$db_servername = "localhost";
$db_username = "root";
$db_password = "";
$db_name = "test";

// Create connection
$con = mysqli_connect($db_servername, $db_username, $db_password, $db_name);

// Check connection
if (!$con) {
    die("Connection failed: " . mysqli_connect_error());
}
echo "Couldn't connect to database";