Sukhendu2002 · Oct 16, 2026
diff --git a/src/wp-admin/includes/class-wp-ms-sites-list-table.php b/src/wp-admin/includes/class-wp-ms-sites-list-table.php
@@ -132,10 +132,11 @@ public function prepare_items() {
 		} elseif ( is_numeric( $s ) && empty( $wild ) ) {
 			$args['ID'] = $s;
 		} else {
-			$args['search'] = $s;
+			$args['search']         = $s;
+			$args['search_columns'] = array( 'domain', 'path', 'blogname' );
 
 			if ( ! is_subdomain_install() ) {
-				$args['search_columns'] = array( 'path' );
+				$args['search_columns'] = array( 'path', 'blogname' );
 			}
 		}
 

diff --git a/src/wp-admin/includes/schema.php b/src/wp-admin/includes/schema.php
@@ -1122,6 +1122,21 @@ function populate_network( $network_id = 1, $domain = '', $email = '', $site_nam
 		);
 		$current_site->blog_id = $wpdb->insert_id;
 
+		// Multisite functions are not loaded yet when converting a single site.
+		$site_title = $wpdb->get_row(
+			$wpdb->prepare( "SELECT option_value FROM $wpdb->options WHERE option_name = %s", 'blogname' )
+		);
+		if ( $site_title ) {
+			$wpdb->insert(
+				$wpdb->blogmeta,
+				array(
+					'blog_id'    => $current_site->blog_id,
+					'meta_key'   => 'blogname',
+					'meta_value' => WP_HTML_Decoder::decode_text_node( $site_title->option_value ),
+				)
+			);
+		}
+
 		$site_user_id = (int) $wpdb->get_var(
 			$wpdb->prepare(
 				"SELECT meta_value

diff --git a/src/wp-admin/network/upgrade.php b/src/wp-admin/network/upgrade.php
@@ -59,9 +59,6 @@
 
 		$site_ids = get_sites(
 			array(
-				'spam'                   => 0,
-				'deleted'                => 0,
-				'archived'               => 0,
 				'network_id'             => get_current_network_id(),
 				'number'                 => 5,
 				'offset'                 => $n,
@@ -77,6 +74,17 @@
 		}
 		echo '<ul>';
 		foreach ( (array) $site_ids as $site_id ) {
+			$site = get_site( $site_id );
+			if ( ! $site ) {
+				continue;
+			}
+
+			if ( $site->spam || $site->deleted || $site->archived ) {
+				// Refresh searchable titles without loading an inactive site's administration.
+				_wp_update_site_title( $site_id );
+				continue;
+			}
+
 			switch_to_blog( $site_id );
 			$siteurl     = site_url();
 			$upgrade_url = admin_url( 'upgrade.php?step=upgrade_db' );

diff --git a/src/wp-includes/class-wp-site-query.php b/src/wp-includes/class-wp-site-query.php
@@ -112,6 +112,7 @@ class WP_Site_Query {
 	 * @since 5.1.0 Introduced the 'update_site_meta_cache', 'meta_query', 'meta_key',
 	 *              'meta_compare_key', 'meta_value', 'meta_type', and 'meta_compare' parameters.
 	 * @since 5.3.0 Introduced the 'meta_type_key' parameter.
+	 * @since 7.2.0 Added support for 'blogname' in 'search_columns'.
 	 *
 	 * @param string|array $query {
 	 *     Optional. Array or query string of site query parameters. Default empty.
@@ -167,8 +168,9 @@ class WP_Site_Query {
 	 *     @type string[]        $lang__in               Array of language IDs to include affiliated sites for. Default empty.
 	 *     @type string[]        $lang__not_in           Array of language IDs to exclude affiliated sites for. Default empty.
 	 *     @type string          $search                 Search term(s) to retrieve matching sites for. Default empty.
-	 *     @type string[]        $search_columns         Array of column names to be searched. Accepts 'domain' and 'path'.
-	 *                                                   Default empty array.
+	 *     @type string[]        $search_columns         Array of names to be searched. Accepts 'domain', 'path', and
+	 *                                                   'blogname' (the site title stored in site metadata).
+	 *                                                   Default empty array, which searches 'domain' and 'path'.
 	 *     @type bool            $update_site_cache      Whether to prime the cache for found sites. Default true.
 	 *     @type bool            $update_site_meta_cache Whether to prime the metadata cache for found sites. Default true.
 	 *     @type string|string[] $meta_key               Meta key or keys to filter by.
@@ -612,7 +614,7 @@ protected function get_site_ids() {
 			$search_columns = array();
 
 			if ( $this->query_vars['search_columns'] ) {
-				$search_columns = array_intersect( $this->query_vars['search_columns'], array( 'domain', 'path' ) );
+				$search_columns = array_intersect( $this->query_vars['search_columns'], array( 'domain', 'path', 'blogname' ) );
 			}
 
 			if ( ! $search_columns ) {
@@ -622,7 +624,8 @@ protected function get_site_ids() {
 			/**
 			 * Filters the columns to search in a WP_Site_Query search.
 			 *
-			 * The default columns include 'domain' and 'path.
+			 * The default columns include 'domain' and 'path'. The 'blogname' column
+			 * searches the site title stored in site metadata.
 			 *
 			 * @since 4.6.0
 			 *
@@ -776,10 +779,21 @@ protected function get_search_sql( $search, $columns ) {
 
