wp-admin/includes/update-core.php

   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 // MU
 176 'wp-admin/wpmu-admin.php',
 177 'wp-admin/wpmu-blogs.php',
 178 'wp-admin/wpmu-edit.php',
 179 'wp-admin/wpmu-options.php',
 180 'wp-admin/wpmu-themes.php',
 181 'wp-admin/wpmu-upgrade-site.php',
 182 'wp-admin/wpmu-users.php',
 183 'wp-includes/wpmu-default-filters.php',
 184 'wp-includes/wpmu-functions.php',
 185 'wpmu-settings.php',
 186 'index-install.php',
 187 'README.txt',
 188 'htaccess.dist',
 189 'wp-admin/css/mu-rtl.css',
 190 'wp-admin/css/mu.css',
 191 'wp-admin/images/site-admin.png',
 192 'wp-admin/includes/mu.php',
 193 'wp-includes/images/wordpress-mu.png',
 194 // 3.0
 195 'wp-admin/categories.php',
 196 'wp-admin/edit-category-form.php',
 197 'wp-admin/edit-page-form.php',
 198 'wp-admin/edit-pages.php',
 199 'wp-admin/images/wp-logo.gif',
 200 'wp-admin/js/wp-gears.dev.js',
 201 'wp-admin/js/wp-gears.js',
 202 'wp-admin/options-misc.php',
 203 'wp-admin/page-new.php',
 204 'wp-admin/page.php',
 205 'wp-admin/rtl.css',
 206 'wp-admin/rtl.dev.css',
 207 'wp-admin/update-links.php',
 208 'wp-admin/wp-admin.css',
 209 'wp-admin/wp-admin.dev.css',
 210 'wp-includes/js/codepress',
 211 'wp-includes/js/jquery/autocomplete.dev.js',
 212 'wp-includes/js/jquery/interface.js',
 213 'wp-includes/js/jquery/autocomplete.js',
 214 'wp-includes/js/scriptaculous/prototype.js',
 215 'wp-includes/js/tinymce/wp-tinymce.js',
 216 'wp-admin/import',
 217 'wp-admin/images/ico-edit.png',
 218 'wp-admin/images/fav-top.png',
 219 'wp-admin/images/ico-close.png',
 220 'wp-admin/images/admin-header-footer.png',
 221 'wp-admin/images/screen-options-left.gif',
 222 'wp-admin/images/ico-add.png',
 223 'wp-admin/images/browse-happy.gif',
 224 'wp-admin/images/ico-viewpage.png',
 225 // 3.1
 226 'wp-includes/js/tinymce/blank.htm',
 227 'wp-includes/js/tinymce/plugins/safari',
 228 'wp-admin/edit-link-categories.php',
 229 'wp-admin/edit-post-rows.php',
 230 'wp-admin/edit-attachment-rows.php',
 231 'wp-admin/link-category.php',
 232 'wp-admin/edit-link-category-form.php',
 233 'wp-admin/sidebar.php',
 234 'wp-admin/images/list-vs.png',
 235 'wp-admin/images/button-grad-vs.png',
 236 'wp-admin/images/button-grad-active-vs.png',
 237 'wp-admin/images/fav-arrow-vs.gif',
 238 'wp-admin/images/fav-arrow-vs-rtl.gif',
 239 'wp-admin/images/fav-top-vs.gif',
 240 'wp-admin/images/screen-options-right.gif',
 241 'wp-admin/images/screen-options-right-up.gif',
 242 'wp-admin/images/visit-site-button-grad-vs.gif',
 243 'wp-admin/images/visit-site-button-grad.gif',
 244 'wp-includes/classes.php',
 245 // 3.2
 246 'wp-includes/default-embeds.php',
 247 'wp-includes/js/tinymce/plugins/wordpress/img/more.gif',
 248 'wp-includes/js/tinymce/plugins/wordpress/img/toolbars.gif',
 249 'wp-includes/js/tinymce/plugins/wordpress/img/help.gif',
 250 'wp-includes/js/tinymce/themes/advanced/img/fm.gif',
 251 'wp-includes/js/tinymce/themes/advanced/img/sflogo.png',
 252 'wp-admin/js/list-table.js',
 253 'wp-admin/js/list-table.dev.js',
 254 'wp-admin/images/logo-login.gif',
 255 'wp-admin/images/star.gif'
 256 );
 257
 258 /**
 259  * Stores new files in wp-content to copy
 260  *
 261  * The contents of this array indicate any new bundled plugins/themes which
 262  * should be installed with the WordPress Upgrade. These items will not be
 263  * re-installed in future upgrades, this behaviour is controlled by the
 264  * introduced version present here being older than the current installed version.
