How to connect with database in php

In simple words, change the details like username, and password according to your environment.
$server= "localhost";
$user = "username";
$pass = "password";
$db = "database_name";
$conn = new mysqli($server, $user, $pass, $db);
if($conn->connect_error){
die("error:". $conn->connect_error);
}
Watch the youtube video here...