<?php
// Ex01_answer.php

$dsn = "mysql:host=localhost;dbname=employee_db;charset=utf8";
$username = "rezouser";
$password = "Rezo_0000";

try {
    $pdo = new PDO($dsn, $username, $password);
    $pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
    echo "接続しました";
} catch (PDOException $e) {
    echo "接続エラー: " . $e->getMessage();
} finally {
    $pdo = null;
}