 265  *
 266  * The content of this array should follow the following format:
 267  *  Filename (relative to wp-content) => Introduced version
 268  * Directories should be noted by suffixing it with a trailing slash (/)
 269  *
 270  * @since 3.2.0
 271  * @global array $_new_bundled_files
 272  * @var array
 273  * @name $_new_bundled_files
 274  */
 275 global $_new_bundled_files;
 276
 277 $_new_bundled_files = array(
 278 'plugins/akismet/' => '2.0',
 279 'themes/twentyten/' => '3.0',
 280 'themes/twentyeleven/' => '3.2'
 281 );
 282
 283 /**
 284  * Upgrade the core of WordPress.
 285  *
 286  * This will create a .maintenance file at the base of the WordPress directory
 287  * to ensure that people can not access the web site, when the files are being
 288  * copied to their locations.
 289  *
 290  * The files in the {@link $_old_files} list will be removed and the new files
 291  * copied from the zip file after the database is upgraded.
 292  *
 293  * The files in the {@link $_new_bundled_files} list will be added to the installation
 294  * if the version is greater than or equal to the old version being upgraded.
 295  *
 296  * The steps for the upgrader for after the new release is downloaded and
 297  * unzipped is:
 298  *   1. Test unzipped location for select files to ensure that unzipped worked.
 299  *   2. Create the .maintenance file in current WordPress base.
 300  *   3. Copy new WordPress directory over old WordPress files.
 301  *   4. Upgrade WordPress to new version.
 302  *     4.1. Copy all files/folders other than wp-content
 303  *     4.2. Copy any language files to WP_LANG_DIR (which may differ from WP_CONTENT_DIR
 304  *     4.3. Copy any new bundled themes/plugins to their respective locations
 305  *   5. Delete new WordPress directory path.
 306  *   6. Delete .maintenance file.
 307  *   7. Remove old files.
 308  *   8. Delete 'update_core' option.
 309  *
 310  * There are several areas of failure. For instance if PHP times out before step
 311  * 6, then you will not be able to access any portion of your site. Also, since
 312  * the upgrade will not continue where it left off, you will not be able to
 313  * automatically remove old files and remove the 'update_core' option. This
 314  * isn't that bad.
 315  *
 316  * If the copy of the new WordPress over the old fails, then the worse is that
 317  * the new WordPress directory will remain.
 318  *
 319  * If it is assumed that every file will be copied over, including plugins and
 320  * themes, then if you edit the default theme, you should rename it, so that
 321  * your changes remain.
 322  *
 323  * @since 2.7.0
 324  *
 325  * @param string $from New release unzipped path.
 326  * @param string $to Path to old WordPress installation.
 327  * @return WP_Error|null WP_Error on failure, null on success.
 328  */
 329 function update_core($from, $to) {
 330         global $wp_filesystem, $_old_files, $_new_bundled_files, $wpdb;
 331
 332         @set_time_limit( 300 );
 333
 334         $php_version    = phpversion();
 335         $mysql_version  = $wpdb->db_version();
 336         $required_php_version = '5.2.4';
 337         $required_mysql_version = '5.0';
 338         $wp_version = '3.2.1';
 339         $php_compat     = version_compare( $php_version, $required_php_version, '>=' );
 340         $mysql_compat   = version_compare( $mysql_version, $required_mysql_version, '>=' ) || file_exists( WP_CONTENT_DIR . '/db.php' );
 341
 342         if ( !$mysql_compat || !$php_compat )
 343                 $wp_filesystem->delete($from, true);
 344
 345         if ( !$mysql_compat && !$php_compat )
 346                 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, $mysql_version ) );
 347         elseif ( !$php_compat )
 348                 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, $php_version ) );
 349         elseif ( !$mysql_compat )
 350                 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 ) );
 351
 352         // Sanity check the unzipped distribution
 353         apply_filters('update_feedback', __('Verifying the unpacked files&#8230;'));
 354         $distro = '';
 355         $roots = array( '/wordpress/', '/wordpress-mu/' );
 356         foreach( $roots as $root ) {
 357                 if ( $wp_filesystem->exists($from . $root . 'readme.html') && $wp_filesystem->exists($from . $root . 'wp-includes/version.php') ) {
 358                         $distro = $root;
 359                         break;
 360                 }
 361         }
 362         if ( !$distro ) {
 363                 $wp_filesystem->delete($from, true);
 364                 return new WP_Error('insane_distro', __('The update could not be unpacked') );
 365         }
 366
 367         apply_filters('update_feedback', __('Installing the latest version&#8230;'));
 368
 369         // Create maintenance file to signal that we are upgrading
 370         $maintenance_string = '<?php $upgrading = ' . time() . '; ?>';
 371         $maintenance_file = $to . '.maintenance';
 372         $wp_filesystem->delete($maintenance_file);
 373         $wp_filesystem->put_contents($maintenance_file, $maintenance_string, FS_CHMOD_FILE);
 374
 375         // Copy new versions of WP files into place.
