Introduced version
* Directories should be noted by suffixing it with a trailing slash (/)
*
* @since 3.2.0
* @global array $_new_bundled_files
* @var array
* @name $_new_bundled_files
*/
global $_new_bundled_files;
$_new_bundled_files = array(
'plugins/akismet/' => '2.0',
'themes/twentyten/' => '3.0',
'themes/twentyeleven/' => '3.2'
);
/**
* 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 files in the {@link $_new_bundled_files} list will be added to the installation
* if the version is greater than or equal to the old version being 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.
* 4.1. Copy all files/folders other than wp-content
* 4.2. Copy any language files to WP_LANG_DIR (which may differ from WP_CONTENT_DIR
* 4.3. Copy any new bundled themes/plugins to their respective locations
* 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, $_new_bundled_files, $wpdb;
@set_time_limit( 300 );
$php_version = phpversion();
$mysql_version = $wpdb->db_version();
$required_php_version = '5.2.4';
$required_mysql_version = '5.0';
$wp_version = '3.4';
$php_compat = version_compare( $php_version, $required_php_version, '>=' );
if ( file_exists( WP_CONTENT_DIR . '/db.php' ) && empty( $wpdb->is_mysql ) )
$mysql_compat = true;
else
$mysql_compat = version_compare( $mysql_version, $required_mysql_version, '>=' );
if ( !$mysql_compat || !$php_compat )
$wp_filesystem->delete($from, true);
if ( !$mysql_compat && !$php_compat )
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, $mysql_version ) );
elseif ( !$php_compat )
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, $php_version ) );
elseif ( !$mysql_compat )
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 ) );
// Sanity check the unzipped distribution
apply_filters('update_feedback', __('Verifying the unpacked files…'));
$distro = '';
$roots = array( '/wordpress/', '/wordpress-mu/' );
foreach( $roots as $root ) {
if ( $wp_filesystem->exists($from . $root . 'readme.html') && $wp_filesystem->exists($from . $root . 'wp-includes/version.php') ) {
$distro = $root;
break;
}
}
if ( !$distro ) {
$wp_filesystem->delete($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 = '';
$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 . $distro, $to, array('wp-content') );
// Custom Content Directory needs updating now.
// Copy Languages
if ( !is_wp_error($result) && $wp_filesystem->is_dir($from . $distro . 'wp-content/languages') ) {
if ( WP_LANG_DIR != ABSPATH . WPINC . '/languages' || @is_dir(WP_LANG_DIR) )
$lang_dir = WP_LANG_DIR;
else
$lang_dir = WP_CONTENT_DIR . '/languages';
if ( !@is_dir($lang_dir) && 0 === strpos($lang_dir, ABSPATH) ) { // Check the language directory exists first
$wp_filesystem->mkdir($to . str_replace(ABSPATH, '', $lang_dir), FS_CHMOD_DIR); // If it's within the ABSPATH we can handle it here, otherwise they're out of luck.
clearstatcache(); // for FTP, Need to clear the stat cache
}
if ( @is_dir($lang_dir) ) {
$wp_lang_dir = $wp_filesystem->find_folder($lang_dir);
if ( $wp_lang_dir )
$result = copy_dir($from . $distro . 'wp-content/languages/', $wp_lang_dir);
}
}
// Copy New bundled plugins & themes
// This gives us the ability to install new plugins & themes bundled with future versions of WordPress whilst avoiding the re-install upon upgrade issue.
if ( !is_wp_error($result) && ( ! defined('CORE_UPGRADE_SKIP_NEW_BUNDLED') || ! CORE_UPGRADE_SKIP_NEW_BUNDLED ) ) {
$old_version = $GLOBALS['wp_version']; // $wp_version in local scope == new version
foreach ( (array) $_new_bundled_files as $file => $introduced_version ) {
// If $introduced version is greater than what the site was previously running
if ( version_compare($introduced_version, $old_version, '>') ) {
$directory = ('/' == $file[ strlen($file)-1 ]);
list($type, $filename) = explode('/', $file, 2);
if ( 'plugins' == $type )
$dest = $wp_filesystem->wp_plugins_dir();
elseif ( 'themes' == $type )
$dest = trailingslashit($wp_filesystem->wp_themes_dir()); // Back-compat, ::wp_themes_dir() did not return trailingslash'd pre-3.2
else
continue;
if ( ! $directory ) {
if ( $wp_filesystem->exists($dest . $filename) )
continue;
if ( ! $wp_filesystem->copy($from . $distro . 'wp-content/' . $file, $dest . $filename, FS_CHMOD_FILE) )
$result = new WP_Error('copy_failed', __('Could not copy file.'), $dest . $filename);
} else {
if ( $wp_filesystem->is_dir($dest . $filename) )
continue;
$wp_filesystem->mkdir($dest . $filename, FS_CHMOD_DIR);
$_result = copy_dir( $from . $distro . 'wp-content/' . $file, $dest . $filename);
if ( is_wp_error($_result) ) //If a error occurs partway through this final step, keep the error flowing through, but keep process going.
