Question

对于多项选择测验应用程序，我想用正确答案显示虚拟答案。但正确答案在每个不同的问题上处于不同的位置。

这是我尝试过的，但它似乎没有起作用：

if ($question->type == 1)
            {   

                echo "<div id='dummy_answers'>";
                //Show Dummy
                echo '<h3>Dummy Answers</h3>';
                //Get Dummy Answers
                $query = $this->test_model->getDummyAnswers($question->id);
                $dummy_num = 1;
                foreach ($query->result() as $row)
                {
                    $rand_number = rand(1, 3);
                    if ($dummy_num == $rand_number)
                    {
                        $dummy_num = $rand_number + 2;
                        echo '<h4>Answer '.$dummy_num.'</h4>';
                        echo '<p>';
                        echo $row->option;
                        echo '</p>';
                        //Now echo the real answer
                        echo '<h4>Answer '.$rand_number.'</h4>';
                        echo '<p>';
                        echo $row->option;
                        echo '</p>'; //Get id's for each.echo $row->id;         
                    }
                    else
                    {
                        echo '<h4>Answer '.$dummy_num.'</h4>';
                        echo '<p>';
                        echo $row->option;
                        echo '</p>';
                        $dummy_num++;
                    }
                }
                echo '</div>';
                echo '  <hr/>';
            }
        ?>

Answer 1

您应该使用shuffle function。在你的情况下，它将是：

if ($question->type == 1)
  { 
    echo "<div id='dummy_answers'>";
    //Show Dummy
    echo '<h3>Dummy Answers</h3>';
    //Get Dummy Answers
    $query = $this->test_model->getDummyAnswers($question->id);
    $answers=$query->result();
    shuffle($answers);
    foreach ($answers as $nr=>$row)
    {
        echo '<h4>Answer '.($nr+1).'</h4>';
        echo '<p>';
        echo $row->option;
        echo '</p>';
    }
    echo '</div>';
    echo '  <hr/>';
  }
?>

Answer 2

使用shuffle

将答案放在数组中

$random_array = shuffle($answers);

Answer 3

您可以将结果放入数组（1个正确，3个不正确），然后shuffle，然后输出它们？

$answers = array();

array_push($answers, "answer1");
array_push($answers, "answer2");
array_push($answers, "answer3");
array_push($answers, "answer4");

shuffle($answers);

foreach ($answers as $answer) {
    echo $answer;
}

Answer 4

您需要做的就是将答案的键放在一个数组中并拨打shuffle()。像这样：

$keys = array_keys($answers);
shuffle($keys);
for ($key in $keys) {
   echo $answers[$key];
}

Answer 5

我建议将所有答案放入一个数组中，然后使用shuffle()函数将它们随机化。一旦它们被洗牌，只需用循环迭代数组并构建标记。

随机化数据集的最快方法是什么？

5 个答案: