Found this via Newsforge. I can talk to a MS-SQL server from linux using the Zend IDE, but I havne’t tried using unixODBC…
Green Leaf Technologies – Connecting to a SQL Server database from a Linux box with UnixODBC/PHP
This article explains how to connect from a Linux (or Unix) based server to an MS SQL Server using a combination of unixODBC and PHP. PHP’s documentation covers connecting to a SQL Server from a Windows machine running PHP, but not a Unix/Linux machine.