The dbx module is a database abstraction layer (db 'X', where 'X' is a supported database). The dbx functions allow you to access all supported databases using a single calling convention. The dbx-functions themselves do not interface directly to the databases, but interface to the modules that are used to support these databases.
Note: 本扩展已被移动到 » PECL 库中且自以下版本起不再被绑定到 PHP 中：5.1.0.