WP_Upgrader WordPress Class
The WP_Upgrader class is used to upgrade/install WordPress. It is used by the WordPress core upgrade process, as well as the plugin and theme upgrade/install process. The class is located in /wp-admin/includes/class-wp-upgrader.php.
WP_Upgrader #
Core class used for upgrading/installing a local set of files via the Filesystem Abstraction classes from a Zip file.
Source
File: wp-admin/includes/class-wp-upgrader.php
class WP_Upgrader {
/**
* The error/notification strings used to update the user on the progress.
*
* @since 2.8.0
* @var array $strings
*/
public $strings = array();
/**
* The upgrader skin being used.
*
* @since 2.8.0
* @var Automatic_Upgrader_Skin|WP_Upgrader_Skin $skin
*/
public $skin = null;
/**
* The result of the installation.
*
* This is set by WP_Upgrader::install_package(), only when the package is installed
* successfully. It will then be an array, unless a WP_Error is returned by the
* {@see 'upgrader_post_install'} filter. In that case, the WP_Error will be assigned to
* it.
*
* @since 2.8.0
*
* @var array|WP_Error $result {
* @type string $source The full path to the source the files were installed from.
* @type string $source_files List of all the files in the source directory.
* @type string $destination The full path to the installation destination folder.
* @type string $destination_name The name of the destination folder, or empty if `$destination`
* and `$local_destination` are the same.
* @type string $local_destination The full local path to the destination folder. This is usually
* the same as `$destination`.
* @type string $remote_destination The full remote path to the destination folder
* (i.e., from `$wp_filesystem`).
* @type bool $clear_destination Whether the destination folder was cleared.
* }
*/
public $result = array();
/**
* The total number of updates being performed.
*
* Set by the bulk update methods.
*
* @since 3.0.0
* @var int $update_count
*/
public $update_count = 0;
/**
* The current update if multiple updates are being performed.
*
* Used by the bulk update methods, and incremented for each update.
*
* @since 3.0.0
* @var int
*/
public $update_current = 0;
/**
* Construct the upgrader with a skin.
*
* @since 2.8.0
*
* @param WP_Upgrader_Skin $skin The upgrader skin to use. Default is a WP_Upgrader_Skin
* instance.
*/
public function __construct( $skin = null ) {
if ( null === $skin ) {
$this->skin = new WP_Upgrader_Skin();
} else {
$this->skin = $skin;
}
}
/**
* Initialize the upgrader.
*
* This will set the relationship between the skin being used and this upgrader,
* and also add the generic strings to `WP_Upgrader::$strings`.
*
* @since 2.8.0
*/
public function init() {
$this->skin->set_upgrader( $this );
$this->generic_strings();
}
/**
* Add the generic strings to WP_Upgrader::$strings.
*
* @since 2.8.0
*/
public function generic_strings() {
$this->strings['bad_request'] = __( 'Invalid data provided.' );
$this->strings['fs_unavailable'] = __( 'Could not access filesystem.' );
$this->strings['fs_error'] = __( 'Filesystem error.' );
$this->strings['fs_no_root_dir'] = __( 'Unable to locate WordPress root directory.' );
$this->strings['fs_no_content_dir'] = __( 'Unable to locate WordPress content directory (wp-content).' );
$this->strings['fs_no_plugins_dir'] = __( 'Unable to locate WordPress plugin directory.' );
$this->strings['fs_no_themes_dir'] = __( 'Unable to locate WordPress theme directory.' );
/* translators: %s: Directory name. */
$this->strings['fs_no_folder'] = __( 'Unable to locate needed folder (%s).' );
$this->strings['download_failed'] = __( 'Download failed.' );
$this->strings['installing_package'] = __( 'Installing the latest version…' );
$this->strings['no_files'] = __( 'The package contains no files.' );
$this->strings['folder_exists'] = __( 'Destination folder already exists.' );
$this->strings['mkdir_failed'] = __( 'Could not create directory.' );
$this->strings['incompatible_archive'] = __( 'The package could not be installed.' );
$this->strings['files_not_writable'] = __( 'The update cannot be installed because some files could not be copied. This is usually due to inconsistent file permissions.' );
$this->strings['maintenance_start'] = __( 'Enabling Maintenance mode…' );
$this->strings['maintenance_end'] = __( 'Disabling Maintenance mode…' );
}
/**
* Connect to the filesystem.
