Connect to mssql server in CodeIgniter 3. This will probably apply on any php version, just I had v 7.3 at this point. The setup is really easy, I even used mssql on my linux machine locally.
CodeIgniter is an open source web application framework for use in building dynamic web sites with PHP. It enables developers to develop projects much faster than...writing code from scratch, by providing a rich set of libraries for commonly needed tasks, as well as a simple interface and logical structure to access these libraries. CodeIgniter is loosely based on the popular Model-View-Controller development pattern. CodeIgniter is most often noted for its speed when compared to other PHP frameworks.