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Edit File : class-core-upgrader.php \| Size : 14.83 KB
<?php /** * Upgrade API: Core_Upgrader class * * @package WordPress * @subpackage Upgrader * @since 4.6.0 / /* * Core class used for updating core. * * It allows for WordPress to upgrade itself in combination with * the wp-admin/includes/update-core.php file. * * Note: Newly introduced functions and methods cannot be used here. * All functions must be present in the previous version being upgraded from * as this file is used there too. * * @since 2.8.0 * @since 4.6.0 Moved to its own file from wp-admin/includes/class-wp-upgrader.php. * * @see WP_Upgrader / class Core_Upgrader extends WP_Upgrader { /* * Initializes the upgrade strings. * * @since 2.8.0 / public function upgrade_strings() { $this->strings['up_to_date'] = __( 'WordPress is at the latest version.' ); $this->strings['locked'] = __( 'Another update is currently in progress.' ); $this->strings['no_package'] = __( 'Update package not available.' ); / translators: %s: Package URL. / $this->strings['downloading_package'] = sprintf( __( 'Downloading update from %s…' ), '<span class="code pre">%s</span>' ); $this->strings['unpack_package'] = __( 'Unpacking the update…' ); $this->strings['copy_failed'] = __( 'Could not copy files.' ); $this->strings['copy_failed_space'] = __( 'Could not copy files. You may have run out of disk space.' ); $this->strings['start_rollback'] = __( 'Attempting to restore the previous version.' ); $this->strings['rollback_was_required'] = __( 'Due to an error during updating, WordPress has been restored to your previous version.' ); } /* * Upgrades WordPress core. * * @since 2.8.0 * * @global WP_Filesystem_Base $wp_filesystem WordPress filesystem subclass. * @global callable $_wp_filesystem_direct_method * * @param object $current Response object for whether WordPress is current. * @param array $args { * Optional. Arguments for upgrading WordPress core. Default empty array. * * @type bool $pre_check_md5 Whether to check the file checksums before * attempting the upgrade. Default true. * @type bool $attempt_rollback Whether to attempt to rollback the chances if * there is a problem. Default false. * @type bool $do_rollback Whether to perform this "upgrade" as a rollback. * Default false. * } * @return string\|false\|WP_Error New WordPress version on success, false or WP_Error on failure. / public function upgrade( $current, $args = array() ) { global $wp_filesystem; require ABSPATH . WPINC . '/version.php'; // $wp_version; $start_time = time(); $defaults = array( 'pre_check_md5' => true, 'attempt_rollback' => false, 'do_rollback' => false, 'allow_relaxed_file_ownership' => false, ); $parsed_args = wp_parse_args( $args, $defaults ); $this->init(); $this->upgrade_strings(); // Is an update available? if ( ! isset( $current->response ) \|\| 'latest' === $current->response ) { return new WP_Error( 'up_to_date', $this->strings['up_to_date'] ); } $res = $this->fs_connect( array( ABSPATH, WP_CONTENT_DIR ), $parsed_args['allow_relaxed_file_ownership'] ); if ( ! $res \|\| is_wp_error( $res ) ) { return $res; } $wp_dir = trailingslashit( $wp_filesystem->abspath() ); $partial = true; if ( $parsed_args['do_rollback'] ) { $partial = false; } elseif ( $parsed_args['pre_check_md5'] && ! $this->check_files() ) { $partial = false; } / * If partial update is returned from the API, use that, unless we're doing * a reinstallation. If we cross the new_bundled version number, then use * the new_bundled zip. Don't though if the constant is set to skip bundled items. * If the API returns a no_content zip, go with it. Finally, default to the full zip. / if ( $parsed_args['do_rollback'] && $current->packages->rollback ) { $to_download = 'rollback'; } elseif ( $current->packages->partial && 'reinstall' !