MS SQL Server Azure - PHP msssql_connect（）连接到不同于master的数据库

I am restricted to use only PHP mssql module to use with MS Azure SQL Server.

I am able to maintain connection by adding: ~/.freetds.conf:

[aftermath]
    database = mydatabase
    host = myhostname.database.windows.net
    port = 1433
    tds version = 8.0

My code in PHP

$myServer = "aftermath"
$myUser = username@hostname
$myPass = obviously_my_pass

$dbhandle = mssql_connect($myServer, $myUser, $myPass)
  or die("Couldn't connect to SQL Server on $myServer");

But when I check which database is selected it returns:

 master

instead of my desired database which is specified in my freetds.conf file

Module sqlsrv is not installed on my hosting and I do not have rights to install it.

Can you tell me how can I resolve this issue?