在 PHP 中从顺序数组创建嵌套数组

Question

我需要在 PHP 中对数组进行排序的帮助。我收到这些数组，如下所示：Array (    [0] => Array (        [0] => Array (            [id] => 1            [username] => STLUserFolks            [event_id] => 7e0a2faa-43c8-4552-b0ec-c4d0fa6c00d1            [event_on] => 2020-06-29 17:39:25.93432            [ent_pix] =>            [\"images/events/STLUserFolks/tammy1.jpeg\",\"images/events/STLUserFolks/tammy2.jpeg\",\"images/events/STLUserFolks/tammy3.jpeg\",\"images/events/STLUserFolks/tammy4.jpeg\",\"images/events/STLUserFolks/tammy5.jpeg\",\"images/events/STLUserFolks/tammy6.jpeg\"]            [amount] => 20            [event_title] => Fun on vacation with friends.            [event_type] => mix            [event_details] => Saw Great and interesting sites today!        )    )    [1] => Array (        [0] => Array (            [id] => 1            [username] => STLUserFolks            [event_id] => debd6476-4f24-4d2c-9973-7c36d256079d            [event_on] => 2020-07-09 05:39:10.588842            [ent_pix] =>            [\"images/events/STLUserFolks/680.JPG\",\"images/events/STLUserFolks/681.JPG\",\"images/events/STLUserFolks/682.JPG\"]            [amount] => 25            [event_title] => Sexy Warm            [event_type] => photos            [event_details] => Feeling the sun on our faces.        )        [1] => Array (            [id] => 1            [user_id] => 2            [username] => STLUserFolks            [member_user] => spiffy_user            [comment_text] => Amazing! you guys are simply amazing!            [created_on] => 2020-07-10 15:04:46.480001            [comment_id] => c803294d-8483-43c9-a76b-4cba56795266            [event_id] => debd6476-4f24-4d2c-9973-7c36d256079d        )    )    [2] => Array (        [0] => Array (            [id] => 1            [username] => STLUserFolks            [event_id] => 3112f8ff-6119-48c4-810c-594585b5dc63            [event_on] => 2020-07-09 07:11:32.840511            [ent_pix] =>            我需要能够循环这些数组以将注释数组（[1] 及以上）应用到主数组 [0]。或者我需要 [0] 之后的顺序数组像这样嵌套：

Answer 1

假设您提供的输入数据位于 data.php 中：

<?php

$data = include('data.php');

$result = [];

foreach ($data as $row) {

  $user = $row[0];

  foreach ($row as $k => $element) {

    if ($k === 0) {

      $user = $element;

      $user['user_comments'] = [];   

    } else {

      $user['user_comments'][] = $element;

    }

  }

  $result[] = $user;

}

var_dump($result);

结果是：

array(3) {

  [0]=>

  array(10) {

    ["id"]=>

    int(1)

    ["username"]=>

    string(12) "STLUserFolks"

    ["event_id"]=>

    string(36) "7e0a2faa-43c8-4552-b0ec-c4d0fa6c00d1"

    ["event_on"]=>

    string(25) "2020-06-29 17:39:25.93432"

    ["ent_pix"]=>

    array(6) {

      [0]=>

      string(38) "images/events/STLUserFolks/tammy1.jpeg"

      [1]=>

      string(38) "images/events/STLUserFolks/tammy2.jpeg"

      [2]=>

      string(38) "images/events/STLUserFolks/tammy3.jpeg"

      [3]=>

      string(38) "images/events/STLUserFolks/tammy4.jpeg"

      [4]=>

      string(38) "images/events/STLUserFolks/tammy5.jpeg"

      [5]=>

      string(38) "images/events/STLUserFolks/tammy6.jpeg"

    }

    ["amount"]=>

    int(20)

    ["event_title"]=>

    string(29) "Fun on vacation with friends."

    ["event_type"]=>

    string(3) "mix"

    ["event_details"]=>

    string(38) "Saw Great and interesting sites today!"

    ["user_comments"]=>

    array(0) {

    }

  }

  [1]=>

  array(10) {

    ["id"]=>

    int(1)

    ["username"]=>

    string(12) "STLUserFolks"

    ["event_id"]=>

    string(36) "debd6476-4f24-4d2c-9973-7c36d256079d"

    ["event_on"]=>

    string(26) "2020-07-09 05:39:10.588842"

    ["ent_pix"]=>

    array(3) {

      [0]=>

      string(34) "images/events/STLUserFolks/680.JPG"

      [1]=>

      string(34) "images/events/STLUserFolks/681.JPG"

      [2]=>

      string(34) "images/events/STLUserFolks/682.JPG"

    }

    ["amount"]=>

    int(25)

    ["event_title"]=>

    string(9) "Sexy Warm"

    ["event_type"]=>

    string(6) "photos"

    ["event_details"]=>

    string(29) "Feeling the sun on our faces."