== $current->response && $wp_version === $current->partial_version && $partial ) { $to_download = 'partial'; } elseif ( $current->packages->new_bundled && version_compare( $wp_version, $current->new_bundled, '<' ) && ( ! defined( 'CORE_UPGRADE_SKIP_NEW_BUNDLED' ) \|\| ! CORE_UPGRADE_SKIP_NEW_BUNDLED ) ) { $to_download = 'new_bundled'; } elseif ( $current->packages->no_content ) { $to_download = 'no_content'; } else { $to_download = 'full'; } // Lock to prevent multiple Core Updates occurring. $lock = WP_Upgrader::create_lock( 'core_updater', 15 MINUTE_IN_SECONDS ); if ( ! $lock ) { return new WP_Error( 'locked', $this->strings['locked'] ); } $download = $this->download_package( $current->packages->$to_download, false ); /* * Allow for signature soft-fail. * WARNING: This may be removed in the future. / if ( is_wp_error( $download ) && $download->get_error_data( 'softfail-filename' ) ) { // Output the failure error as a normal feedback, and not as an error: /* This filter is documented in wp-admin/includes/update-core.php / apply_filters( 'update_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 ) ) { WP_Upgrader::release_lock( 'core_updater' ); return $download; } $working_dir = $this->unpack_package( $download ); if ( is_wp_error( $working_dir ) ) { WP_Upgrader::release_lock( 'core_updater' ); return $working_dir; } // Copy update-core.php from the new version into place. if ( ! $wp_filesystem->copy( $working_dir . '/wordpress/wp-admin/includes/update-core.php', $wp_dir . 'wp-admin/includes/update-core.php', true ) ) { $wp_filesystem->delete( $working_dir, true ); WP_Upgrader::release_lock( 'core_updater' ); return new WP_Error( 'copy_failed_for_update_core_file', __( 'The update cannot be installed because some files could not be copied. This is usually due to inconsistent file permissions.' ), 'wp-admin/includes/update-core.php' ); } $wp_filesystem->chmod( $wp_dir . 'wp-admin/includes/update-core.php', FS_CHMOD_FILE ); wp_opcache_invalidate( ABSPATH . 'wp-admin/includes/update-core.php' ); require_once ABSPATH . 'wp-admin/includes/update-core.php'; if ( ! function_exists( 'update_core' ) ) { WP_Upgrader::release_lock( 'core_updater' ); return new WP_Error( 'copy_failed_space', $this->strings['copy_failed_space'] ); } $result = update_core( $working_dir, $wp_dir ); // In the event of an issue, we may be able to roll back. if ( $parsed_args['attempt_rollback'] && $current->packages->rollback && ! $parsed_args['do_rollback'] ) { $try_rollback = false; if ( is_wp_error( $result ) ) { $error_code = $result->get_error_code(); / * Not all errors are equal. These codes are critical: copy_failed__copy_dir, * mkdir_failed__copy_dir, copy_failed__copy_dir_retry, and disk_full. * do_rollback allows for update_core() to trigger a rollback if needed. / if ( str_contains( $error_code, 'do_rollback' ) ) { $try_rollback = true; } elseif ( str_contains( $error_code, '__copy_dir' ) ) { $try_rollback = true; } elseif ( 'disk_full' === $error_code ) { $try_rollback = true; } } if ( $try_rollback ) { /* This filter is documented in wp-admin/includes/update-core.php / apply_filters( 'update_feedback', $result ); /* This filter is documented in wp-admin/includes/update-core.php / apply_filters( 'update_feedback', $this->strings['start_rollback'] ); $rollback_result = $this->upgrade( $current, array_merge( $parsed_args, array( 'do_rollback' => true ) ) ); $original_result = $result; $result = new WP_Error( 'rollback_was_required', $this->strings['rollback_was_required'], (object) array( 'update' => $original_result, 'rollback' => $rollback_result, ) ); } } /* This action is documented in wp-admin/includes/class-wp-upgrader.php / do_action( 'upgrader_process_complete', $this, array( 'action' => 'update', 'type' => 'core', ) ); // Clear the current updates. delete_site_transient( 'update_core' ); if ( ! $parsed_args['do_rollback'] ) { $stats = array( 'update_type' => $current->response, 'success' => true, 'fs_method' => $wp_filesystem->method, 'fs_method_forced' => defined( 'FS_METHOD' ) \|\| has_filter( 'filesystem_method' ), 'fs_method_direct' => ! empty( $GLOBALS['_wp_filesystem_direct_method'] ) ? $GLOBALS['_wp_filesystem_direct_method'] : '', 'time_taken' => time() - $start_time, 'reported' => $wp_version, 'attempted' => $current->version, ); if ( is_wp_error( $result ) ) { $stats['success'] = false; // Did a rollback occur? if ( ! empty( $try_rollback ) ) { $stats['error_code'] = $original_result->get_error_code(); $stats['error_data'] = $original_result->get_error_data(); // Was the rollback successful? If not, collect its error too. $stats['rollback'] = ! is_wp_error( $rollback_result ); if ( is_wp_error( $rollback_result ) ) { $stats['rollback_code'] = $rollback_result->get_error_code(); $stats['rollback_data'] = $rollback_result->get_error_data(); } } else { $stats['error_code'] = $result->get_error_code(); $stats['error_data'] = $result->get_error_data(); } } wp_version_check( $stats ); } WP_Upgrader::release_lock( 'core_updater' ); return $result; } /* * Determines if this WordPress Core version should update to an offered version or not. * * @since 3.7.0 * * @param string $offered_ver The offered version, of the format x.y.z. * @return bool True if we should update to the offered version, otherwise false. / public static function should_update_to_version( $offered_ver ) { require ABSPATH . WPINC . '/version.php'; // $wp_version; // x.y.z $current_branch = implode( '.', array_slice( preg_split( '/[.