http://forum.miroslawzelent.pl/99234/php-czemu-tutaj-jest-blad?show=99271#c99271

index.php

<?php
/**
 * Created by PhpStorm.
 * User: efik
 * Date: 15.01.16
 * Time: 20:03
 */

// Gdzieś w innym pliku połączenie do PDO.
/** @var $polaczenie PDO */

foreach (range(0, 10) as $index) {
    $randomNumber = mt_rand(0, 20);

    $prepared = $polaczenie->prepare("SELECT costam,costam,costam FROM pytania WHERE id =:id");
    $prepared->bindParam(
        ":id",
        $randomNumber,
        PDO::PARAM_INT
    );
    if ($prepared->execute()) {
        $question = $prepared->fetchAll(PDO::FETCH_ASSOC);
        print_r($question); // Array(19) { ... }
    }
}