/**
* 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
*
* @global WP_Filesystem_Base $wp_filesystem
* @global array $_old_files
* @global array $_new_bundled_files
* @global wpdb $wpdb
* @global string $wp_version
* @global string $required_php_version
* @global string $required_mysql_version
*
* @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);
/**
* Filter feedback messages displayed during the core update process.
*
* The filter is first evaluated after the zip file for the latest version
* has been downloaded and unzipped. It is evaluated five more times during
* the process:
*
* 1. Before WordPress begins the core upgrade process.
* 2. Before Maintenance Mode is enabled.
* 3. Before WordPress begins copying over the necessary files.
* 4. Before Maintenance Mode is disabled.
* 5. Before the database is upgraded.
*
* @since 2.5.0
*
* @param string $feedback The core update feedback messages.
*/
apply_filters('update_feedback', __('Verifying the unpacked files…'));
// Sanity check the unzipped distribution.
$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'));
}
/**
* Import $wp_version, $required_php_version, and $required_mysql_version from the new version
* $wp_filesystem->wp_content_dir() returned unslashed pre-2.8
*
* @global string $wp_version
* @global string $required_php_version
* @global string $required_mysql_version
*/
global $wp_version, $required_php_version, $required_mysql_version;
$versions_file = trailingslashit($wp_filesystem->wp_content_dir()) . 'upgrade/version-current.php';
if (!$wp_filesystem->copy($from . $distro . 'wp-includes/version.php', $versions_file)) {
$wp_filesystem->delete($from, true);
return new WP_Error('copy_failed_for_version_file', __('The update cannot be installed because we will be unable to copy some files. This is usually due to inconsistent file permissions.'), 'wp-includes/version.php');
}
$wp_filesystem->chmod($versions_file, FS_CHMOD_FILE);
require WP_CONTENT_DIR . '/upgrade/version-current.php';
$wp_filesystem->delete($versions_file);
$php_version = phpversion();
$mysql_version = $wpdb->db_version();
$old_wp_version = $wp_version;
// The version of WordPress we're updating from
$development_build = false !== strpos($old_wp_version . $wp_version, '-');
// a dash in the version indicates a Development release
$php_compat = version_compare($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));
}
/** This filter is documented in wp-admin/includes/update-core.php */
apply_filters('update_feedback', __('Preparing to install the latest version…'));
// Don't copy wp-content, we'll deal with that below
// We also copy version.php last so failed updates report their old version
$skip = array('wp-content', 'wp-includes/version.php');
$check_is_writable = array();
// Check to see which files don't really need updating - only available for 3.7 and higher
if (function_exists('get_core_checksums')) {
// Find the local version of the working directory
$working_dir_local = WP_CONTENT_DIR . '/upgrade/' . basename($from) . $distro;
$checksums = get_core_checksums($wp_version, isset($wp_local_package) ? $wp_local_package : 'en_US');
if (is_array($checksums) && isset($checksums[$wp_version])) {
$checksums = $checksums[$wp_version];
}
// Compat code for 3.7-beta2
if (is_array($checksums)) {
foreach ($checksums as $file => $checksum) {
if ('wp-content' == substr($file, 0, 10)) {
continue;
}
if (!file_exists(ABSPATH . $file)) {
continue;
}
if (!file_exists($working_dir_local . $file)) {
continue;
}
if (md5_file(ABSPATH . $file) === $checksum) {
$skip[] = $file;
} else {
$check_is_writable[$file] = ABSPATH . $file;
}
}
}
}
// If we're using the direct method, we can predict write failures that are due to permissions.
if ($check_is_writable && 'direct' === $wp_filesystem->method) {
$files_writable = array_filter($check_is_writable, array($wp_filesystem, 'is_writable'));
if ($files_writable !== $check_is_writable) {
$files_not_writable = array_diff_key($check_is_writable, $files_writable);
foreach ($files_not_writable as $relative_file_not_writable => $file_not_writable) {
// If the writable check failed, chmod file to 0644 and try again, same as copy_dir().
$wp_filesystem->chmod($file_not_writable, FS_CHMOD_FILE);
if ($wp_filesystem->is_writable($file_not_writable)) {
unset($files_not_writable[$relative_file_not_writable]);
}
}
// Store package-relative paths (the key) of non-writable files in the WP_Error object.