-]/', $wp_version ), 0, 2 ) ); // x.y $new_branch = implode( '.', array_slice( preg_split( '/[.-]/', $offered_ver ), 0, 2 ) ); // x.y $current_is_development_version = (bool) strpos( $wp_version, '-' ); // Defaults: $upgrade_dev = get_site_option( 'auto_update_core_dev', 'enabled' ) === 'enabled'; $upgrade_minor = get_site_option( 'auto_update_core_minor', 'enabled' ) === 'enabled'; $upgrade_major = get_site_option( 'auto_update_core_major', 'unset' ) === 'enabled'; // WP_AUTO_UPDATE_CORE = true (all), 'beta', 'rc', 'development', 'branch-development', 'minor', false. if ( defined( 'WP_AUTO_UPDATE_CORE' ) ) { if ( false === WP_AUTO_UPDATE_CORE ) { // Defaults to turned off, unless a filter allows it. $upgrade_dev = false; $upgrade_minor = false; $upgrade_major = false; } elseif ( true === WP_AUTO_UPDATE_CORE \|\| in_array( WP_AUTO_UPDATE_CORE, array( 'beta', 'rc', 'development', 'branch-development' ), true ) ) { // ALL updates for core. $upgrade_dev = true; $upgrade_minor = true; $upgrade_major = true; } elseif ( 'minor' === WP_AUTO_UPDATE_CORE ) { // Only minor updates for core. $upgrade_dev = false; $upgrade_minor = true; $upgrade_major = false; } } // 1: If we're already on that version, not much point in updating? if ( $offered_ver === $wp_version ) { return false; } // 2: If we're running a newer version, that's a nope. if ( version_compare( $wp_version, $offered_ver, '>' ) ) { return false; } $failure_data = get_site_option( 'auto_core_update_failed' ); if ( $failure_data ) { // If this was a critical update failure, cannot update. if ( ! empty( $failure_data['critical'] ) ) { return false; } // Don't claim we can update on update-core.php if we have a non-critical failure logged. if ( $wp_version === $failure_data['current'] && str_contains( $offered_ver, '.1.next.minor' ) ) { return false; } / * Cannot update if we're retrying the same A to B update that caused a non-critical failure. * Some non-critical failures do allow retries, like download_failed. * 3.7.1 => 3.7.2 resulted in files_not_writable, if we are still on 3.7.1 and still trying to update to 3.7.2. / if ( empty( $failure_data['retry'] ) && $wp_version === $failure_data['current'] && $offered_ver === $failure_data['attempted'] ) { return false; } } // 3: 3.7-alpha-25000 -> 3.7-alpha-25678 -> 3.7-beta1 -> 3.7-beta2. if ( $current_is_development_version ) { /* * Filters whether to enable automatic core updates for development versions. * * @since 3.7.0 * * @param bool $upgrade_dev Whether to enable automatic updates for * development versions. / if ( ! apply_filters( 'allow_dev_auto_core_updates', $upgrade_dev ) ) { return false; } // Else fall through to minor + major branches below. } // 4: Minor in-branch updates (3.7.0 -> 3.7.1 -> 3.7.2 -> 3.7.4). if ( $current_branch === $new_branch ) { /* * Filters whether to enable minor automatic core updates. * * @since 3.7.0 * * @param bool $upgrade_minor Whether to enable minor automatic core updates. / return apply_filters( 'allow_minor_auto_core_updates', $upgrade_minor ); } // 5: Major version updates (3.7.0 -> 3.8.0 -> 3.9.1). if ( version_compare( $new_branch, $current_branch, '>' ) ) { /* * Filters whether to enable major automatic core updates. * * @since 3.7.0 * * @param bool $upgrade_major Whether to enable major automatic core updates. / return apply_filters( 'allow_major_auto_core_updates', $upgrade_major ); } // If we're not sure, we don't want it. return false; } /* * Compares the disk file checksums against the expected checksums. * * @since 3.7.0 * * @global string $wp_version The WordPress version string. * @global string $wp_local_package Locale code of the package. * * @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 ( str_starts_with( $file, 'wp-content' ) ) { continue; } if ( ! file_exists( ABSPATH . $file ) \|\| md5_file( ABSPATH . $file ) !== $checksum ) { return false; } } return true; } } Back