*
* @since 2.8.0
*
* @global WP_Filesystem_Base $wp_filesystem WordPress filesystem subclass.
*
* @param string[] $directories Optional. Array of directories. If any of these do
* not exist, a WP_Error object will be returned.
* Default empty array.
* @param bool $allow_relaxed_file_ownership Whether to allow relaxed file ownership.
* Default false.
* @return bool|WP_Error True if able to connect, false or a WP_Error otherwise.
*/
public function fs_connect( $directories = array(), $allow_relaxed_file_ownership = false ) {
global $wp_filesystem;
$credentials = $this->skin->request_filesystem_credentials( false, $directories[0], $allow_relaxed_file_ownership );
if ( false === $credentials ) {
return false;
}
if ( ! WP_Filesystem( $credentials, $directories[0], $allow_relaxed_file_ownership ) ) {
$error = true;
if ( is_object( $wp_filesystem ) && $wp_filesystem->errors->has_errors() ) {
$error = $wp_filesystem->errors;
}
// Failed to connect. Error and request again.
$this->skin->request_filesystem_credentials( $error, $directories[0], $allow_relaxed_file_ownership );
return false;
}
if ( ! is_object( $wp_filesystem ) ) {
return new WP_Error( 'fs_unavailable', $this->strings['fs_unavailable'] );
}
if ( is_wp_error( $wp_filesystem->errors ) && $wp_filesystem->errors->has_errors() ) {
return new WP_Error( 'fs_error', $this->strings['fs_error'], $wp_filesystem->errors );
}
foreach ( (array) $directories as $dir ) {
switch ( $dir ) {
case ABSPATH:
if ( ! $wp_filesystem->abspath() ) {
return new WP_Error( 'fs_no_root_dir', $this->strings['fs_no_root_dir'] );
}
break;
case WP_CONTENT_DIR:
if ( ! $wp_filesystem->wp_content_dir() ) {
return new WP_Error( 'fs_no_content_dir', $this->strings['fs_no_content_dir'] );
}
break;
case WP_PLUGIN_DIR:
if ( ! $wp_filesystem->wp_plugins_dir() ) {
return new WP_Error( 'fs_no_plugins_dir', $this->strings['fs_no_plugins_dir'] );
}
break;
case get_theme_root():
if ( ! $wp_filesystem->wp_themes_dir() ) {
return new WP_Error( 'fs_no_themes_dir', $this->strings['fs_no_themes_dir'] );
}
break;
default:
if ( ! $wp_filesystem->find_folder( $dir ) ) {
return new WP_Error( 'fs_no_folder', sprintf( $this->strings['fs_no_folder'], esc_html( basename( $dir ) ) ) );
}
break;
}
}
return true;
}
/**
* Download a package.
*
* @since 2.8.0
* @since 5.2.0 Added the `$check_signatures` parameter.
* @since 5.5.0 Added the `$hook_extra` parameter.
*
* @param string $package The URI of the package. If this is the full path to an
* existing local file, it will be returned untouched.
* @param bool $check_signatures Whether to validate file signatures. Default false.
* @param array $hook_extra Extra arguments to pass to the filter hooks. Default empty array.
* @return string|WP_Error The full path to the downloaded package file, or a WP_Error object.
*/
public function download_package( $package, $check_signatures = false, $hook_extra = array() ) {
/**
* Filters whether to return the package.
*
* @since 3.7.0
* @since 5.5.0 Added the `$hook_extra` parameter.
*
* @param bool $reply Whether to bail without returning the package.
* Default false.
