Connect MySql database using PHP Language

<?php
$servername = "localhost"; 
$username = "username"; // when you work in your computer then use username name "root"
$password = "password"; // when you work in your computer then use password Empty

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

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