Class FB is a wrapper to access Firebird databases.Functions of Class FB:- Establish database connections- Execute simple queries- Execute SELECT queries restrict the range of rows that a query returns to perform pagination- Retrieve query result rows as arrays- Retrieve query result BLOB field values- Manage transactions- Verify the syntax of n INSERT query to determine whether it is valid- ...

Metafire is a very simple database abstraction layer for firebird/interbase. To use it, you have to know things about php-function for firebird/interbase. But still you can use it as you use mysql or postgres in a simple way