Microsoft has released the May 2008 CTP of SQL Server 2005 Driver for PHP
>> SQL Server 2005 Driver for PHP CTP (May 2008)
Download the SQL Server 2005 Driver for PHP CTP for May 2008, a PHP 5 extension that allows for the reading and writing of SQL Server data from within PHP scripts.
>> SQL Server 2005 Driver for PHP CTP (May 2008)