How do I install MS SQL drivers for PHP on Ubuntu.
There is no support for mssql directly under Ubuntu. There are a couple options.
I believe you can get some functionality by using the sybase module.
Another option would be to access the server via odbc. Install php5-odbc and tdsodbc.
The mssql extension that is part of PHP will only function when PHP is built on Windows. http://www.php.net/manual/en/intro.mssql.php
There is another driver/extension from Microsoft that supports PHP, but appears to only be functional on Windows. http://www.codeplex.com/SQLSRVPHP