+ $sidebars_widgets = get_option( 'sidebars_widgets', array() );
+ $_sidebars_widgets = array();
+
+ if ( isset($sidebars_widgets['wp_inactive_widgets']) || empty($sidebars_widgets) )
+ $sidebars_widgets['array_version'] = 3;
+ elseif ( !isset($sidebars_widgets['array_version']) )
+ $sidebars_widgets['array_version'] = 1;
+
+ switch ( $sidebars_widgets['array_version'] ) {
+ case 1 :
+ foreach ( (array) $sidebars_widgets as $index => $sidebar )
+ if ( is_array($sidebar) )
+ foreach ( (array) $sidebar as $i => $name ) {
+ $id = strtolower($name);
+ if ( isset($wp_registered_widgets[$id]) ) {
+ $_sidebars_widgets[$index][$i] = $id;
+ continue;
+ }
+ $id = sanitize_title($name);
+ if ( isset($wp_registered_widgets[$id]) ) {
+ $_sidebars_widgets[$index][$i] = $id;
+ continue;
+ }
+
+ $found = false;
+
+ foreach ( $wp_registered_widgets as $widget_id => $widget ) {
+ if ( strtolower($widget['name']) == strtolower($name) ) {
+ $_sidebars_widgets[$index][$i] = $widget['id'];
+ $found = true;
+ break;
+ } elseif ( sanitize_title($widget['name']) == sanitize_title($name) ) {
+ $_sidebars_widgets[$index][$i] = $widget['id'];
+ $found = true;
+ break;
+ }
+ }
+
+ if ( $found )
+ continue;
+
+ unset($_sidebars_widgets[$index][$i]);
+ }
+ $_sidebars_widgets['array_version'] = 2;
+ $sidebars_widgets = $_sidebars_widgets;
+ unset($_sidebars_widgets);
+
+ case 2 :
+ $sidebars_widgets = retrieve_widgets();
+ $sidebars_widgets['array_version'] = 3;
+ update_option( 'sidebars_widgets', $sidebars_widgets );
+ }
+}
+
+/**
+ * Execute changes made in WordPress 3.4.
+ *
+ * @since 3.4.0
+ */
+function upgrade_340() {
+ global $wp_current_db_version, $wpdb;
+
+ if ( $wp_current_db_version < 19798 ) {
+ $wpdb->hide_errors();
+ $wpdb->query( "ALTER TABLE $wpdb->options DROP COLUMN blog_id" );
+ $wpdb->show_errors();
+ }
+
+ if ( $wp_current_db_version < 19799 ) {
+ $wpdb->hide_errors();
+ $wpdb->query("ALTER TABLE $wpdb->comments DROP INDEX comment_approved");
+ $wpdb->show_errors();
+ }
+
+ if ( $wp_current_db_version < 20022 && is_main_site() && ! defined( 'DO_NOT_UPGRADE_GLOBAL_TABLES' ) ) {
+ $wpdb->query( "DELETE FROM $wpdb->usermeta WHERE meta_key = 'themes_last_view'" );
+ }
+
+ if ( $wp_current_db_version < 20080 ) {
+ if ( 'yes' == $wpdb->get_var( "SELECT autoload FROM $wpdb->options WHERE option_name = 'uninstall_plugins'" ) ) {
+ $uninstall_plugins = get_option( 'uninstall_plugins' );
+ delete_option( 'uninstall_plugins' );
+ add_option( 'uninstall_plugins', $uninstall_plugins, null, 'no' );
+ }
+ }
+}
+
+/**
+ * Execute changes made in WordPress 3.5.
+ *
+ * @since 3.5.0
+ */
+function upgrade_350() {
+ global $wp_current_db_version, $wpdb;
+
+ if ( $wp_current_db_version < 22006 && $wpdb->get_var( "SELECT link_id FROM $wpdb->links LIMIT 1" ) )
+ update_option( 'link_manager_enabled', 1 ); // Previously set to 0 by populate_options()
+
+ if ( $wp_current_db_version < 21811 && is_main_site() && ! defined( 'DO_NOT_UPGRADE_GLOBAL_TABLES' ) ) {
+ $meta_keys = array();
+ foreach ( array_merge( get_post_types(), get_taxonomies() ) as $name ) {
+ if ( false !== strpos( $name, '-' ) )
+ $meta_keys[] = 'edit_' . str_replace( '-', '_', $name ) . '_per_page';
+ }
+ if ( $meta_keys ) {
+ $meta_keys = implode( "', '", $meta_keys );
+ $wpdb->query( "DELETE FROM $wpdb->usermeta WHERE meta_key IN ('$meta_keys')" );
+ }
+ }
+
+ if ( $wp_current_db_version < 22422 && $term = get_term_by( 'slug', 'post-format-standard', 'post_format' ) )
+ wp_delete_term( $term->term_id, 'post_format' );
+}
+
+/**
+ * Execute changes made in WordPress 3.7.
+ *
+ * @since 3.7.0
+ */
+function upgrade_370() {
+ global $wp_current_db_version;
+ if ( $wp_current_db_version < 25824 )
+ wp_clear_scheduled_hook( 'wp_auto_updates_maybe_update' );
+}
+
+/**
+ * Execute changes made in WordPress 3.7.2.
+ *
+ * @since 3.7.2
+ * @since 3.8.0
+ */
+function upgrade_372() {
+ global $wp_current_db_version;
+ if ( $wp_current_db_version < 26148 )
+ wp_clear_scheduled_hook( 'wp_maybe_auto_update' );
+}
+
+/**
+ * Execute changes made in WordPress 3.8.0.
+ *
+ * @since 3.8.0
+ */
+function upgrade_380() {
+ global $wp_current_db_version;
+ if ( $wp_current_db_version < 26691 ) {
+ deactivate_plugins( array( 'mp6/mp6.php' ), true );
+ }
+}
+
+/**
+ * Execute changes made in WordPress 4.0.0.
+ *
+ * @since 4.0.0
+ */
+function upgrade_400() {
+ global $wp_current_db_version;
+ if ( $wp_current_db_version < 29630 ) {
+ if ( ! is_multisite() && false === get_option( 'WPLANG' ) ) {
+ if ( defined( 'WPLANG' ) && ( '' !== WPLANG ) && in_array( WPLANG, get_available_languages() ) ) {
+ update_option( 'WPLANG', WPLANG );
+ } else {
+ update_option( 'WPLANG', '' );
+ }
+ }
+ }
+}
+
+/**
+ * Execute changes made in WordPress 4.2.0.
+ *
+ * @since 4.2.0
+ */
+function upgrade_420() {
+ global $wp_current_db_version, $wpdb;
+
+ if ( $wp_current_db_version < 31351 && $wpdb->charset === 'utf8mb4' ) {
+ if ( is_multisite() ) {
+ $tables = $wpdb->tables( 'blog' );
+ } else {
+ $tables = $wpdb->tables( 'all' );
+ }
+
+ foreach ( $tables as $table ) {
+ maybe_convert_table_to_utf8mb4( $table );
+ }