1. Install FreeTDS and the PHP MS SQL extension
sudo apt-get install freetds-common freetds-bin unixodbc php5-sybase
Note: That is correct – the MS SQL extension is in the “php5-sybase” package.
2. Restart Apache
sudo /etc/init.d/apache2 restart
3. Test FreeTDS
tsql -H your.server.name -p 1433 -U yourusername -P yourpassword -D yourdatabasename
If it connects, it’s working.