<link href="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/js/bootstrap.min.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<!------ Include the above in your HEAD tag ---------->
<?php
$hostname = "localhost";
$user = "root";
$password = "";
$database = "ahbordo";
$conexao = mysqli_connect($hostname, $user, $password, $database);
if (!$conexao)
{
echo "Falha na conexão com o Banco de Dados";
}
?>