Edit File : class-core-upgrader.php | Size : 14.83 KB

<?php
/**
 * Upgrade API: Core_Upgrader class
 *
 * @package WordPress
 * @subpackage Upgrader
 * @since 4.6.0
 */

/**
 * Core class used for updating core.
 *
 * It allows for WordPress to upgrade itself in combination with
 * the wp-admin/includes/update-core.php file.
 *
 * Note: Newly introduced functions and methods cannot be used here.
 * All functions must be present in the previous version being upgraded from
 * as this file is used there too.
 *
 * @since 2.8.0
 * @since 4.6.0 Moved to its own file from wp-admin/includes/class-wp-upgrader.php.
 *
 * @see WP_Upgrader
 */
class Core_Upgrader extends WP_Upgrader {

/**
	 * Initializes the upgrade strings.
	 *
	 * @since 2.8.0
	 */
	public function upgrade_strings() {
		$this->strings['up_to_date'] = __( 'WordPress is at the latest version.' );
		$this->strings['locked']     = __( 'Another update is currently in progress.' );
		$this->strings['no_package'] = __( 'Update package not available.' );
		/* translators: %s: Package URL. */
		$this->strings['downloading_package']   = sprintf( __( 'Downloading update from %s&#8230;' ), '<span class="code pre">%s</span>' );
		$this->strings['unpack_package']        = __( 'Unpacking the update&#8230;' );
		$this->strings['copy_failed']           = __( 'Could not copy files.' );
		$this->strings['copy_failed_space']     = __( 'Could not copy files. You may have run out of disk space.' );
		$this->strings['start_rollback']        = __( 'Attempting to restore the previous version.' );
		$this->strings['rollback_was_required'] = __( 'Due to an error during updating, WordPress has been restored to your previous version.' );
	}

/**
	 * Upgrades WordPress core.
	 *
	 * @since 2.8.0
	 *
	 * @global WP_Filesystem_Base $wp_filesystem                WordPress filesystem subclass.
	 * @global callable           $_wp_filesystem_direct_method
	 *
	 * @param object $current Response object for whether WordPress is current.
	 * @param array  $args {
	 *     Optional. Arguments for upgrading WordPress core. Default empty array.
	 *
	 *     @type bool $pre_check_md5    Whether to check the file checksums before
	 *                                  attempting the upgrade. Default true.
	 *     @type bool $attempt_rollback Whether to attempt to rollback the chances if
	 *                                  there is a problem. Default false.
	 *     @type bool $do_rollback      Whether to perform this "upgrade" as a rollback.
	 *                                  Default false.
	 * }
	 * @return string|false|WP_Error New WordPress version on success, false or WP_Error on failure.
	 */
	public function upgrade( $current, $args = array() ) {
		global $wp_filesystem;

require ABSPATH . WPINC . '/version.php'; // $wp_version;

$start_time = time();

