connection

<?php

$dbhost = "localhost";
$dbuser = "root";
$dbpass = "";
$dbname = "demo";

$conn = new mysqli($dbhost, $dbuser, $dbpass, $dbname);

$db_connected;

if($conn->connect_error) {
    echo "Database does not exist <br \><br \>";
    return false;
} else {
    echo "Database exists and is connected <br \><br \>";
    return true;
}

echo $db_connected;

?>