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WordPress/wp-admin/includes/update-core.php

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PHP
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<?php
/**
* WordPress core upgrade functionality.
*
* @package WordPress
* @subpackage Administration
* @since 2.7.0
*/
/**
* Stores files to be deleted.
*
* @since 2.7.0
* @global array $_old_files
* @var array
* @name $_old_files
*/
global $_old_files;
$_old_files = array(
'wp-admin/bookmarklet.php',
'wp-admin/css/upload.css',
'wp-admin/css/upload-rtl.css',
'wp-admin/css/press-this-ie.css',
'wp-admin/css/press-this-ie-rtl.css',
'wp-admin/edit-form.php',
'wp-admin/link-import.php',
'wp-admin/images/box-bg-left.gif',
'wp-admin/images/box-bg-right.gif',
'wp-admin/images/box-bg.gif',
'wp-admin/images/box-butt-left.gif',
'wp-admin/images/box-butt-right.gif',
'wp-admin/images/box-butt.gif',
'wp-admin/images/box-head-left.gif',
'wp-admin/images/box-head-right.gif',
'wp-admin/images/box-head.gif',
'wp-admin/images/heading-bg.gif',
'wp-admin/images/login-bkg-bottom.gif',
'wp-admin/images/login-bkg-tile.gif',
'wp-admin/images/notice.gif',
'wp-admin/images/toggle.gif',
'wp-admin/images/comment-stalk-classic.gif',
'wp-admin/images/comment-stalk-fresh.gif',
'wp-admin/images/comment-stalk-rtl.gif',
'wp-admin/images/comment-pill.gif',
'wp-admin/images/del.png',
'wp-admin/images/media-button-gallery.gif',
'wp-admin/images/media-buttons.gif',
'wp-admin/images/tail.gif',
'wp-admin/images/gear.png',
'wp-admin/images/tab.png',
'wp-admin/images/postbox-bg.gif',
'wp-admin/includes/upload.php',
'wp-admin/js/dbx-admin-key.js',
'wp-admin/js/link-cat.js',
'wp-admin/js/forms.js',
'wp-admin/js/upload.js',
'wp-admin/profile-update.php',
'wp-admin/templates.php',
'wp-includes/images/audio.png',
'wp-includes/images/css.png',
'wp-includes/images/default.png',
'wp-includes/images/doc.png',
'wp-includes/images/exe.png',
'wp-includes/images/html.png',
'wp-includes/images/js.png',
'wp-includes/images/pdf.png',
'wp-includes/images/swf.png',
'wp-includes/images/tar.png',
'wp-includes/images/text.png',
'wp-includes/images/video.png',
'wp-includes/images/zip.png',
'wp-includes/js/dbx.js',
'wp-includes/js/fat.js',
'wp-includes/js/list-manipulation.js',
'wp-includes/js/jquery/jquery.dimensions.min.js',
'wp-includes/js/tinymce/langs/en.js',
'wp-includes/js/tinymce/plugins/autosave/editor_plugin_src.js',
'wp-includes/js/tinymce/plugins/autosave/langs',
'wp-includes/js/tinymce/plugins/directionality/images',
'wp-includes/js/tinymce/plugins/directionality/langs',
'wp-includes/js/tinymce/plugins/inlinepopups/css',
'wp-includes/js/tinymce/plugins/inlinepopups/images',
'wp-includes/js/tinymce/plugins/inlinepopups/jscripts',
'wp-includes/js/tinymce/plugins/paste/images',
'wp-includes/js/tinymce/plugins/paste/jscripts',
'wp-includes/js/tinymce/plugins/paste/langs',
'wp-includes/js/tinymce/plugins/spellchecker/classes/HttpClient.class.php',
'wp-includes/js/tinymce/plugins/spellchecker/classes/TinyGoogleSpell.class.php',
'wp-includes/js/tinymce/plugins/spellchecker/classes/TinyPspell.class.php',
'wp-includes/js/tinymce/plugins/spellchecker/classes/TinyPspellShell.class.php',
'wp-includes/js/tinymce/plugins/spellchecker/css/spellchecker.css',
'wp-includes/js/tinymce/plugins/spellchecker/images',
'wp-includes/js/tinymce/plugins/spellchecker/langs',
'wp-includes/js/tinymce/plugins/spellchecker/tinyspell.php',
'wp-includes/js/tinymce/plugins/wordpress/images',
'wp-includes/js/tinymce/plugins/wordpress/langs',
'wp-includes/js/tinymce/plugins/wordpress/popups.css',
'wp-includes/js/tinymce/plugins/wordpress/wordpress.css',
'wp-includes/js/tinymce/plugins/wphelp',
'wp-includes/js/tinymce/themes/advanced/css',
'wp-includes/js/tinymce/themes/advanced/images',
'wp-includes/js/tinymce/themes/advanced/jscripts',
'wp-includes/js/tinymce/themes/advanced/langs',
'wp-includes/js/tinymce/tiny_mce_gzip.php',
'wp-includes/js/wp-ajax.js',
'wp-admin/admin-db.php',
'wp-admin/cat.js',
'wp-admin/categories.js',
'wp-admin/custom-fields.js',
'wp-admin/dbx-admin-key.js',
'wp-admin/edit-comments.js',
'wp-admin/install-rtl.css',
'wp-admin/install.css',
'wp-admin/upgrade-schema.php',
'wp-admin/upload-functions.php',
'wp-admin/upload-rtl.css',
'wp-admin/upload.css',
'wp-admin/upload.js',
'wp-admin/users.js',
'wp-admin/widgets-rtl.css',
'wp-admin/widgets.css',
'wp-admin/xfn.js',
'wp-includes/js/tinymce/license.html',
'wp-admin/cat-js.php',
'wp-admin/edit-form-ajax-cat.php',
'wp-admin/execute-pings.php',
'wp-admin/import/b2.php',
'wp-admin/inline-uploading.php',
'wp-admin/link-categories.php',
'wp-admin/list-manipulation.js',
'wp-admin/list-manipulation.php',