 376         $result = _copy_dir($from . $distro, $to, array('wp-content') );
 377
 378         // Custom Content Directory needs updating now.
 379         // Copy Languages
 380         if ( !is_wp_error($result) && $wp_filesystem->is_dir($from . $distro . 'wp-content/languages') ) {
 381                 if ( WP_LANG_DIR != ABSPATH . WPINC . '/languages' || @is_dir(WP_LANG_DIR) )
 382                         $lang_dir = WP_LANG_DIR;
 383                 else
 384                         $lang_dir = WP_CONTENT_DIR . '/languages';
 385
 386                 if ( !@is_dir($lang_dir) && 0 === strpos($lang_dir, ABSPATH) ) { // Check the language directory exists first
 387                         $wp_filesystem->mkdir($to . str_replace($lang_dir, ABSPATH, ''), FS_CHMOD_DIR); // If it's within the ABSPATH we can handle it here, otherwise they're out of luck.
 388                         clearstatcache(); // for FTP, Need to clear the stat cache
 389                 }
 390
 391                 if ( @is_dir($lang_dir) ) {
 392                         $wp_lang_dir = $wp_filesystem->find_folder($lang_dir);
 393                         if ( $wp_lang_dir )
 394                                 $result = copy_dir($from . $distro . 'wp-content/languages/', $wp_lang_dir);
 395                 }
 396         }
 397
 398         // Copy New bundled plugins & themes
 399         // This gives us the ability to install new plugins & themes bundled with future versions of WordPress whilst avoiding the re-install upon upgrade issue.
 400         if ( !is_wp_error($result) && ( ! defined('CORE_UPGRADE_SKIP_NEW_BUNDLED') || ! CORE_UPGRADE_SKIP_NEW_BUNDLED ) ) {
 401                 $old_version = $GLOBALS['wp_version']; // $wp_version in local scope == new version
 402                 foreach ( (array) $_new_bundled_files as $file => $introduced_version ) {
 403                         // If $introduced version is greater than what the site was previously running
 404                         if ( version_compare($introduced_version, $old_version, '>') ) {
 405                                 $directory = ('/' == $file[ strlen($file)-1 ]);
 406                                 list($type, $filename) = explode('/', $file, 2);
 407
 408                                 if ( 'plugins' == $type )
 409                                         $dest = $wp_filesystem->wp_plugins_dir();
 410                                 elseif ( 'themes' == $type )
 411                                         $dest = trailingslashit($wp_filesystem->wp_themes_dir()); // Back-compat, ::wp_themes_dir() did not return trailingslash'd pre-3.2
 412                                 else
 413                                         continue;
 414
 415                                 if ( ! $directory ) {
 416                                         if ( $wp_filesystem->exists($dest . $filename) )
 417                                                 continue;
 418
 419                                         if ( ! $wp_filesystem->copy($from . $distro . 'wp-content/' . $file, $dest . $filename, FS_CHMOD_FILE) )
 420                                                 $result = new WP_Error('copy_failed', __('Could not copy file.'), $dest . $filename);
 421                                 } else {
 422                                         if ( $wp_filesystem->is_dir($dest . $filename) )
 423                                                 continue;
 424
 425                                         $wp_filesystem->mkdir($dest . $filename, FS_CHMOD_DIR);
 426                                         $_result = copy_dir( $from . $distro . 'wp-content/' . $file, $dest . $filename);
 427                                         if ( is_wp_error($_result) ) //If a error occurs partway through this final step, keep the error flowing through, but keep process going.