* @param string $package The package file name.
* @param WP_Upgrader $upgrader The WP_Upgrader instance.
* @param array $hook_extra Extra arguments passed to hooked filters.
*/
$reply = apply_filters( 'upgrader_pre_download', false, $package, $this, $hook_extra );
if ( false !== $reply ) {
return $reply;
}
if ( ! preg_match( '!^(http|https|ftp)://!i', $package ) && file_exists( $package ) ) { // Local file or remote?
return $package; // Must be a local file.
}
if ( empty( $package ) ) {
return new WP_Error( 'no_package', $this->strings['no_package'] );
}
$this->skin->feedback( 'downloading_package', $package );
$download_file = download_url( $package, 300, $check_signatures );
if ( is_wp_error( $download_file ) && ! $download_file->get_error_data( 'softfail-filename' ) ) {
return new WP_Error( 'download_failed', $this->strings['download_failed'], $download_file->get_error_message() );
}
return $download_file;
}
/**
* Unpack a compressed package file.
*
* @since 2.8.0
*
* @global WP_Filesystem_Base $wp_filesystem WordPress filesystem subclass.
*
* @param string $package Full path to the package file.
* @param bool $delete_package Optional. Whether to delete the package file after attempting
* to unpack it. Default true.
* @return string|WP_Error The path to the unpacked contents, or a WP_Error on failure.
*/
public function unpack_package( $package, $delete_package = true ) {
global $wp_filesystem;
$this->skin->feedback( 'unpack_package' );
$upgrade_folder = $wp_filesystem->wp_content_dir() . 'upgrade/';
// Clean up contents of upgrade directory beforehand.
$upgrade_files = $wp_filesystem->dirlist( $upgrade_folder );
if ( ! empty( $upgrade_files ) ) {
foreach ( $upgrade_files as $file ) {
$wp_filesystem->delete( $upgrade_folder . $file['name'], true );
}
}
// We need a working directory - strip off any .tmp or .zip suffixes.
$working_dir = $upgrade_folder . basename( basename( $package, '.tmp' ), '.zip' );
// Clean up working directory.
if ( $wp_filesystem->is_dir( $working_dir ) ) {
$wp_filesystem->delete( $working_dir, true );
}
// Unzip package to working directory.
$result = unzip_file( $package, $working_dir );
// Once extracted, delete the package if required.
if ( $delete_package ) {
unlink( $package );
}
if ( is_wp_error( $result ) ) {
$wp_filesystem->delete( $working_dir, true );
if ( 'incompatible_archive' === $result->get_error_code() ) {
return new WP_Error( 'incompatible_archive', $this->strings['incompatible_archive'], $result->get_error_data() );
}
return $result;
}
return $working_dir;
}
/**
* Flatten the results of WP_Filesystem_Base::dirlist() for iterating over.
*
* @since 4.9.0
* @access protected
*
* @param array $nested_files Array of files as returned by WP_Filesystem_Base::dirlist().
* @param string $path Relative path to prepend to child nodes. Optional.
* @return array A flattened array of the $nested_files specified.
*/
protected function flatten_dirlist( $nested_files, $path = '' ) {
$files = array();
foreach ( $nested_files as $name => $details ) {
$files[ $path . $name ] = $details;
// Append children recursively.
if ( ! empty( $details['files'] ) ) {
$children = $this->flatten_dirlist( $details['files'], $path . $name . '/' );
// Merge keeping possible numeric keys, which array_merge() will reindex from 0..n.
$files = $files + $children;
}
}
return $files;
}
/**
* Clears the directory where this item is going to be installed into.
*
* @since 4.3.0
*
* @global WP_Filesystem_Base $wp_filesystem WordPress filesystem subclass.
*
* @param string $remote_destination The location on the remote filesystem to be cleared.
* @return true|WP_Error True upon success, WP_Error on failure.
