<?php

$user = 'erdo';
$pass = 'titok';
$host = 'localhost';
$dbname = 'erdo';

try {
    $conn = new PDO("mysql:host=$host;dbname=$dbname", $user, $pass);
    $conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
    echo "Sikeres kapcsolat";
}catch(PDOException $e) {
    echo $e->getMessage();
}

$conn = null;