connect.php

<?php
$host = '127.0.0.1';
$db   = 'users';
$user = 'root';
$pass = '123';
$port = '3308';
$charset = 'utf8mb4';
$options = [
    PDO::ATTR_ERRMODE            => PDO::ERRMODE_EXCEPTION,
    PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
    PDO::ATTR_EMULATE_PREPARES   => false,

];
$pdo = new PDO("mysql:host=$host;dbname=$db;port=$port;charset=$charset", $user, $pass, $options);
?>