Here is the original article and the interbase/firebird mention
Codegear (now a subsidiary of Borland) has just released version 1.0 of Delphi for PHP, a RAD development environment (running on Windows) that produces standard PHP code. It features a large set of built-in components, including ones that use AJAX for database access; and Codegear is encouraging users to develop their own components. The framework, VCL for PHP, is open source, and documentation follows the PHP model. Initial database connectivity is for MySQL and Interbase (Codegear’s commercial database that spawned the open-source Firebird), but more are promised.