PHP关联数组获取数组ID [重复]

Question

嗨，我无法理解这个我有以下数组：

Array
(
[questions] => Array
    (
        [585] => Array
            (
                [correct] => 1
                [mark] => 1
                [type] => single_choice
                [answered] => 1
            )

        [596] => Array
            (
                [correct] => 
                [mark] => 0
                [type] => true_or_false
                [answered] => 1
            )

        [595] => Array
            (
                [correct] => 1
                [mark] => 1
                [type] => single_choice
                [answered] => 1
            )

   )

)

我正在尝试在 foreach 语句中获取数组编号，这是我的代码，它适用于除我只需要在 foreach 外观中获得 585,596 ir 595 的数字之外的所有其他内容。

          <?php

               /// $quiz_res is the array 


                foreach($quiz_res['questions'] as $result) {

                      echo key($result); //// DOES NOT WORK 
                      #####  I need to get the number here eg 585 ???

                      echo $result['correct']; /// this works 
                      echo $result['mark']; /// this works 
                      echo $result['type']; /// this works  
                      echo $result['answered']; /// this works 
                }
           ?>

这也无关紧要，但这与learnpress测验的结果有关，如果有人熟悉它们的话。

任何帮助或指针将不胜感激

Answer 1

你必须在 foreach 调用中命名索引：

foreach($quiz_res['questions'] as $id => $result) {

echo $id; // 585