There is no explicit method. It stores link identifier in $wpdb->dbh field, so I guess you could use mysql_close() on it.

Why do you need it btw? If you want to reuse $wpdb it is better to create separate wpdb object instead.

WP 4.5 had introduced wpdb->close() method to close connection in current instance.

Old answer

There is no explicit method. It stores link identifier in $wpdb->dbh field, but it is protected, so not convenient to run close on.

There is no explicit method. It stores link identifier in $wpdb->dbh field, so I guess you could use mysql_close() on it.

Why do you need it btw? If you want to reuse $wpdb it is better to create separate wpdb object instead.

There is no explicit method. It stores link identifier in $wpdb->dbh field, so I guess you could use mysql_close() on it.

Why do you need it btw? If you want to reuse $wpdb it is better to create separate wpdb object instead.