<?php
// connect.php
$dbh = new mysqli('localhost', 'hcm_rain', 'rainning123', 'hcm_rain', 3306);
if ($dbh->connect_errno) {
    die('Connect error: ' . $dbh->connect_error);
}
$dbh->set_charset('utf8mb4'); // chuẩn Unicode
// $dbh->query("SET time_zone = '+07:00'"); // tùy chọn
?>