<?php
 echo 'Проверка работоспособности проекта!';

 $db = mysqli_connect( "127.0.0.1", "root", "root");
 mysqli::select_db("database", $db);

 $result = mysqli::query("SELECT * FROM `users` ");
 var_dump($result);

$db_hostname = 'localhost';
  $db_database = 'db';
  $db_username = 'root';
  $db_password = 'root';
  mysqli_report(MYSQLI_REPORT_STRICT);
  try {
    $connection = new mysqli($db_hostname, $db_username, $db_password, $db_database);
  } catch (Exception $e) {
    exit('Хьюстон, у нас проблемы...');
  }

$query = "SELECT * FROM users";
$result = $connection->query($query);
if (!$result) {die($connection->error);};
$myrow = $result->fetch_array(MYSQLI_ASSOC);
echo $myrow['ИМЯ СТОЛБЦА'];