Prerequisites for installation and usage: Install SQL Server 2005 or later, and the SQL Server Driver for PHP version 1.1 (http://msdn.microsoft.com/en-us/library/cc296170(v=SQL.90).aspx), and configure the SQL Server installation using SQL Server Management Studio with the following command:
USE MASTER
GO
ALTER DATABASE <your-database-name> SET READ_COMMITTED_SNAPSHOT ON
GO