Description:

Zend_Db and its related classes provide a simple SQL database
interface for Zend Framework. The Zend_Db_Adapter is the basic class
you use to connect your PHP application to an RDBMS. There is a
different Adapter class for each brand of RDBMS. The Zend_Db Adapters
create a bridge from the vendor-specific PHP extensions to a common
interface, to help you write PHP applications once and deploy with
multiple brands of RDBMS with very little effort. The interface of the
Adapter class is similar to the interface of the PHP Data Objects
extension.

Zend_Db provides Adapter classes to PDO drivers for the following
RDBMS brands:
- IBM DB2 and Informix Dynamic Server (IDS), using the pdo_ibm PHP
extension
- MySQL, using the pdo_mysql PHP extension
- Microsoft SQL Server, using the pdo_mssql PHP extension
- Oracle, using the pdo_oci PHP extension
- PostgreSQL, using the pdo_pgsql PHP extension
- SQLite, using the pdo_sqlite PHP extension

In addition, Zend_Db provides Adapter classes that utilize PHP
database extensions for the following RDBMS brands:
- MySQL, using the mysqli PHP extension
- Oracle, using the oci8 PHP extension
- IBM DB2, using the ibm_db2 PHP extension
- Firebird/Interbase, using the php_interbase PHP extension