Now Connect PHP website running in Linux Apache Webserver to SQL Server

How?

Here is the answer:

Preview of SQL Server ODBC driver for Linux is now available for download:

Download Link:

The Microsoft SQL Server ODBC Driver for Linux provides native connectivity from Linux to Microsoft SQL Server

https://www.microsoft.com/download/en/details.aspx?id=28160

More info:

https://blogs.technet.com/b/dataplatforminsider/archive/2011/11/28/available-today-preview-release-of-the-sql-server-odbc-driver-for-linux.aspx