title: Connect to MSSQL server via PHP PDO over SSL
body: <p>I have a working connection to an MSSQL server via PHP PDO.</p>
  
  <pre><code>$mssql = new PDO('dblib:host=1.2.3.4;dbname=databasename', 'username', 'password');
  </code></pre>
  
  <p>I now need this connection to be secure, sending all transactions over SSL. I do not see <a href="http://php.net/manual/en/ref.pdo-dblib.php" rel="nofollow noreferrer">any references to secure connections in the PHP manual</a> for the DBLIB driver.</p>
  
  <p>Can someone provide some insight on how I might enable this connection over SSL? (I have the ability to export and import certificates across both servers, if needed.)</p>
  
  <p><strong>EDIT:</strong> I'm on PHP 5.5.9.</p>