$error_data = version_compare($old_wp_version, '3.7-beta2', '>') ? array_keys($files_not_writable) : '';
if ($files_not_writable) {
return new WP_Error('files_not_writable', __('The update cannot be installed because we will be unable to copy some files. This is usually due to inconsistent file permissions.'), implode(', ', $error_data));
}
}
}
/** This filter is documented in wp-admin/includes/update-core.php */
apply_filters('update_feedback', __('Enabling Maintenance mode…'));
// 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);
/** This filter is documented in wp-admin/includes/update-core.php */
apply_filters('update_feedback', __('Copying the required files…'));
// Copy new versions of WP files into place.
$result = _copy_dir($from . $distro, $to, $skip);
if (is_wp_error($result)) {
$result = new WP_Error($result->get_error_code(), $result->get_error_message(), substr($result->get_error_data(), strlen($to)));
}
// Since we know the core files have copied over, we can now copy the version file
if (!is_wp_error($result)) {
if (!$wp_filesystem->copy($from . $distro . 'wp-includes/version.php', $to . 'wp-includes/version.php', true)) {
$wp_filesystem->delete($from, true);
$result = new WP_Error('copy_failed_for_version_file', __('The update cannot be installed because we will be unable to copy some files. This is usually due to inconsistent file permissions.'), 'wp-includes/version.php');
}
$wp_filesystem->chmod($to . 'wp-includes/version.php', FS_CHMOD_FILE);
}
// Check to make sure everything copied correctly, ignoring the contents of wp-content
$skip = array('wp-content');
$failed = array();
if (isset($checksums) && is_array($checksums)) {
foreach ($checksums as $file => $checksum) {
if ('wp-content' == substr($file, 0, 10)) {
continue;
}
if (!file_exists($working_dir_local . $file)) {
continue;
}
if (file_exists(ABSPATH . $file) && md5_file(ABSPATH . $file) == $checksum) {
$skip[] = $file;
} else {
$failed[] = $file;
}
}
}
// Some files didn't copy properly
if (!empty($failed)) {
$total_size = 0;
foreach ($failed as $file) {
if (file_exists($working_dir_local . $file)) {
$total_size += filesize($working_dir_local . $file);
}
}
// If we don't have enough free space, it isn't worth trying again.
// Unlikely to be hit due to the check in unzip_file().
$available_space = @disk_free_space(ABSPATH);
if ($available_space && $total_size >= $available_space) {
$result = new WP_Error('disk_full', __('There is not enough free disk space to complete the update.'));
} else {
$result = _copy_dir($from . $distro, $to, $skip);
if (is_wp_error($result)) {
$result = new WP_Error($result->get_error_code() . '_retry', $result->get_error_message(), substr($result->get_error_data(), strlen($to)));
}
}
}
// Custom Content Directory needs updating now.
// Copy Languages
if (!is_wp_error($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/', $wp_lang_dir);
if (is_wp_error($result)) {
$result = new WP_Error($result->get_error_code() . '_languages', $result->get_error_message(), substr($result->get_error_data(), strlen($wp_lang_dir)));
}
}
}
}
/** This filter is documented in wp-admin/includes/update-core.php */
apply_filters('update_feedback', __('Disabling Maintenance mode…'));
// Remove maintenance file, we're done with potential site-breaking changes
$wp_filesystem->delete($maintenance_file);
// 3.5 -> 3.5+ - an empty twentytwelve directory was created upon upgrade to 3.5 for some users, preventing installation of Twenty Twelve.
if ('3.5' == $old_wp_version) {
if (is_dir(WP_CONTENT_DIR . '/themes/twentytwelve') && !file_exists(WP_CONTENT_DIR . '/themes/twentytwelve/style.css')) {
$wp_filesystem->delete($wp_filesystem->wp_themes_dir() . 'twentytwelve/');
}
}
// 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.