 		$searches = array();
 		foreach ( $columns as $column ) {
+			if ( 'blogname' === $column ) {
+				if ( is_site_meta_supported() ) {
+					$searches[] = $wpdb->prepare(
+						"EXISTS ( SELECT 1 FROM {$wpdb->blogmeta} AS site_title WHERE site_title.blog_id = {$wpdb->blogs}.blog_id AND site_title.meta_key = %s AND site_title.meta_value LIKE %s )",
+						'blogname',
+						$like
+					);
+				}
+				continue;
+			}
+
 			$searches[] = $wpdb->prepare( "$column LIKE %s", $like );
 		}
 
-		return '(' . implode( ' OR ', $searches ) . ')';
+		return $searches ? '(' . implode( ' OR ', $searches ) . ')' : '0 = 1';
 	}
 
 	/**

diff --git a/src/wp-includes/ms-default-filters.php b/src/wp-includes/ms-default-filters.php
@@ -54,6 +54,13 @@
 add_action( 'wp_uninitialize_site', 'wp_uninitialize_site', 10, 1 );
 add_action( 'update_blog_public', 'wp_update_blog_public_option_on_site_update', 1, 2 );
 
+// Keep searchable site titles synchronized and populate existing sites during upgrades.
+add_action( 'add_option_blogname', '_wp_update_site_title', 10, 0 );
+add_action( 'update_option_blogname', '_wp_update_site_title', 10, 0 );
+add_action( 'delete_option_blogname', '_wp_update_site_title', 10, 0 );
+add_action( 'wp_upgrade', '_wp_update_site_title', 10, 0 );
+add_action( 'wpmu_upgrade_site', '_wp_update_site_title' );
+
 // Site meta.
 add_action( 'added_blog_meta', 'wp_cache_set_sites_last_changed' );
 add_action( 'updated_blog_meta', 'wp_cache_set_sites_last_changed' );

diff --git a/src/wp-includes/ms-site.php b/src/wp-includes/ms-site.php
@@ -751,6 +751,7 @@
 
 	// Populate metadata for the site.
 	populate_site_meta( $site->id, $args['meta'] );
+	_wp_update_site_title( $site->id );
 
 	// Remove all permissions that may exist for the site.
 	$table_prefix = $wpdb->get_blog_prefix();
@@ -890,6 +891,10 @@
 	}
 
 	// phpcs:enable WordPress.PHP.NoSilencedErrors.Discouraged
+	if ( is_site_meta_supported() ) {
+		delete_site_meta( $site->id, 'blogname' );
+	}
+
 	if ( $switch ) {
 		restore_current_blog();
 	}
@@ -1357,6 +1362,76 @@
 	update_blog_option( $site_id, 'blog_public', $is_public );
 }
 
+/**
+ * Synchronizes a site's searchable title with its saved blogname option.
+ *
+ * Decodes HTML character references to UTF-8 so that searches match the displayed
+ * title. Retries when the saved option changes during a metadata write.
+ *
+ * @since 7.2.0
+ * @access private
+ *
+ * @global wpdb $wpdb WordPress database abstraction object.
+ *
+ * @param int $site_id Optional. Site ID. Default is the current site ID.
+ * @return int|bool Meta ID if added, true if updated or deleted, false on failure or no change.
+ */
+function _wp_update_site_title( $site_id = 0 ) {
+	global $wpdb;
+	static $syncing = array();
+
+	if ( ! is_site_meta_supported() ) {
+		return false;
+	}
+
+	$site_id = (int) $site_id;
+	if ( ! $site_id ) {
+		$site_id = get_current_blog_id();
+	}
+
+	if ( isset( $syncing[ $site_id ] ) || ! get_site( $site_id ) || ! wp_is_site_initialized( $site_id ) ) {
+		return false;
+	}
+
+	$query = $wpdb->prepare(
+		'SELECT option_value FROM %i WHERE option_name = %s',
+		$wpdb->get_blog_prefix( $site_id ) . 'options',
+		'blogname'
+	);
+
+	$syncing[ $site_id ] = true;
+
+	try {
+		// Index the saved value rather than a title modified by option filters.
+		$option = $wpdb->get_row( $query ); // phpcs:ignore WordPress.DB.PreparedSQL.NotPrepared -- Prepared above.
+		if ( $wpdb->last_error ) {
+			return false;
+		}
+
+		do {
+			$value = $option ? $option->option_value : null;
+
+			if ( null === $value ) {
+				$result = delete_site_meta( $site_id, 'blogname' );
+			} else {
+				$title  = WP_HTML_Decoder::decode_text_node( $value );
+				$result = update_site_meta( $site_id, 'blogname', wp_slash( $title ) );
+			}
+
+			// An overlapping request or a metadata hook may have changed the option.
+			$option = $wpdb->get_row( $query ); // phpcs:ignore WordPress.DB.PreparedSQL.NotPrepared -- Prepared above.
+			if ( $wpdb->last_error ) {
+				return false;
+			}
+			$current_value = $option ? $option->option_value : null;
+		} while ( $value !== $current_value );
+
+		return $result;
+	} finally {
+		unset( $syncing[ $site_id ] );
+	}
+}
+
 /**
  * Sets the last changed time for the 'sites' cache group.
  *

