I just launched a phpMyAdmin droplet as a 1 click app. But I cannot connect to it from PHP on my local machine.

I've got it set up like so -

// database connection
$db_username = 'user';
$db_password = 'xxx';
$db_database = 'db_name';
$db_host = "123.456.789.100";

// connect to DB
try {
    $dbh = new PDO("mysql:host=$db_host;dbname=$db_database;charset=utf8", $db_username, $db_password);
} catch (PDOException $e) {
    print "Error!: " . $e->getMessage(); die();
}

It works for my other databases, but not on digitalocean :/