*/
public function clear_destination( $remote_destination ) {
global $wp_filesystem;
$files = $wp_filesystem->dirlist( $remote_destination, true, true );
// False indicates that the $remote_destination doesn't exist.
if ( false === $files ) {
return true;
}
// Flatten the file list to iterate over.
$files = $this->flatten_dirlist( $files );
// Check all files are writable before attempting to clear the destination.
$unwritable_files = array();
// Check writability.
foreach ( $files as $filename => $file_details ) {
if ( ! $wp_filesystem->is_writable( $remote_destination . $filename ) ) {
// Attempt to alter permissions to allow writes and try again.
$wp_filesystem->chmod( $remote_destination . $filename, ( 'd' === $file_details['type'] ? FS_CHMOD_DIR : FS_CHMOD_FILE ) );
if ( ! $wp_filesystem->is_writable( $remote_destination . $filename ) ) {
$unwritable_files[] = $filename;
}
}
}
if ( ! empty( $unwritable_files ) ) {
return new WP_Error( 'files_not_writable', $this->strings['files_not_writable'], implode( ', ', $unwritable_files ) );
}
if ( ! $wp_filesystem->delete( $remote_destination, true ) ) {
return new WP_Error( 'remove_old_failed', $this->strings['remove_old_failed'] );
}
return true;
}
/**
* Install a package.
*
* Copies the contents of a package from a source directory, and installs them in
* a destination directory. Optionally removes the source. It can also optionally
* clear out the destination folder if it already exists.
*
* @since 2.8.0
*
* @global WP_Filesystem_Base $wp_filesystem WordPress filesystem subclass.
* @global array $wp_theme_directories
*
* @param array|string $args {
* Optional. Array or string of arguments for installing a package. Default empty array.
*
* @type string $source Required path to the package source. Default empty.
* @type string $destination Required path to a folder to install the package in.
* Default empty.
* @type bool $clear_destination Whether to delete any files already in the destination
* folder. Default false.
* @type bool $clear_working Whether to delete the files from the working directory
* after copying them to the destination. Default false.
* @type bool $abort_if_destination_exists Whether to abort the installation if
* the destination folder already exists. Default true.
* @type array $hook_extra Extra arguments to pass to the filter hooks called by
* WP_Upgrader::install_package(). Default empty array.
* }
*
* @return array|WP_Error The result (also stored in `WP_Upgrader::$result`), or a WP_Error on failure.
*/
public function install_package( $args = array() ) {
global $wp_filesystem, $wp_theme_directories;
$defaults = array(
'source' => '', // Please always pass this.
'destination' => '', // ...and this.
'clear_destination' => false,
'clear_working' => false,
'abort_if_destination_exists' => true,
'hook_extra' => array(),
);
$args = wp_parse_args( $args, $defaults );
// These were previously extract()'d.
$source = $args['source'];
$destination = $args['destination'];
$clear_destination = $args['clear_destination'];
set_time_limit( 300 );
if ( empty( $source ) || empty( $destination ) ) {
return new WP_Error( 'bad_request', $this->strings['bad_request'] );
}
$this->skin->feedback( 'installing_package' );
/**
* Filters the installation response before the installation has started.
*
* Returning a value that could be evaluated as a `WP_Error` will effectively
* short-circuit the installation, returning that value instead.
*
* @since 2.8.0
*
* @param bool|WP_Error $response Installation response.
* @param array $hook_extra Extra arguments passed to hooked filters.
*/
$res = apply_filters( 'upgrader_pre_install', true, $args['hook_extra'] );
if ( is_wp_error( $res ) ) {
return $res;
}
// Retain the original source and destinations.
$remote_source = $args['source'];
$local_destination = $destination;
$source_files = array_keys( $wp_filesystem->dirlist( $remote_source ) );
$remote_destination = $wp_filesystem->find_folder( $local_destination );
// Locate which directory to copy to the new folder. This is based on the actual folder holding the files.
if ( 1 === count( $source_files ) && $wp_filesystem->is_dir( trailingslashit( $args['source'] ) . $source_files[0] . '/' ) ) {
// Only one folder? Then we want its contents.