$defaults    = array(
			'pre_check_md5'                => true,
			'attempt_rollback'             => false,
			'do_rollback'                  => false,
			'allow_relaxed_file_ownership' => false,
		);
		$parsed_args = wp_parse_args( $args, $defaults );

$this->init();
		$this->upgrade_strings();

// Is an update available?
		if ( ! isset( $current->response ) || 'latest' === $current->response ) {
			return new WP_Error( 'up_to_date', $this->strings['up_to_date'] );
		}

$res = $this->fs_connect( array( ABSPATH, WP_CONTENT_DIR ), $parsed_args['allow_relaxed_file_ownership'] );
		if ( ! $res || is_wp_error( $res ) ) {
			return $res;
		}

$wp_dir = trailingslashit( $wp_filesystem->abspath() );

$partial = true;
		if ( $parsed_args['do_rollback'] ) {
			$partial = false;
		} elseif ( $parsed_args['pre_check_md5'] && ! $this->check_files() ) {
			$partial = false;
		}

/*
		 * If partial update is returned from the API, use that, unless we're doing
		 * a reinstallation. If we cross the new_bundled version number, then use
		 * the new_bundled zip. Don't though if the constant is set to skip bundled items.
		 * If the API returns a no_content zip, go with it. Finally, default to the full zip.
		 */
		if ( $parsed_args['do_rollback'] && $current->packages->rollback ) {
			$to_download = 'rollback';
		} elseif ( $current->packages->partial && 'reinstall' !== $current->response && $wp_version === $current->partial_version && $partial ) {
			$to_download = 'partial';
		} elseif ( $current->packages->new_bundled && version_compare( $wp_version, $current->new_bundled, '<' )
			&& ( ! defined( 'CORE_UPGRADE_SKIP_NEW_BUNDLED' ) || ! CORE_UPGRADE_SKIP_NEW_BUNDLED ) ) {
			$to_download = 'new_bundled';
		} elseif ( $current->packages->no_content ) {
			$to_download = 'no_content';
		} else {
			$to_download = 'full';
		}

// Lock to prevent multiple Core Updates occurring.
		$lock = WP_Upgrader::create_lock( 'core_updater', 15 * MINUTE_IN_SECONDS );
		if ( ! $lock ) {
			return new WP_Error( 'locked', $this->strings['locked'] );
		}

$download = $this->download_package( $current->packages->$to_download, false );

/*
		 * Allow for signature soft-fail.
		 * WARNING: This may be removed in the future.
		 */
		if ( is_wp_error( $download ) && $download->get_error_data( 'softfail-filename' ) ) {
			// Output the failure error as a normal feedback, and not as an error:
			/** This filter is documented in wp-admin/includes/update-core.php */
			apply_filters( 'update_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 ) ) {
			WP_Upgrader::release_lock( 'core_updater' );
			return $download;
		}

$working_dir = $this->unpack_package( $download );
		if ( is_wp_error( $working_dir ) ) {
			WP_Upgrader::release_lock( 'core_updater' );
			return $working_dir;
		}

// Copy update-core.php from the new version into place.
		if ( ! $wp_filesystem->copy( $working_dir . '/wordpress/wp-admin/includes/update-core.php', $wp_dir . 'wp-admin/includes/update-core.php', true ) ) {
			$wp_filesystem->delete( $working_dir, true );
			WP_Upgrader::release_lock( 'core_updater' );
			return new WP_Error( 'copy_failed_for_update_core_file', __( 'The update cannot be installed because some files could not be copied. This is usually due to inconsistent file permissions.' ), 'wp-admin/includes/update-core.php' );
		}
		$wp_filesystem->chmod( $wp_dir . 'wp-admin/includes/update-core.php', FS_CHMOD_FILE );

wp_opcache_invalidate( ABSPATH . 'wp-admin/includes/update-core.php' );
		require_once ABSPATH . 'wp-admin/includes/update-core.php';

if ( ! function_exists( 'update_core' ) ) {
			WP_Upgrader::release_lock( 'core_updater' );
			return new WP_Error( 'copy_failed_space', $this->strings['copy_failed_space'] );
		}

$result = update_core( $working_dir, $wp_dir );