    ["user_comments"]=>

    array(1) {

      [0]=>

      array(8) {

        ["id"]=>

        int(1)

        ["user_id"]=>

        int(2)

        ["username"]=>

        string(12) "STLUserFolks"

        ["member_user"]=>

        string(11) "spiffy_user"

        ["comment_text"]=>

        string(37) "Amazing! you guys are simply amazing!"

        ["created_on"]=>

        string(26) "2020-07-10 15:04:46.480001"

        ["comment_id"]=>

        string(36) "c803294d-8483-43c9-a76b-4cba56795266"

        ["event_id"]=>

        string(36) "debd6476-4f24-4d2c-9973-7c36d256079d"

      }

    }

  }

  [2]=>

  array(10) {

    ["id"]=>

    int(1)

    ["username"]=>

    string(12) "STLUserFolks"

    ["event_id"]=>

    string(36) "3112f8ff-6119-48c4-810c-594585b5dc63"

    ["event_on"]=>

    string(26) "2020-07-09 07:11:32.840511"

    ["ent_pix"]=>

    array(4) {

      [0]=>

      string(40) "images/events/STLUserFolks/IMG_2135.JPEG"

      [1]=>

      string(40) "images/events/STLUserFolks/IMG_2136.JPEG"

      [2]=>

      string(40) "images/events/STLUserFolks/IMG_2137.JPEG"

      [3]=>

      string(40) "images/events/STLUserFolks/IMG_2140.JPEG"

    }

    ["amount"]=>

    int(25)

    ["event_title"]=>

    string(9) "New Pants"

    ["event_type"]=>

    string(6) "photos"

    ["event_details"]=>

    string(32) "Do these jeans make me look big?"

    ["user_comments"]=>

    array(2) {

      [0]=>

      array(8) {

        ["id"]=>

        int(1)

        ["user_id"]=>

        int(1)

        ["username"]=>

        string(12) "STLUserFolks"

        ["member_user"]=>

        string(8) "Some.Guy"

        ["comment_text"]=>

        string(17) "Wish I was there!"

        ["created_on"]=>

        string(26) "2020-07-10 10:45:42.809338"

        ["comment_id"]=>

        string(36) "19115a3e-87ca-410c-aade-c47122068bca"

        ["event_id"]=>

        string(36) "3112f8ff-6119-48c4-810c-594585b5dc63"

      }

      [1]=>

      array(8) {

        ["id"]=>

        int(1)

        ["user_id"]=>

        int(2)

        ["username"]=>

        string(12) "STLUserFolks"

        ["member_user"]=>

        string(11) "spiffy_user"

        ["comment_text"]=>

        string(27) "Looks like an amazing time."

        ["created_on"]=>

        string(26) "2020-07-10 15:09:05.275935"

        ["comment_id"]=>

        string(36) "bfd4d4e3-1c88-4f03-936f-cd456dba6096"

        ["event_id"]=>

        string(36) "3112f8ff-6119-48c4-810c-594585b5dc63"

      }

    }

  }

}

那是你要的吗？

与您预期结果的唯一区别是，每一行都有“user_comments”数组，该数组可以为空，有一个或多个元素与此属性丢失或被调用或user_comment如user_comments您的示例中所示。我相信这更加一致且更易于以编程方式使用，但如果需要，它也可以轻松调整为您发布的内容。

编辑评论和点赞。如果您想同时填写 user_comments 和 user_likes，则必须检测某些数据是否是评论或点赞。我这样做是这样的：如果数据包含comment_id，它是一条评论，如果它有like_id，它是一个喜欢。这是下面附加的简单编辑。片段变成：

foreach ($row as $k => $element) {

    if ($k === 0) {

      $user = $element;

      $user['user_comments'] = [];

      $user['user_likes'] = [];

    } else if (isset($element['comment_id'])) {

      $user['user_comments'][] = $element;

    } else if (isset($element['like_id'])) {

      $user['user_likes'][] = $element;

    }

  }

如果需要，您稍后可以通过这种方式扩展它来处理不同的事件。

Answer 2

我使用该comment_text键来过滤给定线程的评论和非评论，并将所有内容分组user_comments到主线程下。我使用array_map将此过滤器应用于列表中的每个线程。

$flatThreads = \\your initial value

$nestedThreads = array_map(function($thread){

  $notComments = array_filter($thread, function($thread_item){

    return !isset($thread_item["comment_text"]);

  });

  $comments = array_filter($thread, function($thread_item){

    return isset($thread_item["comment_text"]);

  });

  $mainItem = reset($notComments); //get first item that is not a comment

  $mainItem["user_comments"] = $comments;

  return $mainItem;

  

}, $flatThreads);

var_dump($nestedThreads); //what you requested