<?php
function db(): PDO {
    static $pdo = null;
    if ($pdo instanceof PDO) {
        return $pdo;
    }

    $config = require __DIR__ . '/../config.php';
    $db = $config['db'];
    $dsn = sprintf('mysql:host=%s;dbname=%s;charset=%s', $db['host'], $db['name'], $db['charset']);

    $pdo = new PDO($dsn, $db['user'], $db['pass'], [
        PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
        PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
        PDO::ATTR_EMULATE_PREPARES => false,
    ]);

    return $pdo;
}