<?php
if (ISSET($_POST['create'])) {
    $db_server  = "localhost";
    $db_user    = "root";
    $db_pass    = "";
    $db_name    = $_POST['db_name'];

    $conn = mysqli_connect($db_server, $db_user, $db_pass);

    if (!$conn) {
        die("Error: Failed to connection to database". mysqli_connect_error());
    }
    if (mysqli_query($conn, "CREATE DATABASE $db_name")) {
        echo "<label class='text-success'>Database'".$db_name."' create succesfully </label>";
    }else{
        echo "<label class='text-danger'>Error!:".mysqli_error($conn)."</label>";
    }
    mysqli_close($conn);
}

 ?>