connecting mysql to php

gistfile1.txt

<?php 

$host = 'localhost';
$user = 'root';
$password = "";
$dbname = "myapp";

//create connection 

$conn = new mysqli($host,$user,$password,$dbname);

//check connection 

if ($conn->connect_error) {

	die('connection failed : ' . $conn->connect_error);
}

echo "connected successfully";