Introduction

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.

Requirements

To be able to use a database with the dbx-module, the module must be either linked or loaded into PHP, and the database module must be supported by the dbx-module. Currently, following databases are supported, but others will follow (soon, I hope :-):

• FrontBase (available from PHP 4.1.0).

• Microsoft SQL Server

• MySQL

• ODBC

• PostgreSQL

• Sybase-CT (available from PHP 4.2.0).

Documentation for adding additional database support to dbx can be found at http://www.guidance.nl/php/dbx/doc/.

Installation

In order to have these functions available, you must compile PHP with dbx support by using the --enable-dbx option and all options for the databases that will be used, e.g. for MySQL you must also specify --with-mysql=[DIR]. To get other supported databases to work with the dbx-module refer to their specific documentation.

Runtime Configuration

This extension has no configuration directives defined in php.ini.

Resource Types

There are two resource types used in the dbx module. The first one is the link-object for a database connection, the second a result-object which helds the result of a query.

Predefined Constants

The constants below are defined by this extension, and will only be available when the extension has either been compiled into PHP or dynamically loaded at runtime.