<?php

    $dsn = 'mysql:dbname=yourdatabasename;host=127.0.0.1;charset=utf8mb4';
    $user = 'user';
    $pass = 'pass';

    $pdo = new PDO($dsn, $user, $pass, array(PDO::ATTR_EMULATE_PREPARES => true,
                                             PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION));

?>