'wp-includes/comment-functions.php',
'wp-includes/feed-functions.php',
'wp-includes/functions-compat.php',
'wp-includes/functions-formatting.php',
'wp-includes/functions-post.php',
'wp-includes/js/dbx-key.js',
'wp-includes/js/tinymce/plugins/autosave/langs/cs.js',
'wp-includes/js/tinymce/plugins/autosave/langs/sv.js',
'wp-includes/js/tinymce/themes/advanced/editor_template_src.js',
'wp-includes/links.php',
'wp-includes/pluggable-functions.php',
'wp-includes/template-functions-author.php',
'wp-includes/template-functions-category.php',
'wp-includes/template-functions-general.php',
'wp-includes/template-functions-links.php',
'wp-includes/template-functions-post.php',
'wp-includes/wp-l10n.php',
'wp-admin/import-b2.php',
'wp-admin/import-blogger.php',
'wp-admin/import-greymatter.php',
'wp-admin/import-livejournal.php',
'wp-admin/import-mt.php',
'wp-admin/import-rss.php',
'wp-admin/import-textpattern.php',
'wp-admin/quicktags.js',
'wp-images/fade-butt.png',
'wp-images/get-firefox.png',
'wp-images/header-shadow.png',
'wp-images/smilies',
'wp-images/wp-small.png',
'wp-images/wpminilogo.png',
'wp.php'
);
/**
* Upgrade the core of WordPress.
*
* This will create a .maintenance file at the base of the WordPress directory
* to ensure that people can not access the web site, when the files are being
* copied to their locations.
*
* The files in the {@link $_old_files} list will be removed and the new files
* copied from the zip file after the database is upgraded.
*
* The steps for the upgrader for after the new release is downloaded and
* unzipped is:
* 1. Test unzipped location for select files to ensure that unzipped worked.
* 2. Create the .maintenance file in current WordPress base.
* 3. Copy new WordPress directory over old WordPress files.
* 4. Upgrade WordPress to new version.
* 5. Delete new WordPress directory path.
* 6. Delete .maintenance file.
* 7. Remove old files.
* 8. Delete 'update_core' option.
*
* There are several areas of failure. For instance if PHP times out before step
* 6, then you will not be able to access any portion of your site. Also, since
* the upgrade will not continue where it left off, you will not be able to
* automatically remove old files and remove the 'update_core' option. This
* isn't that bad.
*
* If the copy of the new WordPress over the old fails, then the worse is that
* the new WordPress directory will remain.
*
* If it is assumed that every file will be copied over, including plugins and
* themes, then if you edit the default theme, you should rename it, so that
* your changes remain.
*
* @since 2.7.0
*
* @param string $from New release unzipped path.
* @param string $to Path to old WordPress installation.
* @return WP_Error|null WP_Error on failure, null on success.
*/
function update_core($from, $to) {
global $wp_filesystem, $_old_files;
@set_time_limit( 300 );
// Sanity check the unzipped distribution
apply_filters('update_feedback', __('Verifying the unpacked files'));
if ( !$wp_filesystem->exists($from . '/wordpress/wp-settings.php') || !$wp_filesystem->exists($from . '/wordpress/wp-admin/admin.php') ||
!$wp_filesystem->exists($from . '/wordpress/wp-includes/functions.php') ) {
$wp_filesystem->delete($from, true);
return new WP_Error('insane_distro', __('The update could not be unpacked') );
}
apply_filters('update_feedback', __('Installing the latest version'));
// Create maintenance file to signal that we are upgrading
$maintenance_string = '<?php $upgrading = ' . time() . '; ?>';
$maintenance_file = $to . '.maintenance';
$wp_filesystem->delete($maintenance_file);
$wp_filesystem->put_contents($maintenance_file, $maintenance_string, FS_CHMOD_FILE);
// Copy new versions of WP files into place.
$result = copy_dir($from . '/wordpress', $to);
if ( is_wp_error($result) ) {
$wp_filesystem->delete($maintenance_file);
$wp_filesystem->delete($working_dir, true);
return $result;
}
// Remove old files
foreach ( $_old_files as $old_file ) {
$old_file = $to . $old_file;
if ( !$wp_filesystem->exists($old_file) )
continue;
$wp_filesystem->delete($old_file, true);
}
// Upgrade DB with separate request
apply_filters('update_feedback', __('Upgrading database'));
$db_upgrade_url = admin_url('upgrade.php?step=upgrade_db');
wp_remote_post($db_upgrade_url, array('timeout' => 60));
// Remove working directory
$wp_filesystem->delete($from, true);
// Force refresh of update information
if ( function_exists('delete_transient') )
delete_transient('update_core');
else
delete_option('update_core');
// Remove maintenance file, we're done.
$wp_filesystem->delete($maintenance_file);
}
?>
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