diff --git a/tests/phpunit/tests/multisite/siteDetails.php b/tests/phpunit/tests/multisite/siteDetails.php
@@ -89,8 +89,9 @@ public function test_update_allowed_option_does_not_delete_short_blog_details_ca
 	 * @dataProvider data_allowed_options
 	 *
 	 * @ticket 40063
+	 * @ticket 58795
 	 */
-	public function test_update_allowed_option_does_not_update_sites_last_changed( $allowed_option, $temporary_value ) {
+	public function test_update_allowed_option_updates_sites_last_changed_only_for_site_title( $allowed_option, $temporary_value ) {
 		$last_changed = wp_cache_get_last_changed( 'sites' );
 
 		$original_value = get_option( $allowed_option );
@@ -101,7 +102,11 @@ public function test_update_allowed_option_does_not_update_sites_last_changed( $
 		/* Reset to original value. */
 		update_option( $allowed_option, $original_value );
 
-		$this->assertSame( $new_last_changed, $last_changed );
+		if ( 'blogname' === $allowed_option ) {
+			$this->assertNotSame( $new_last_changed, $last_changed );
+		} else {
+			$this->assertSame( $new_last_changed, $last_changed );
+		}
 	}
 
 	public function data_allowed_options() {

diff --git a/tests/phpunit/tests/multisite/siteMeta.php b/tests/phpunit/tests/multisite/siteMeta.php
@@ -117,8 +117,9 @@ public function test_get_with_no_key_should_fetch_all_keys() {
 
 		$found    = get_site_meta( self::$site_id );
 		$expected = array(
-			'foo'  => array( 'bar' ),
-			'foo1' => array( 'baz' ),
+			'blogname' => array( get_blog_option( self::$site_id, 'blogname' ) ),
+			'foo'      => array( 'bar' ),
+			'foo1'     => array( 'baz' ),
 		);
 
 		$this->assertSameSets( $expected, $found );
@@ -473,4 +474,64 @@ public function test_delete_site_meta_should_bust_get_sites_cache() {
 
 		$this->assertSameSets( array( self::$site_id ), $found );
 	}
+
+	/**
+	 * @ticket 58795
+	 */
+	public function test_title_option_addition_and_deletion_update_metadata() {
+		$site_id = self::$site_id;
+
+		$this->assertTrue( delete_blog_option( $site_id, 'blogname' ) );
+		$this->assertFalse( metadata_exists( 'blog', $site_id, 'blogname' ) );
+		$this->assertTrue( add_blog_option( $site_id, 'blogname', 'Added Catalog 58795' ) );
+		$this->assertSame( 'Added Catalog 58795', get_site_meta( $site_id, 'blogname', true ) );
+	}
+
+	/**
+	 * @ticket 58795
+	 */
+	public function test_title_metadata_keeps_latest_interleaved_update() {
+		$site_id  = self::$site_id;
+		$callback = static function ( $check, $object_id, $meta_key ) use ( $site_id ) {
+			if ( $site_id === $object_id && 'blogname' === $meta_key ) {
+				update_blog_option( $site_id, 'blogname', 'Latest Catalog 58795' );
+			}
+			return $check;
+		};
+		add_filter( 'update_blog_metadata', $callback, 10, 3 );
+
+		try {
+			update_blog_option( $site_id, 'blogname', 'Earlier Catalog 58795' );
+		} finally {
+			remove_filter( 'update_blog_metadata', $callback, 10 );
+		}
+
+		$this->assertSame( 'Latest Catalog 58795', get_blog_option( $site_id, 'blogname' ) );
+		$this->assertSame( 'Latest Catalog 58795', get_site_meta( $site_id, 'blogname', true ) );
+	}
+
+	/**
+	 * @ticket 58795
+	 */
+	public function test_network_upgrade_backfills_existing_site_title_idempotently() {
+		delete_site_meta( self::$site_id, 'blogname' );
+
+		do_action( 'wpmu_upgrade_site', self::$site_id );
+		do_action( 'wpmu_upgrade_site', self::$site_id );
+
+		$this->assertSame(
+			array( get_blog_option( self::$site_id, 'blogname' ) ),
+			get_site_meta( self::$site_id, 'blogname' )
+		);
+	}
+
+	/**
+	 * @ticket 58795
+	 */
+	public function test_uninitialization_removes_title_metadata() {
+		$site_id = self::factory()->blog->create( array( 'title' => 'Removed Catalog 58795' ) );
+
+		$this->assertTrue( wp_uninitialize_site( $site_id ) );
+		$this->assertFalse( metadata_exists( 'blog', $site_id, 'blogname' ) );
+	}
 }