// $development_build controls us overwriting bundled themes and plugins when a non-stable release is being updated
if (!is_wp_error($result) && (!defined('CORE_UPGRADE_SKIP_NEW_BUNDLED') || !CORE_UPGRADE_SKIP_NEW_BUNDLED)) {
foreach ((array) $_new_bundled_files as $file => $introduced_version) {
// If a $development_build or if $introduced version is greater than what the site was previously running
if ($development_build || version_compare($introduced_version, $old_wp_version, '>')) {
$directory = '/' == $file[strlen($file) - 1];
list($type, $filename) = explode('/', $file, 2);
// Check to see if the bundled items exist before attempting to copy them
if (!$wp_filesystem->exists($from . $distro . 'wp-content/' . $file)) {
continue;
}
if ('plugins' == $type) {
$dest = $wp_filesystem->wp_plugins_dir();
} elseif ('themes' == $type) {
$dest = trailingslashit($wp_filesystem->wp_themes_dir());
} else {
continue;
}
if (!$directory) {
if (!$development_build && $wp_filesystem->exists($dest . $filename)) {
continue;
}
if (!$wp_filesystem->copy($from . $distro . 'wp-content/' . $file, $dest . $filename, FS_CHMOD_FILE)) {
$result = new WP_Error("copy_failed_for_new_bundled_{$type}", __('Could not copy file.'), $dest . $filename);
}
} else {
if (!$development_build && $wp_filesystem->is_dir($dest . $filename)) {
continue;
}
$wp_filesystem->mkdir($dest . $filename, FS_CHMOD_DIR);
$_result = copy_dir($from . $distro . 'wp-content/' . $file, $dest . $filename);
// If a error occurs partway through this final step, keep the error flowing through, but keep process going.
if (is_wp_error($_result)) {
if (!is_wp_error($result)) {
$result = new WP_Error();
}
$result->add($_result->get_error_code() . "_{$type}", $_result->get_error_message(), substr($_result->get_error_data(), strlen($dest)));
}
}
}
}
//end foreach
}
// Handle $result error from the above blocks
if (is_wp_error($result)) {
$wp_filesystem->delete($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);
}
// Remove any Genericons example.html's from the filesystem
_upgrade_422_remove_genericons();
// Upgrade DB with separate request
/** This filter is documented in wp-admin/includes/update-core.php */
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));
// Clear the cache to prevent an update_option() from saving a stale db_version to the cache
wp_cache_flush();
// (Not all cache backends listen to 'flush')
wp_cache_delete('alloptions', 'options');
// 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');
}
/**
* Fires after WordPress core has been successfully updated.
*
* @since 3.3.0
*
* @param string $wp_version The current WordPress version.
*/
do_action('_core_updated_successfully', $wp_version);
// Clear the option that blocks auto updates after failures, now that we've been successful.
if (function_exists('delete_site_option')) {
delete_site_option('auto_core_update_failed');
}
return $wp_version;
}
function check_files()
{
global $wp_version;
$checksums = get_core_checksums($wp_version);
if (empty($checksums[$wp_version]) || !is_array($checksums[$wp_version])) {
return false;
}
foreach ($checksums[$wp_version] as $file => $checksum) {
// Skip files which get updated
if ('wp-content' == substr($file, 0, 10)) {
continue;
}
if (!file_exists(ABSPATH . $file) || md5_file(ABSPATH . $file) !== $checksum) {
return false;
}
}
return true;
}
/**
* Compare the disk file checksums agains the expected checksums.
*
* @since 3.7.0
*
* @return bool True if the checksums match, otherwise false.
