我有一个应用程序需要将多维数组存储到多个 mysql 表中。遍历数组时，我需要找到特定的键，将值插入数据库并将创建的 DB ID 传递给数组中的子元素。例如，如果有一个键“unit”，找到它，获取标题，插入数据库，返回 id，将该 id 传递给下一次迭代。在下一次迭代中，我从单元中获取 id 并搜索类(class)，使用单元 id 保存类(class)。

这是数组的层次结构。

单位
-类(class)
-测验
--问题
---答案

这是一个帖子表单的输出示例。有随机生成的 ID，因为表单是由用户动态创建的。我应该坚持使用 for 循环还是使用递归来解决我的问题？如果这里可以递归，我们将不胜感激。谢谢。

Array
(
[unit] => Array
    (
        [fa53a225-e10c-408b-ad98-f3be26670587] => Array
            (
                [title] => Unit 1
                [lesson] => Array
                    (
                        [ae89d2bd-bb06-42ed-be5d-76d450fa1d68] => Array
                            (
                                [title] => Lesson 1
                            )

                        [79245a3a-e3e8-4aa2-9b5b-35cef4740d93] => Array
                            (
                                [title] => Lesson 2
                            )

                        [34c30554-3b4c-4c5f-b398-4dbc7a2f2d00] => Array
                            (
                                [title] => Lesson 3
                            )

                        [28241d75-1733-47e1-aa34-133bc71ef382] => Array
                            (
                                [title] => Lesson 4
                            )

                    )

                [quiz] => Array
                    (
                        [e93b5973-e13d-4a2d-a60a-4f86721b8f5a] => Array
                            (
                                [title] => Quiz 1
                                [question] => Array
                                    (
                                        [5e9d4f74-af08-430d-a405-e4d5464aff4a] => Array
                                            (
                                                [title] => Question 1
                                                [type] => truefalse
                                                [answer] => false
                                            )

                                        [b848cd75-bae4-44dd-99b0-ba041cd74b87] => Array
                                            (
                                                [title] => Question 2
                                                [type] => truefalse
                                                [answer] => true
                                            )

                                        [f5c72134-2de2-4fc4-8601-1776e43461e9] => Array
                                            (
                                                [title] => Question 3
                                                [type] => multiple
                                                [correct] => Array
                                                    (
                                                        [0] => 0
                                                        [1] => 1
                                                    )

                                                [answer] => Array
                                                    (
                                                        [0] => answer 1
                                                        [1] => answer 2
                                                        [2] => answer 3
                                                        [3] => 
                                                        [4] => 
                                                    )

                                            )

                                    )

                            )

                    )

            )

        [a8a42316-f5fb-4b44-bd41-e19e8f3fb8e0] => Array
            (
                [title] => Unit 2
                [lesson] => Array
                    (
                        [b438f957-7386-4202-8ff0-61fcdb020ba6] => Array
                            (
                                [title] => Lesson 1
                            )

                        [c6513c26-2d2f-4835-8fe7-9f4c82ea459d] => Array
                            (
                                [title] => Lesson 2
                            )

                        [d6853af6-e3a8-4e17-9df8-eeddb5859483] => Array
                            (
                                [title] => Lesson 3
                            )

                    )

                [quiz] => Array
                    (
                        [96c1b4c2-1e00-4702-9064-25fcea6e10bb] => Array
                            (
                                [title] => Quiz 1
                                [question] => Array
                                    (
                                        [fc44b82e-089c-47b0-8404-9c12a9ecb2d6] => Array
                                            (
                                                [title] => question 1
                                                [type] => truefalse
                                                [answer] => true
                                            )

                                    )

                            )

                    )

            )

    )
)

最佳答案

我更喜欢递归，因为它更灵活

$structure = ["Unit"=>
                      ["Lesson"=>[],
                       "Quiz"=>
                               ["Question"=>
                                            ["Answers"=>[]]]]];

function insertItems($array, $parent_db_id, $structure) {

   // at first step $object_name=Unit, at second Lesson, quiz
   foreach ($structure as $object_name=>$next_level_structure) {

     // loop through objects (at first step units, at second Lessons, quizes)
     foreach ($array[$object_name] as $object_id=>$object) {

       // ... insert in db $object_id, $object['title'], $parent_db_id etc
       // retrieve $inserted_db_id ...

       // next recursion level if next level not empty
       if ($next_level_structure) {
          insertItems($object, $inserted_db_id, $next_level_structure);
          }
       }  
     }

}

insertItem($data, null, $structure);

关于php - 将多维数组插入mysql PHP的递归函数，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/31665817/