// Created on savesnippets.com · https://savesnippets.com/JxOZfa0kXVXguJ
<?php
function pdoConnect(string $host, string $db, string $user, string $pass): PDO {
    return new PDO(
        "mysql:host=$host;dbname=$db;charset=utf8mb4",
        $user,
        $pass,
        [
            PDO::ATTR_ERRMODE            => PDO::ERRMODE_EXCEPTION,   // throw on errors
            PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,         // assoc arrays
            PDO::ATTR_EMULATE_PREPARES   => false,                    // real prepares
            PDO::ATTR_STRINGIFY_FETCHES  => false,                    // keep int/float types
        ]
    );
}

$db = pdoConnect('localhost', 'myapp', 'user', 'secret');
$rows = $db->query('SELECT id, name FROM users')->fetchAll();