$result = $_result;
}
}
} //end foreach
}
// Handle $result error from the above blocks
if ( is_wp_error($result) ) {
$wp_filesystem->delete($maintenance_file);
$wp_filesystem->delete($from, 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_site_transient') )
delete_site_transient('update_core');
else
delete_option('update_core');
// Remove maintenance file, we're done.
$wp_filesystem->delete($maintenance_file);
// If we made it this far:
do_action( '_core_updated_successfully', $wp_version );
return $wp_version;
}
/**
* Copies a directory from one location to another via the WordPress Filesystem Abstraction.
* Assumes that WP_Filesystem() has already been called and setup.
*
* This is a temporary function for the 3.1 -> 3.2 upgrade only and will be removed in 3.3
*
* @ignore
* @since 3.2.0
* @see copy_dir()
*
* @param string $from source directory
* @param string $to destination directory
* @param array $skip_list a list of files/folders to skip copying
* @return mixed WP_Error on failure, True on success.
*/
function _copy_dir($from, $to, $skip_list = array() ) {
global $wp_filesystem;
$dirlist = $wp_filesystem->dirlist($from);
$from = trailingslashit($from);
$to = trailingslashit($to);
$skip_regex = '';
foreach ( (array)$skip_list as $key => $skip_file )
$skip_regex .= preg_quote($skip_file, '!') . '|';
if ( !empty($skip_regex) )
$skip_regex = '!(' . rtrim($skip_regex, '|') . ')$!i';
foreach ( (array) $dirlist as $filename => $fileinfo ) {
if ( !empty($skip_regex) )
if ( preg_match($skip_regex, $from . $filename) )
continue;
if ( 'f' == $fileinfo['type'] ) {
if ( ! $wp_filesystem->copy($from . $filename, $to . $filename, true, FS_CHMOD_FILE) ) {
// If copy failed, chmod file to 0644 and try again.
$wp_filesystem->chmod($to . $filename, 0644);
if ( ! $wp_filesystem->copy($from . $filename, $to . $filename, true, FS_CHMOD_FILE) )
return new WP_Error('copy_failed', __('Could not copy file.'), $to . $filename);
}
} elseif ( 'd' == $fileinfo['type'] ) {
if ( !$wp_filesystem->is_dir($to . $filename) ) {
if ( !$wp_filesystem->mkdir($to . $filename, FS_CHMOD_DIR) )
return new WP_Error('mkdir_failed', __('Could not create directory.'), $to . $filename);
}
$result = _copy_dir($from . $filename, $to . $filename, $skip_list);
if ( is_wp_error($result) )
return $result;
}
}
return true;
}
/**
* Redirect to the About WordPress page after a successful upgrade.
*
* This function is only needed when the existing install is older than 3.3.0 (3.4.0 for multisite).
*
* @since 3.3.0
*
*/
function _redirect_to_about_wordpress( $new_version ) {
global $wp_version, $pagenow, $action;
if ( is_multisite() ) {
// Change to self_admin_url().
if ( version_compare( $wp_version, '3.4-alpha', '>=' ) )
return;
} elseif ( version_compare( $wp_version, '3.3', '>=' ) ) {
return;
}
// Ensure we only run this on the update-core.php page. wp_update_core() could be called in other contexts.
if ( 'update-core.php' != $pagenow )
return;
if ( 'do-core-upgrade' != $action && 'do-core-reinstall' != $action )
return;
// Load the updated default text localization domain for new strings
load_default_textdomain();
// See do_core_upgrade()
show_message( __('WordPress updated successfully') );
show_message( '' . sprintf( __( 'Welcome to WordPress %1$s. You will be redirected to the About WordPress screen. If not, click here.' ), $new_version, esc_url( self_admin_url( 'about.php?updated' ) ) ) . '' );
show_message( '' . sprintf( __( 'Welcome to WordPress %1$s. Learn more.' ), $new_version, esc_url( self_admin_url( 'about.php?updated' ) ) ) . '' );
echo '';
?>