.php',
 139  'wp-admin/list-manipulation.js',
 140  'wp-admin/list-manipulation.php',
 141  'wp-includes/comment-functions.php',
 142  'wp-includes/feed-functions.php',
 143  'wp-includes/functions-compat.php',
 144  'wp-includes/functions-formatting.php',
 145  'wp-includes/functions-post.php',
 146  'wp-includes/js/dbx-key.js',
 147  'wp-includes/js/tinymce/plugins/autosave/langs/cs.js',
 148  'wp-includes/js/tinymce/plugins/autosave/langs/sv.js',
 149  'wp-includes/js/tinymce/themes/advanced/editor_template_src.js',
 150  'wp-includes/links.php',
 151  'wp-includes/pluggable-functions.php',
 152  'wp-includes/template-functions-author.php',
 153  'wp-includes/template-functions-category.php',
 154  'wp-includes/template-functions-general.php',
 155  'wp-includes/template-functions-links.php',
 156  'wp-includes/template-functions-post.php',
 157  'wp-includes/wp-l10n.php',
 158  'wp-admin/import-b2.php',
 159  'wp-admin/import-blogger.php',
 160  'wp-admin/import-greymatter.php',
 161  'wp-admin/import-livejournal.php',
 162  'wp-admin/import-mt.php',
 163  'wp-admin/import-rss.php',
 164  'wp-admin/import-textpattern.php',
 165  'wp-admin/quicktags.js',
 166  'wp-images/fade-butt.png',
 167  'wp-images/get-firefox.png',
 168  'wp-images/header-shadow.png',
 169  'wp-images/smilies',
 170  'wp-images/wp-small.png',
 171  'wp-images/wpminilogo.png',
 172  'wp.php',
 173  'wp-includes/gettext.php',
 174  'wp-includes/streams.php'
 175  );
 176  
 177  /**
 178   * Upgrade the core of WordPress.
 179   *
 180   * This will create a .maintenance file at the base of the WordPress directory
 181   * to ensure that people can not access the web site, when the files are being
 182   * copied to their locations.
 183   *
 184   * The files in the {@link $_old_files} list will be removed and the new files
 185   * copied from the zip file after the database is upgraded.
 186   *
 187   * The steps for the upgrader for after the new release is downloaded and
 188   * unzipped is:
 189   *   1. Test unzipped location for select files to ensure that unzipped worked.
 190   *   2. Create the .maintenance file in current WordPress base.
 191   *   3. Copy new WordPress directory over old WordPress files.
 192   *   4. Upgrade WordPress to new version.
 193   *   5. Delete new WordPress directory path.
 194   *   6. Delete .maintenance file.
 195   *   7. Remove old files.
 196   *   8. Delete 'update_core' option.
 197   *
 198   * There are several areas of failure. For instance if PHP times out before step
 199   * 6, then you will not be able to access any portion of your site. Also, since
 200   * the upgrade will not continue where it left off, you will not be able to
 201   * automatically remove old files and remove the 'update_core' option. This
 202   * isn't that bad.
 203   *
 204   * If the copy of the new WordPress over the old fails, then the worse is that
 205   * the new WordPress directory will remain.
 206   *
 207   * If it is assumed that every file will be copied over, including plugins and
 208   * themes, then if you edit the default theme, you should rename it, so that
 209   * your changes remain.
 210   *
 211   * @since 2.7.0
 212   *
 213   * @param string $from New release unzipped path.
 214   * @param string $to Path to old WordPress installation.
 215   * @return WP_Error|null WP_Error on failure, null on success.
 216   */
 217  function update_core($from, $to) {
 218      global $wp_filesystem, $_old_files, $wpdb;
 219  
 220      @set_time_limit( 300 );
 221  
 222      $php_version    = phpversion();
 223      $mysql_version  = $wpdb->db_version();
 224      $required_php_version = '4.3';
 225      $required_mysql_version = '4.1.2';
 226      $wp_version = '2.9.1';
 227      $php_compat     = version_compare( $php_version, $required_php_version, '>=' );
 228      $mysql_compat   = version_compare( $mysql_version, $required_mysql_version, '>=' ) || file_exists( WP_CONTENT_DIR . '/db.php' );
 229  
 230      if ( !$mysql_compat || !$php_compat )
 231          $wp_filesystem->delete($from, true);
 232  
 233      if ( !$mysql_compat && !$php_compat )
 234          return new WP_Error( 'php_mysql_not_compatible', sprintf( __('The update cannot be installed because WordPress %1$s requires PHP version %2$s or higher and MySQL version %3$s or higher. You are running PHP version %4$s and MySQL version %5$s.'), $wp_version, $required_php_version, $required_mysql_version, $php_version, $mysql_version ) );
 235      elseif ( !$php_compat )
 236          return new WP_Error( 'php_not_compatible', sprintf( __('The update cannot be installed because WordPress %1$s requires PHP version %2$s or higher. You are running version %3$s.'), $wp_version, $required_php_version, $php_version ) );
 237      elseif ( !$mysql_compat )
 238          return new WP_Error( 'mysql_not_compatible', sprintf( __('The update cannot be installed because WordPress %1$s requires MySQL version %2$s or higher. You are running version %3$s.'), $wp_version, $required_mysql_version, $mysql_version ) );
 239  
 240      // Sanity check the unzipped distribution
 241      apply_filters('update_feedback', __('Verifying the unpacked files'));
 242      if ( !$wp_filesystem->exists($from . '/wordpress/wp-settings.php') || !$wp_filesystem->exists($from . '/wordpress/wp-admin/admin.php') ||
 243          !$wp_filesystem->exists($from . '/wordpress/wp-includes/functions.php') ) {
 244          $wp_filesystem->delete($from, true);
 245          return new WP_Error('insane_distro', __('The update could not be unpacked') );
 246      }
 247  
 248      apply_filters('update_feedback', __('Installing the latest version'));
 249  
 250      // Create maintenance file to signal that we are upgrading
 251      $maintenance_string = '<?php $upgrading = ' . time() . '; ?>';
 252      $maintenance_file = $to . '.maintenance';
 253      $wp_filesystem->delete($maintenance_file);
 254      $wp_filesystem->put_contents($maintenance_file, $maintenance_string, FS_CHMOD_FILE);
 255  
 256      // Copy new versions of WP files into place.
 257      $result = copy_dir($from . '/wordpress', $to);
 258      if ( is_wp_error($result) ) {
 259          $wp_filesystem->delete($maintenance_file);
 260          $wp_filesystem->delete($from, true);
 261          return $result;
 262      }
 263  
 264      // Remove old files
 265      foreach ( $_old_files as $old_file ) {
 266          $old_file = $to . $old_file;
 267          if ( !$wp_filesystem->exists($old_file) )
 268              continue;
 269          $wp_filesystem->delete($old_file, true);
 270      }
 271  
 272      // Upgrade DB with separate request
 273      apply_filters('update_feedback', __('Upgrading database'));
 274      $db_upgrade_url = admin_url('upgrade.php?step=upgrade_db');
 275      wp_remote_post($db_upgrade_url, array('timeout' => 60));
 276  
 277      // Remove working directory
 278      $wp_filesystem->delete($from, true);
 279  
 280      // Force refresh of update information
 281      if ( function_exists('delete_transient') )
 282          delete_transient('update_core');
 283      else
 284          delete_option('update_core');
 285  
 286      // Remove maintenance file, we're done.
 287      $wp_filesystem->delete($maintenance_file);
 288  }
 289  
 290  ?>