SQLSRV is not exactly a "driver": it's a completely different PHP extension to access SQL Server databases and it has its own syntax and features. It's a Windows-only library developed and maintained by Microsoft and it's not related to the built-in SQL Server extension described here.
(Whatever, it's quite feature-rich and it's easy to learn.)
این توابع به شما امکان دسترسی به پایگاه داده MS SQL Server را میدهد.
This extension is not available anymore on Windows with PHP 5.3 or later.
SQLSRV درایور جایگزین MS SQL از Microsoft موجود است: » http://msdn.microsoft.com/en-us/sqlserver/ff657782.aspx موجود است