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:
This extension has been moved to the
» PECL repository and is no longer bundled with
PHP as of PHP 5.1.0.