try
{
   $options = array(
  PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
  PDO::MYSQL_ATTR_INIT_COMMAND => "SET NAMES utf8",
  PDO::MYSQL_ATTR_SSL_KEY => '<configdir>/client-key.pem',
  PDO::MYSQL_ATTR_SSL_CERT  => <configdir>/client-cert.pem',
  PDO::MYSQL_ATTR_SSL_CA => '<configdir>/ca.pem',
  PDO::MYSQL_ATTR_SSL_VERIFY_SERVER_CERT => false
   );
   $pdo = new PDO("mysql:host=<dbhost>;port=<dbport>;dbname=<dbname>;charset=utf8", "<dbuser>", "<dbpassword>", $options);
}
catch(\PDOException $e)
{
   echo $e->getMessage();
   echo $e->getCode();
   die('Failed connecting');
}