<?php
// Declarations
$hostname = "localhost";
$username = "dbuser";
$password = "unknown";
$db = "myDB";

// Database connection using MYSQLi
$conn = new mysqli($hostname, $username, $password, $db);
mysqli_query($conn,"SELECT * FROM table");

// Database connection using PDO with MySQL Driver
$conn = new PDO("mysql:host=$hostname;dbname=db", $username, $password);
$conn->query("SELECT * FROM table");
?>