I have been banging my head against the wall for the last 6 hours.
I have a FreeBSD 10 server with PHP 7 installed.
Using the commands is isql -v DSN 'USERNAME' 'PASS' I can login to my remote MSSQL server and run commands.
I installed PHP with PKG.
Since it wasn't configured at runtime and wasn't compiled, use..
Pkg install php.7.odbc