$source = trailingslashit( $args['source'] ) . trailingslashit( $source_files[0] );
} elseif ( 0 === count( $source_files ) ) {
// There are no files?
return new WP_Error( 'incompatible_archive_empty', $this->strings['incompatible_archive'], $this->strings['no_files'] );
} else {
// It's only a single file, the upgrader will use the folder name of this file as the destination folder.
// Folder name is based on zip filename.
$source = trailingslashit( $args['source'] );
}
/**
* Filters the source file location for the upgrade package.
*
* @since 2.8.0
* @since 4.4.0 The $hook_extra parameter became available.
*
* @param string $source File source location.
* @param string $remote_source Remote file source location.
* @param WP_Upgrader $upgrader WP_Upgrader instance.
* @param array $hook_extra Extra arguments passed to hooked filters.
*/
$source = apply_filters( 'upgrader_source_selection', $source, $remote_source, $this, $args['hook_extra'] );
if ( is_wp_error( $source ) ) {
return $source;
}
// Has the source location changed? If so, we need a new source_files list.
if ( $source !== $remote_source ) {
$source_files = array_keys( $wp_filesystem->dirlist( $source ) );
}
/*
* Protection against deleting files in any important base directories.
* Theme_Upgrader & Plugin_Upgrader also trigger this, as they pass the
* destination directory (WP_PLUGIN_DIR / wp-content/themes) intending
* to copy the directory into the directory, whilst they pass the source
* as the actual files to copy.
*/
$protected_directories = array( ABSPATH, WP_CONTENT_DIR, WP_PLUGIN_DIR, WP_CONTENT_DIR . '/themes' );
if ( is_array( $wp_theme_directories ) ) {
$protected_directories = array_merge( $protected_directories, $wp_theme_directories );
}
if ( in_array( $destination, $protected_directories, true ) ) {
$remote_destination = trailingslashit( $remote_destination ) . trailingslashit( basename( $source ) );
$destination = trailingslashit( $destination ) . trailingslashit( basename( $source ) );
}
if ( $clear_destination ) {
// We're going to clear the destination if there's something there.
$this->skin->feedback( 'remove_old' );
$removed = $this->clear_destination( $remote_destination );
/**
* Filters whether the upgrader cleared the destination.
*
* @since 2.8.0
*
* @param true|WP_Error $removed Whether the destination was cleared.
* True upon success, WP_Error on failure.
* @param string $local_destination The local package destination.
* @param string $remote_destination The remote package destination.
* @param array $hook_extra Extra arguments passed to hooked filters.
*/
$removed = apply_filters( 'upgrader_clear_destination', $removed, $local_destination, $remote_destination, $args['hook_extra'] );
if ( is_wp_error( $removed ) ) {
return $removed;
}
} elseif ( $args['abort_if_destination_exists'] && $wp_filesystem->exists( $remote_destination ) ) {
// If we're not clearing the destination folder and something exists there already, bail.
// But first check to see if there are actually any files in the folder.
$_files = $wp_filesystem->dirlist( $remote_destination );
if ( ! empty( $_files ) ) {
$wp_filesystem->delete( $remote_source, true ); // Clear out the source files.
return new WP_Error( 'folder_exists', $this->strings['folder_exists'], $remote_destination );
}
}
// Create destination if needed.
if ( ! $wp_filesystem->exists( $remote_destination ) ) {
if ( ! $wp_filesystem->mkdir( $remote_destination, FS_CHMOD_DIR ) ) {
return new WP_Error( 'mkdir_failed_destination', $this->strings['mkdir_failed'], $remote_destination );
}
}
// Copy new version of item into place.