// In the event of an issue, we may be able to roll back.
		if ( $parsed_args['attempt_rollback'] && $current->packages->rollback && ! $parsed_args['do_rollback'] ) {
			$try_rollback = false;
			if ( is_wp_error( $result ) ) {
				$error_code = $result->get_error_code();
				/*
				 * Not all errors are equal. These codes are critical: copy_failed__copy_dir,
				 * mkdir_failed__copy_dir, copy_failed__copy_dir_retry, and disk_full.
				 * do_rollback allows for update_core() to trigger a rollback if needed.
				 */
				if ( str_contains( $error_code, 'do_rollback' ) ) {
					$try_rollback = true;
				} elseif ( str_contains( $error_code, '__copy_dir' ) ) {
					$try_rollback = true;
				} elseif ( 'disk_full' === $error_code ) {
					$try_rollback = true;
				}
			}

if ( $try_rollback ) {
				/** This filter is documented in wp-admin/includes/update-core.php */
				apply_filters( 'update_feedback', $result );

/** This filter is documented in wp-admin/includes/update-core.php */
				apply_filters( 'update_feedback', $this->strings['start_rollback'] );

$rollback_result = $this->upgrade( $current, array_merge( $parsed_args, array( 'do_rollback' => true ) ) );

$original_result = $result;
				$result          = new WP_Error(
					'rollback_was_required',
					$this->strings['rollback_was_required'],
					(object) array(
						'update'   => $original_result,
						'rollback' => $rollback_result,
					)
				);
			}
		}

/** This action is documented in wp-admin/includes/class-wp-upgrader.php */
		do_action(
			'upgrader_process_complete',
			$this,
			array(
				'action' => 'update',
				'type'   => 'core',
			)
		);

// Clear the current updates.
		delete_site_transient( 'update_core' );

if ( ! $parsed_args['do_rollback'] ) {
			$stats = array(
				'update_type'      => $current->response,
				'success'          => true,
				'fs_method'        => $wp_filesystem->method,
				'fs_method_forced' => defined( 'FS_METHOD' ) || has_filter( 'filesystem_method' ),
				'fs_method_direct' => ! empty( $GLOBALS['_wp_filesystem_direct_method'] ) ? $GLOBALS['_wp_filesystem_direct_method'] : '',
				'time_taken'       => time() - $start_time,
				'reported'         => $wp_version,
				'attempted'        => $current->version,
			);

if ( is_wp_error( $result ) ) {
				$stats['success'] = false;
				// Did a rollback occur?
				if ( ! empty( $try_rollback ) ) {
					$stats['error_code'] = $original_result->get_error_code();
					$stats['error_data'] = $original_result->get_error_data();
					// Was the rollback successful? If not, collect its error too.
					$stats['rollback'] = ! is_wp_error( $rollback_result );
					if ( is_wp_error( $rollback_result ) ) {
						$stats['rollback_code'] = $rollback_result->get_error_code();
						$stats['rollback_data'] = $rollback_result->get_error_data();
					}
				} else {
					$stats['error_code'] = $result->get_error_code();
					$stats['error_data'] = $result->get_error_data();
				}
			}

wp_version_check( $stats );
		}

WP_Upgrader::release_lock( 'core_updater' );

return $result;
	}

/**
	 * Determines if this WordPress Core version should update to an offered version or not.
	 *
	 * @since 3.7.0
	 *
	 * @param string $offered_ver The offered version, of the format x.y.z.
	 * @return bool True if we should update to the offered version, otherwise false.
	 */
	public static function should_update_to_version( $offered_ver ) {
		require ABSPATH . WPINC . '/version.php'; // $wp_version; // x.y.z

$current_branch = implode( '.', array_slice( preg_split( '/[.-]/', $wp_version ), 0, 2 ) ); // x.y
		$new_branch     = implode( '.', array_slice( preg_split( '/[.-]/', $offered_ver ), 0, 2 ) ); // x.y

$current_is_development_version = (bool) strpos( $wp_version, '-' );

// Defaults:
		$upgrade_dev   = get_site_option( 'auto_update_core_dev', 'enabled' ) === 'enabled';
		$upgrade_minor = get_site_option( 'auto_update_core_minor', 'enabled' ) === 'enabled';
		$upgrade_major = get_site_option( 'auto_update_core_major', 'unset' ) === 'enabled';

