diff -r 34716fd837a4 -r be944660c56a wp/wp-admin/includes/upgrade.php
--- a/wp/wp-admin/includes/upgrade.php	Tue Dec 15 15:52:01 2020 +0100
+++ b/wp/wp-admin/includes/upgrade.php	Wed Sep 21 18:19:35 2022 +0200
@@ -88,7 +88,7 @@
 			$user_password = wp_generate_password( 12, false );
 			$message       = __( '<strong><em>Note that password</em></strong> carefully! It is a <em>random</em> password that was generated just for you.' );
 			$user_id       = wp_create_user( $user_name, $user_password, $user_email );
-			update_user_option( $user_id, 'default_password_nag', true, true );
+			update_user_meta( $user_id, 'default_password_nag', true );
 			$email_password = true;
 			$user_created   = true;
 		} elseif ( ! $user_id ) {
@@ -403,59 +403,13 @@
 
 		// Set up default widgets for default theme.
 		update_option(
-			'widget_search',
-			array(
-				2              => array( 'title' => '' ),
-				'_multiwidget' => 1,
-			)
-		);
-		update_option(
-			'widget_recent-posts',
-			array(
-				2              => array(
-					'title'  => '',
-					'number' => 5,
-				),
-				'_multiwidget' => 1,
-			)
-		);
-		update_option(
-			'widget_recent-comments',
+			'widget_block',
 			array(
-				2              => array(
-					'title'  => '',
-					'number' => 5,
-				),
-				'_multiwidget' => 1,
-			)
-		);
-		update_option(
-			'widget_archives',
-			array(
-				2              => array(
-					'title'    => '',
-					'count'    => 0,
-					'dropdown' => 0,
-				),
-				'_multiwidget' => 1,
-			)
-		);
-		update_option(
-			'widget_categories',
-			array(
-				2              => array(
-					'title'        => '',
-					'count'        => 0,
-					'hierarchical' => 0,
-					'dropdown'     => 0,
-				),
-				'_multiwidget' => 1,
-			)
-		);
-		update_option(
-			'widget_meta',
-			array(
-				2              => array( 'title' => '' ),
+				2              => array( 'content' => '<!-- wp:search /-->' ),
+				3              => array( 'content' => '<!-- wp:group --><div class="wp-block-group"><!-- wp:heading --><h2>' . __( 'Recent Posts' ) . '</h2><!-- /wp:heading --><!-- wp:latest-posts /--></div><!-- /wp:group -->' ),
+				4              => array( 'content' => '<!-- wp:group --><div class="wp-block-group"><!-- wp:heading --><h2>' . __( 'Recent Comments' ) . '</h2><!-- /wp:heading --><!-- wp:latest-comments {"displayAvatar":false,"displayDate":false,"displayExcerpt":false} /--></div><!-- /wp:group -->' ),
+				5              => array( 'content' => '<!-- wp:group --><div class="wp-block-group"><!-- wp:heading --><h2>' . __( 'Archives' ) . '</h2><!-- /wp:heading --><!-- wp:archives /--></div><!-- /wp:group -->' ),
+				6              => array( 'content' => '<!-- wp:group --><div class="wp-block-group"><!-- wp:heading --><h2>' . __( 'Categories' ) . '</h2><!-- /wp:heading --><!-- wp:categories /--></div><!-- /wp:group -->' ),
 				'_multiwidget' => 1,
 			)
 		);
@@ -464,18 +418,18 @@
 			array(
 				'wp_inactive_widgets' => array(),
 				'sidebar-1'           => array(
-					0 => 'search-2',
-					1 => 'recent-posts-2',
-					2 => 'recent-comments-2',
+					0 => 'block-2',
+					1 => 'block-3',
+					2 => 'block-4',
 				),
 				'sidebar-2'           => array(
-					0 => 'archives-2',
-					1 => 'categories-2',
-					2 => 'meta-2',
+					0 => 'block-5',
+					1 => 'block-6',
 				),
 				'array_version'       => 3,
 			)
 		);
+
 		if ( ! is_multisite() ) {
 			update_user_meta( $user_id, 'show_welcome_panel', 1 );
 		} elseif ( ! is_super_admin( $user_id ) && ! metadata_exists( 'user', $user_id, 'show_welcome_panel' ) ) {
@@ -586,17 +540,18 @@
 
 if ( ! function_exists( 'wp_new_blog_notification' ) ) :
 	/**
-	 * Notifies the site admin that the setup is complete.
+	 * Notifies the site admin that the installation of WordPress is complete.
 	 *
-	 * Sends an email with wp_mail to the new administrator that the site setup is complete,
+	 * Sends an email to the new administrator that the installation is complete
 	 * and provides them with a record of their login credentials.
 	 *
 	 * @since 2.1.0
 	 *
 	 * @param string $blog_title Site title.
-	 * @param string $blog_url   Site url.
-	 * @param int    $user_id    User ID.
-	 * @param string $password   User's Password.
+	 * @param string $blog_url   Site URL.
+	 * @param int    $user_id    Administrator's user ID.
+	 * @param string $password   Administrator's password. Note that a placeholder message is
+	 *                           usually passed instead of the actual password.
 	 */
 	function wp_new_blog_notification( $blog_title, $blog_url, $user_id, $password ) {
 		$user      = new WP_User( $user_id );
@@ -629,7 +584,40 @@
 			$login_url
 		);
 