$result = copy_dir( $source, $remote_destination );
if ( is_wp_error( $result ) ) {
if ( $args['clear_working'] ) {
$wp_filesystem->delete( $remote_source, true );
}
return $result;
}
// Clear the working folder?
if ( $args['clear_working'] ) {
$wp_filesystem->delete( $remote_source, true );
}
$destination_name = basename( str_replace( $local_destination, '', $destination ) );
if ( '.' === $destination_name ) {
$destination_name = '';
}
$this->result = compact( 'source', 'source_files', 'destination', 'destination_name', 'local_destination', 'remote_destination', 'clear_destination' );
/**
* Filters the installation response after the installation has finished.
*
* @since 2.8.0
*
* @param bool $response Installation response.
* @param array $hook_extra Extra arguments passed to hooked filters.
* @param array $result Installation result data.
*/
$res = apply_filters( 'upgrader_post_install', true, $args['hook_extra'], $this->result );
if ( is_wp_error( $res ) ) {
$this->result = $res;
return $res;
}
// Bombard the calling function will all the info which we've just used.
return $this->result;
}
/**
* Run an upgrade/installation.
*
* Attempts to download the package (if it is not a local file), unpack it, and
* install it in the destination folder.
*
* @since 2.8.0
*
* @param array $options {
* Array or string of arguments for upgrading/installing a package.
*
* @type string $package The full path or URI of the package to install.
* Default empty.
* @type string $destination The full path to the destination folder.
* Default empty.
* @type bool $clear_destination Whether to delete any files already in the
* destination folder. Default false.
* @type bool $clear_working Whether to delete the files from the working
* directory after copying them to the destination.
* Default true.
* @type bool $abort_if_destination_exists Whether to abort the installation if the destination
* folder already exists. When true, `$clear_destination`
* should be false. Default true.
* @type bool $is_multi Whether this run is one of multiple upgrade/installation
* actions being performed in bulk. When true, the skin
* WP_Upgrader::header() and WP_Upgrader::footer()
* aren't called. Default false.
* @type array $hook_extra Extra arguments to pass to the filter hooks called by
* WP_Upgrader::run().
* }
* @return array|false|WP_Error The result from self::install_package() on success, otherwise a WP_Error,
* or false if unable to connect to the filesystem.
*/
public function run( $options ) {
$defaults = array(
'package' => '', // Please always pass this.
'destination' => '', // ...and this.
'clear_destination' => false,
'clear_working' => true,
'abort_if_destination_exists' => true, // Abort if the destination directory exists. Pass clear_destination as false please.
'is_multi' => false,
'hook_extra' => array(), // Pass any extra $hook_extra args here, this will be passed to any hooked filters.
);
$options = wp_parse_args( $options, $defaults );
/**
* Filters the package options before running an update.
*
* See also {@see 'upgrader_process_complete'}.
*
* @since 4.3.0
*
* @param array $options {
* Options used by the upgrader.
*
* @type string $package Package for update.
* @type string $destination Update location.
* @type bool $clear_destination Clear the destination resource.
* @type bool $clear_working Clear the working resource.
* @type bool $abort_if_destination_exists Abort if the Destination directory exists.
* @type bool $is_multi Whether the upgrader is running multiple times.
* @type array $hook_extra {
* Extra hook arguments.
*
* @type string $action Type of action. Default 'update'.
* @type string $type Type of update process. Accepts 'plugin', 'theme', or 'core'.
* @type bool $bulk Whether the update process is a bulk update. Default true.
* @type string $plugin Path to the plugin file relative to the plugins directory.
* @type string $theme The stylesheet or template name of the theme.
* @type string $language_update_type The language pack update type. Accepts 'plugin', 'theme',
* or 'core'.
* @type object $language_update The language pack update offer.
* }
* }
*/
$options = apply_filters( 'upgrader_package_options', $options );
if ( ! $options['is_multi'] ) { // Call $this->header separately if running multiple times.
$this->skin->header();
}
// Connect to the filesystem first.