// WP_AUTO_UPDATE_CORE = true (all), 'beta', 'rc', 'development', 'branch-development', 'minor', false.
		if ( defined( 'WP_AUTO_UPDATE_CORE' ) ) {
			if ( false === WP_AUTO_UPDATE_CORE ) {
				// Defaults to turned off, unless a filter allows it.
				$upgrade_dev   = false;
				$upgrade_minor = false;
				$upgrade_major = false;
			} elseif ( true === WP_AUTO_UPDATE_CORE
				|| in_array( WP_AUTO_UPDATE_CORE, array( 'beta', 'rc', 'development', 'branch-development' ), true )
			) {
				// ALL updates for core.
				$upgrade_dev   = true;
				$upgrade_minor = true;
				$upgrade_major = true;
			} elseif ( 'minor' === WP_AUTO_UPDATE_CORE ) {
				// Only minor updates for core.
				$upgrade_dev   = false;
				$upgrade_minor = true;
				$upgrade_major = false;
			}
		}

// 1: If we're already on that version, not much point in updating?
		if ( $offered_ver === $wp_version ) {
			return false;
		}

// 2: If we're running a newer version, that's a nope.
		if ( version_compare( $wp_version, $offered_ver, '>' ) ) {
			return false;
		}

$failure_data = get_site_option( 'auto_core_update_failed' );
		if ( $failure_data ) {
			// If this was a critical update failure, cannot update.
			if ( ! empty( $failure_data['critical'] ) ) {
				return false;
			}

// Don't claim we can update on update-core.php if we have a non-critical failure logged.
			if ( $wp_version === $failure_data['current'] && str_contains( $offered_ver, '.1.next.minor' ) ) {
				return false;
			}

/*
			 * Cannot update if we're retrying the same A to B update that caused a non-critical failure.
			 * Some non-critical failures do allow retries, like download_failed.
			 * 3.7.1 => 3.7.2 resulted in files_not_writable, if we are still on 3.7.1 and still trying to update to 3.7.2.
			 */
			if ( empty( $failure_data['retry'] ) && $wp_version === $failure_data['current'] && $offered_ver === $failure_data['attempted'] ) {
				return false;
			}
		}

// 3: 3.7-alpha-25000 -> 3.7-alpha-25678 -> 3.7-beta1 -> 3.7-beta2.
		if ( $current_is_development_version ) {

/**
			 * Filters whether to enable automatic core updates for development versions.
			 *
			 * @since 3.7.0
			 *
			 * @param bool $upgrade_dev Whether to enable automatic updates for
			 *                          development versions.
			 */
			if ( ! apply_filters( 'allow_dev_auto_core_updates', $upgrade_dev ) ) {
				return false;
			}
			// Else fall through to minor + major branches below.
		}

// 4: Minor in-branch updates (3.7.0 -> 3.7.1 -> 3.7.2 -> 3.7.4).
		if ( $current_branch === $new_branch ) {

/**
			 * Filters whether to enable minor automatic core updates.
			 *
			 * @since 3.7.0
			 *
			 * @param bool $upgrade_minor Whether to enable minor automatic core updates.
			 */
			return apply_filters( 'allow_minor_auto_core_updates', $upgrade_minor );
		}

// 5: Major version updates (3.7.0 -> 3.8.0 -> 3.9.1).
		if ( version_compare( $new_branch, $current_branch, '>' ) ) {

/**
			 * Filters whether to enable major automatic core updates.
			 *
			 * @since 3.7.0
			 *
			 * @param bool $upgrade_major Whether to enable major automatic core updates.
			 */
			return apply_filters( 'allow_major_auto_core_updates', $upgrade_major );
		}

// If we're not sure, we don't want it.
		return false;
	}

/**
	 * Compares the disk file checksums against the expected checksums.
	 *
	 * @since 3.7.0
	 *
	 * @global string $wp_version       The WordPress version string.
	 * @global string $wp_local_package Locale code of the package.
	 *
	 * @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 ( str_starts_with( $file, 'wp-content' ) ) {
				continue;
			}
			if ( ! file_exists( ABSPATH . $file ) || md5_file( ABSPATH . $file ) !== $checksum ) {
				return false;
			}
		}

return true;
	}
}

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