 428                                                 $result = $_result;
 429                                 }
 430                         }
 431                 } //end foreach
 432         }
 433
 434         // Handle $result error from the above blocks
 435         if ( is_wp_error($result) ) {
 436                 $wp_filesystem->delete($maintenance_file);
 437                 $wp_filesystem->delete($from, true);
 438                 return $result;
 439         }
 440
 441         // Remove old files
 442         foreach ( $_old_files as $old_file ) {
 443                 $old_file = $to . $old_file;
 444                 if ( !$wp_filesystem->exists($old_file) )
 445                         continue;
 446                 $wp_filesystem->delete($old_file, true);
 447         }
 448
 449         // Upgrade DB with separate request
 450         apply_filters('update_feedback', __('Upgrading database&#8230;'));
 451         $db_upgrade_url = admin_url('upgrade.php?step=upgrade_db');
 452         wp_remote_post($db_upgrade_url, array('timeout' => 60));
 453
 454         // Remove working directory
 455         $wp_filesystem->delete($from, true);
 456
 457         // Force refresh of update information
 458         if ( function_exists('delete_site_transient') )
 459                 delete_site_transient('update_core');
 460         else
 461                 delete_option('update_core');
 462
 463         // Remove maintenance file, we're done.
 464         $wp_filesystem->delete($maintenance_file);
 465 }
 466
 467 /**
 468  * Copies a directory from one location to another via the WordPress Filesystem Abstraction.
 469  * Assumes that WP_Filesystem() has already been called and setup.
 470  *
 471  * This is a temporary function for the 3.1 -> 3.2 upgrade only and will be removed in 3.3
 472  *
 473  * @ignore
 474  * @since 3.2.0
 475  * @see copy_dir()
 476  *
 477  * @param string $from source directory
 478  * @param string $to destination directory
 479  * @param array $skip_list a list of files/folders to skip copying
 480  * @return mixed WP_Error on failure, True on success.
 481  */
 482 function _copy_dir($from, $to, $skip_list = array() ) {
 483         global $wp_filesystem;
 484
 485         $dirlist = $wp_filesystem->dirlist($from);
 486
 487         $from = trailingslashit($from);
 488         $to = trailingslashit($to);
 489
 490         $skip_regex = '';
 491         foreach ( (array)$skip_list as $key => $skip_file )
 492                 $skip_regex .= preg_quote($skip_file, '!') . '|';
 493
 494         if ( !empty($skip_regex) )
 495                 $skip_regex = '!(' . rtrim($skip_regex, '|') . ')$!i';
 496
 497         foreach ( (array) $dirlist as $filename => $fileinfo ) {
 498                 if ( !empty($skip_regex) )
 499                         if ( preg_match($skip_regex, $from . $filename) )
 500                                 continue;
 501
 502                 if ( 'f' == $fileinfo['type'] ) {
 503                         if ( ! $wp_filesystem->copy($from . $filename, $to . $filename, true, FS_CHMOD_FILE) ) {
 504                                 // If copy failed, chmod file to 0644 and try again.
 505                                 $wp_filesystem->chmod($to . $filename, 0644);
 506                                 if ( ! $wp_filesystem->copy($from . $filename, $to . $filename, true, FS_CHMOD_FILE) )
 507                                         return new WP_Error('copy_failed', __('Could not copy file.'), $to . $filename);
 508                         }
 509                 } elseif ( 'd' == $fileinfo['type'] ) {
 510                         if ( !$wp_filesystem->is_dir($to . $filename) ) {
 511                                 if ( !$wp_filesystem->mkdir($to . $filename, FS_CHMOD_DIR) )
 512                                         return new WP_Error('mkdir_failed', __('Could not create directory.'), $to . $filename);
 513                         }
 514                         $result = _copy_dir($from . $filename, $to . $filename, $skip_list);
 515                         if ( is_wp_error($result) )
 516                                 return $result;
 517                 }
 518         }
 519         return true;
 520 }
 521
 522 ?>