-		wp_mail( $email, __( 'New WordPress Site' ), $message );
+		$installed_email = array(
+			'to'      => $email,
+			'subject' => __( 'New WordPress Site' ),
+			'message' => $message,
+			'headers' => '',
+		);
+
+		/**
+		 * Filters the contents of the email sent to the site administrator when WordPress is installed.
+		 *
+		 * @since 5.6.0
+		 *
+		 * @param array $installed_email {
+		 *     Used to build wp_mail().
+		 *
+		 *     @type string $to      The email address of the recipient.
+		 *     @type string $subject The subject of the email.
+		 *     @type string $message The content of the email.
+		 *     @type string $headers Headers.
+		 * }
+		 * @param WP_User $user          The site administrator user object.
+		 * @param string  $blog_title    The site title.
+		 * @param string  $blog_url      The site URL.
+		 * @param string  $password      The site administrator's password. Note that a placeholder message
+		 *                               is usually passed instead of the user's actual password.
+		 */
+		$installed_email = apply_filters( 'wp_installed_email', $installed_email, $user, $blog_title, $blog_url, $password );
+
+		wp_mail(
+			$installed_email['to'],
+			$installed_email['subject'],
+			$installed_email['message'],
+			$installed_email['headers']
+		);
 	}
 endif;
 
@@ -840,6 +828,10 @@
 		upgrade_550();
 	}
 
+	if ( $wp_current_db_version < 49752 ) {
+		upgrade_560();
+	}
+
 	maybe_disable_link_manager();
 
 	maybe_disable_automattic_widgets();
@@ -988,8 +980,8 @@
 	if ( ! $got_gmt_fields ) {
 
 		// Add or subtract time to all dates, to get GMT dates.
-		$add_hours   = intval( $diff_gmt_weblogger );
-		$add_minutes = intval( 60 * ( $diff_gmt_weblogger - $add_hours ) );
+		$add_hours   = (int) $diff_gmt_weblogger;
+		$add_minutes = (int) ( 60 * ( $diff_gmt_weblogger - $add_hours ) );
 		$wpdb->query( "UPDATE $wpdb->posts SET post_date_gmt = DATE_ADD(post_date, INTERVAL '$add_hours:$add_minutes' HOUR_MINUTE)" );
 		$wpdb->query( "UPDATE $wpdb->posts SET post_modified = post_date" );
 		$wpdb->query( "UPDATE $wpdb->posts SET post_modified_gmt = DATE_ADD(post_modified, INTERVAL '$add_hours:$add_minutes' HOUR_MINUTE) WHERE post_modified != '0000-00-00 00:00:00'" );
@@ -1078,7 +1070,7 @@
 			$limit    = $option->dupes - 1;
 			$dupe_ids = $wpdb->get_col( $wpdb->prepare( "SELECT option_id FROM $wpdb->options WHERE option_name = %s LIMIT %d", $option->option_name, $limit ) );
 			if ( $dupe_ids ) {
-				$dupe_ids = join( ',', $dupe_ids );
+				$dupe_ids = implode( ',', $dupe_ids );
 				$wpdb->query( "DELETE FROM $wpdb->options WHERE option_id IN ($dupe_ids)" );
 			}
 		}
@@ -2014,7 +2006,7 @@
 		return;
 	}
 
-	$allowed_length = intval( $content_length['length'] ) - 10;
+	$allowed_length = (int) $content_length['length'] - 10;
 
 	$comments = $wpdb->get_results(
 		"SELECT `comment_ID` FROM `{$wpdb->comments}`
@@ -2203,6 +2195,60 @@
 }
 
 /**
+ * Executes changes made in WordPress 5.6.0.
+ *
+ * @ignore
+ * @since 5.6.0
+ */
+function upgrade_560() {
+	global $wp_current_db_version, $wpdb;
+
+	if ( $wp_current_db_version < 49572 ) {
+		/*
+		 * Clean up the `post_category` column removed from schema in version 2.8.0.
+		 * Its presence may conflict with `WP_Post::__get()`.
+		 */
+		$post_category_exists = $wpdb->get_var( "SHOW COLUMNS FROM $wpdb->posts LIKE 'post_category'" );
+		if ( ! is_null( $post_category_exists ) ) {
+			$wpdb->query( "ALTER TABLE $wpdb->posts DROP COLUMN `post_category`" );
+		}
+
+		/*
+		 * When upgrading from WP < 5.6.0 set the core major auto-updates option to `unset` by default.
+		 * This overrides the same option from populate_options() that is intended for new installs.
+		 * See https://core.trac.wordpress.org/ticket/51742.
+		 */
+		update_option( 'auto_update_core_major', 'unset' );
+	}
+
+	if ( $wp_current_db_version < 49632 ) {
+		/*
+		 * Regenerate the .htaccess file to add the `HTTP_AUTHORIZATION` rewrite rule.
+		 * See https://core.trac.wordpress.org/ticket/51723.
+		 */
+		save_mod_rewrite_rules();
+	}
+
+	if ( $wp_current_db_version < 49735 ) {
+		delete_transient( 'dirsize_cache' );
+	}
+
+	if ( $wp_current_db_version < 49752 ) {
+		$results = $wpdb->get_results(
+			$wpdb->prepare(
+				"SELECT 1 FROM {$wpdb->usermeta} WHERE meta_key = %s LIMIT 1",
+				WP_Application_Passwords::USERMETA_KEY_APPLICATION_PASSWORDS
+			)
+		);
+
+		if ( ! empty( $results ) ) {
+			$network_id = get_main_network_id();
+			update_network_option( $network_id, WP_Application_Passwords::OPTION_KEY_IN_USE, 1 );
+		}
+	}
+}
+
+/**
  * Executes network-level upgrade routines.
  *
  * @since 3.0.0
@@ -3456,6 +3502,8 @@
 	/**
 	 * Filters if upgrade routines should be run on global tables.
 	 *
+	 * @since 4.3.0
+	 *
 	 * @param bool $should_upgrade Whether to run the upgrade routines on global tables.
 	 */
 	return apply_filters( 'wp_should_upgrade_global_tables', $should_upgrade );