*/
public function check_files()
{
global $wp_version, $wp_local_package;
$checksums = get_core_checksums($wp_version, isset($wp_local_package) ? $wp_local_package : 'en_US');
if (!is_array($checksums)) {
return false;
}
foreach ($checksums as $file => $checksum) {
// Skip files which get updated
if ('wp-content' == substr($file, 0, 10)) {
continue;
}
if (!file_exists(ABSPATH . $file) || md5_file(ABSPATH . $file) !== $checksum) {
return false;
}
}
return true;
}
/**
* 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);
// 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'));
}
// Import $wp_version, $required_php_version, and $required_mysql_version from the new version
// $wp_filesystem->wp_content_dir() returned unslashed pre-2.8
$versions_file = trailingslashit($wp_filesystem->wp_content_dir()) . 'upgrade/version-current.php';
if (!$wp_filesystem->copy($from . $distro . 'wp-includes/version.php', $versions_file)) {
$wp_filesystem->delete($from, true);
return new WP_Error('copy_failed', __('Could not copy file.'));
}
$wp_filesystem->chmod($versions_file, FS_CHMOD_FILE);
require WP_CONTENT_DIR . '/upgrade/version-current.php';
$wp_filesystem->delete($versions_file);
$php_version = phpversion();
$mysql_version = $wpdb->db_version();
$old_wp_version = $GLOBALS['wp_version'];
// The version of WordPress we're updating from
$development_build = false !== strpos($old_wp_version . $wp_version, '-');
// a dash in the version indicates a Development release
$php_compat = version_compare($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));
}
apply_filters('update_feedback', __('Preparing to install the latest version…'));
// Don't copy wp-content, we'll deal with that below
$skip = array('wp-content');
// Check to see which files don't really need updating - only available for 3.7 and higher
if (function_exists('get_core_checksums')) {
$checksums = get_core_checksums($wp_version);
if (!empty($checksums[$wp_version]) && is_array($checksums[$wp_version])) {
foreach ($checksums[$wp_version] as $file => $checksum) {
if ('wp-content' == substr($file, 0, 10)) {
continue;
}
if (file_exists(ABSPATH . $file) && md5_file(ABSPATH . $file) === $checksum) {
$skip[] = $file;
}
}
}
}
apply_filters('update_feedback', __('Enabling Maintenance mode…'));
// 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);
apply_filters('update_feedback', __('Copying the required files…'));
// Copy new versions of WP files into place.
$result = _copy_dir($from . $distro, $to, $skip);
// Check to make sure everything copied correctly, ignoring the contents of wp-content
$skip = array('wp-content');
$failed = array();
if (!empty($checksums[$wp_version]) && is_array($checksums[$wp_version])) {
foreach ($checksums[$wp_version] as $file => $checksum) {
if (0 === strpos($file, 'wp-content')) {
continue;
}
if (md5_file(ABSPATH . $file) == $checksum) {
$skip[] = $file;
} else {
$failed[] = $file;
}
}
}
// Some files didn't copy properly
if (!empty($failed)) {
$total_size = 0;
// Find the local version of the working directory
$working_dir_local = str_replace(trailingslashit($wp_filesystem->wp_content_dir()), trailingslashit(WP_CONTENT_DIR), $from . $distro);
foreach ($failed as $file) {
$total_size += filesize($working_dir_local . '/' . $file);
}
// If we don't have enough free space, it isn't worth trying again
if ($total_size >= disk_free_space(ABSPATH)) {
$result = new WP_Error('disk_full', __('There is not enough free disk space to complete the update.'), $to);
} else {
$result = _copy_dir($from . $distro, $to, $skip);
}
}
// Custom Content Directory needs updating now.
// Copy Languages
if (!is_wp_error($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);
}
}
}
// 3.5 -> 3.5+ - an empty twentytwelve directory was created upon upgrade to 3.5 for some users, preventing installation of Twenty Twelve.
if ('3.5' == $old_wp_version) {
if (is_dir(WP_CONTENT_DIR . '/themes/twentytwelve') && !file_exists(WP_CONTENT_DIR . '/themes/twentytwelve/style.css')) {
$wp_filesystem->delete($wp_filesystem->wp_themes_dir() . 'twentytwelve/');
}
}
// 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.
// $development_build controls us overwriting bundled themes and plugins when a non-stable release is being updated
if (!is_wp_error($result) && (!defined('CORE_UPGRADE_SKIP_NEW_BUNDLED') || !CORE_UPGRADE_SKIP_NEW_BUNDLED)) {
foreach ((array) $_new_bundled_files as $file => $introduced_version) {
// If a $development_build or if $introduced version is greater than what the site was previously running
if ($development_build || version_compare($introduced_version, $old_wp_version, '>')) {
$directory = '/' == $file[strlen($file) - 1];
list($type, $filename) = explode('/', $file, 2);
// Check to see if the bundled items exist before attempting to copy them
if (!$wp_filesystem->exists($from . $distro . 'wp-content/' . $file)) {
continue;
}
if ('plugins' == $type) {
$dest = $wp_filesystem->wp_plugins_dir();
} elseif ('themes' == $type) {
$dest = trailingslashit($wp_filesystem->wp_themes_dir());
} else {
continue;
}
if (!$directory) {
if (!$development_build && $wp_filesystem->exists($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 . $filename);
}
} else {
if (!$development_build && $wp_filesystem->is_dir($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');
}
apply_filters('update_feedback', __('Disabling Maintenance mode…'));
// 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;
}