$res = $this->fs_connect( array( WP_CONTENT_DIR, $options['destination'] ) );
// Mainly for non-connected filesystem.
if ( ! $res ) {
if ( ! $options['is_multi'] ) {
$this->skin->footer();
}
return false;
}
$this->skin->before();
if ( is_wp_error( $res ) ) {
$this->skin->error( $res );
$this->skin->after();
if ( ! $options['is_multi'] ) {
$this->skin->footer();
}
return $res;
}
/*
* Download the package. Note: If the package is the full path
* to an existing local file, it will be returned untouched.
*/
$download = $this->download_package( $options['package'], true, $options['hook_extra'] );
// Allow for signature soft-fail.
// WARNING: This may be removed in the future.
if ( is_wp_error( $download ) && $download->get_error_data( 'softfail-filename' ) ) {
// Don't output the 'no signature could be found' failure message for now.
if ( 'signature_verification_no_signature' !== $download->get_error_code() || WP_DEBUG ) {
// Output the failure error as a normal feedback, and not as an error.
$this->skin->feedback( $download->get_error_message() );
// Report this failure back to WordPress.org for debugging purposes.
wp_version_check(
array(
'signature_failure_code' => $download->get_error_code(),
'signature_failure_data' => $download->get_error_data(),
)
);
}
// Pretend this error didn't happen.
$download = $download->get_error_data( 'softfail-filename' );
}
if ( is_wp_error( $download ) ) {
$this->skin->error( $download );
$this->skin->after();
if ( ! $options['is_multi'] ) {
$this->skin->footer();
}
return $download;
}
$delete_package = ( $download !== $options['package'] ); // Do not delete a "local" file.
// Unzips the file into a temporary directory.
$working_dir = $this->unpack_package( $download, $delete_package );
if ( is_wp_error( $working_dir ) ) {
$this->skin->error( $working_dir );
$this->skin->after();
if ( ! $options['is_multi'] ) {
$this->skin->footer();
}
return $working_dir;
}
// With the given options, this installs it to the destination directory.
$result = $this->install_package(
array(
'source' => $working_dir,
'destination' => $options['destination'],
'clear_destination' => $options['clear_destination'],
'abort_if_destination_exists' => $options['abort_if_destination_exists'],
'clear_working' => $options['clear_working'],
'hook_extra' => $options['hook_extra'],
)
);
/**
* Filters the result of WP_Upgrader::install_package().
*
* @since 5.7.0
*
* @param array|WP_Error $result Result from WP_Upgrader::install_package().
* @param array $hook_extra Extra arguments passed to hooked filters.
*/
$result = apply_filters( 'upgrader_install_package_result', $result, $options['hook_extra'] );
$this->skin->set_result( $result );
if ( is_wp_error( $result ) ) {
$this->skin->error( $result );
if ( ! method_exists( $this->skin, 'hide_process_failed' ) || ! $this->skin->hide_process_failed( $result ) ) {
$this->skin->feedback( 'process_failed' );
}
} else {
// Installation succeeded.
$this->skin->feedback( 'process_success' );
}
$this->skin->after();
if ( ! $options['is_multi'] ) {
/**
* Fires when the upgrader process is complete.
*
* See also {@see 'upgrader_package_options'}.
*
* @since 3.6.0
* @since 3.7.0 Added to WP_Upgrader::run().
* @since 4.6.0 `$translations` was added as a possible argument to `$hook_extra`.
*
* @param WP_Upgrader $upgrader WP_Upgrader instance. In other contexts this might be a
* Theme_Upgrader, Plugin_Upgrader, Core_Upgrade, or Language_Pack_Upgrader instance.
* @param array $hook_extra {
* Array of bulk item update data.
*
* @type string $action Type of action. Default 'update'.
* @type string $type Type of update process. Accepts 'plugin', 'theme', 'translation', or 'core'.
* @type bool $bulk Whether the update process is a bulk update. Default true.
* @type array $plugins Array of the basename paths of the plugins' main files.
* @type array $themes The theme slugs.
* @type array $translations {
* Array of translations update data.
*
* @type string $language The locale the translation is for.
* @type string $type Type of translation. Accepts 'plugin', 'theme', or 'core'.
