index.php

<?php echo "Rujira Thongklung 65160015";



//<?php
$servername = "db";
$username = "demo";
$password = "Noon+020347";

//Create connection
$conn = new mysqli($servername, $username, $password);

// Check connection
if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
}
echo "Connected successfully";
?>