Wordpress 2.9.1
[autoinstalls/wordpress.git] / 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 ?>