* @type string $slug Text domain the translation is for. The slug of a theme/plugin or
* 'default' for core translations.
* @type string $version The version of a theme, plugin, or core.
* }
* }
*/
do_action( 'upgrader_process_complete', $this, $options['hook_extra'] );
$this->skin->footer();
}
return $result;
}
/**
* Toggle maintenance mode for the site.
*
* Creates/deletes the maintenance file to enable/disable maintenance mode.
*
* @since 2.8.0
*
* @global WP_Filesystem_Base $wp_filesystem WordPress filesystem subclass.
*
* @param bool $enable True to enable maintenance mode, false to disable.
*/
public function maintenance_mode( $enable = false ) {
global $wp_filesystem;
$file = $wp_filesystem->abspath() . '.maintenance';
if ( $enable ) {
$this->skin->feedback( 'maintenance_start' );
// Create maintenance file to signal that we are upgrading.
$maintenance_string = '<?php $upgrading = ' . time() . '; ?>';
$wp_filesystem->delete( $file );
$wp_filesystem->put_contents( $file, $maintenance_string, FS_CHMOD_FILE );
} elseif ( ! $enable && $wp_filesystem->exists( $file ) ) {
$this->skin->feedback( 'maintenance_end' );
$wp_filesystem->delete( $file );
}
}
/**
* Creates a lock using WordPress options.
*
* @since 4.5.0
*
* @param string $lock_name The name of this unique lock.
* @param int $release_timeout Optional. The duration in seconds to respect an existing lock.
* Default: 1 hour.
* @return bool False if a lock couldn't be created or if the lock is still valid. True otherwise.
*/
public static function create_lock( $lock_name, $release_timeout = null ) {
global $wpdb;
if ( ! $release_timeout ) {
$release_timeout = HOUR_IN_SECONDS;
}
$lock_option = $lock_name . '.lock';
// Try to lock.
$lock_result = $wpdb->query( $wpdb->prepare( "INSERT IGNORE INTO `$wpdb->options` ( `option_name`, `option_value`, `autoload` ) VALUES (%s, %s, 'no') /* LOCK */", $lock_option, time() ) );
if ( ! $lock_result ) {
$lock_result = get_option( $lock_option );
// If a lock couldn't be created, and there isn't a lock, bail.
if ( ! $lock_result ) {
return false;
}
// Check to see if the lock is still valid. If it is, bail.
if ( $lock_result > ( time() - $release_timeout ) ) {
return false;
}
// There must exist an expired lock, clear it and re-gain it.
WP_Upgrader::release_lock( $lock_name );
return WP_Upgrader::create_lock( $lock_name, $release_timeout );
}
// Update the lock, as by this point we've definitely got a lock, just need to fire the actions.
update_option( $lock_option, time() );
return true;
}
/**
* Releases an upgrader lock.
*
* @since 4.5.0
*
* @see WP_Upgrader::create_lock()
*
* @param string $lock_name The name of this unique lock.
* @return bool True if the lock was successfully released. False on failure.
*/
public static function release_lock( $lock_name ) {
return delete_option( $lock_name . '.lock' );
}
}
Expand full source codeCollapse full source codeView on TracView on GitHub
Methods
- __construct— Construct the upgrader with a skin.
- clear_destination— Clears the directory where this item is going to be installed into.
- create_lock— Creates a lock using WordPress options.
- download_package— Download a package.
- flatten_dirlist— Flatten the results of WP_Filesystem_Base::dirlist() for iterating over.
- fs_connect— Connect to the filesystem.
- generic_strings— Add the generic strings to WP_Upgrader::$strings.
- init— Initialize the upgrader.
- install_package— Install a package.
- maintenance_mode— Toggle maintenance mode for the site.
- release_lock— Releases an upgrader lock.
- run— Run an upgrade/installation.
- unpack_package— Unpack a compressed package file.
Changelog
| Version | Description |
|---|---|
| 2.8.0 | Introduced. |