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 );
 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 ?>