How to output this json?

Question

PHP

there is json:

"tasks": {
    "Введение": {
      "§ 1. Химия — часть естествознания": {
        "1": ["https://gdz-ru.com/attachments/images/tasks/000/049/476/0002/5d5270d21a65c.jpg", "https://gdz-ru.com/attachments/images/tasks/000/049/476/0000/5d52723a2059d.jpg"],
        "2": ["https://gdz-ru.com/attachments/images/tasks/000/049/476/0002/5d5270d21ad0b.jpg", "https://gdz-ru.com/attachments/images/tasks/000/049/476/0000/5d52723a26165.jpg"],
        "3": ["https://gdz-ru.com/attachments/images/tasks/000/049/476/0002/5d5270d21aed3.jpg", "https://gdz-ru.com/attachments/images/tasks/000/049/476/0000/5d52723a263a7.jpg"],
        "4": ["https://gdz-ru.com/attachments/images/tasks/000/049/476/0002/5d5270d21b108.jpg", "https://gdz-ru.com/attachments/images/tasks/000/049/476/0000/5d52723a264d5.jpg"],
        "5": ["https://gdz-ru.com/attachments/images/tasks/000/049/476/0002/5d5270d21b2f5.jpg", "https://gdz-ru.com/attachments/images/tasks/000/049/476/0000/5d52723a26623.jpg"],
        "6": ["https://gdz-ru.com/attachments/images/tasks/000/049/476/0002/5d5270d21b531.jpg", "https://gdz-ru.com/attachments/images/tasks/000/049/476/0000/5d52723a26786.jpg"],
        "7": ["https://gdz-ru.com/attachments/images/tasks/000/049/476/0002/5d5270d21b692.jpg", "https://gdz-ru.com/attachments/images/tasks/000/049/476/0000/5d52723a268ce.jpg"],
        "8": ["https://gdz-ru.com/attachments/images/tasks/000/049/476/0002/5d5270d21b7f4.jpg", "https://gdz-ru.com/attachments/images/tasks/000/049/476/0000/5d52723a26a3e.jpg"],
        "9": ["https://gdz-ru.com/attachments/images/tasks/000/049/476/0002/5d5270d21b94d.jpg", "https://gdz-ru.com/attachments/images/tasks/000/049/476/0000/5d52723a26b50.jpg"],
        "10": ["https://gdz-ru.com/attachments/images/tasks/000/049/476/0002/5d5270d21ab6c.jpg", "https://gdz-ru.com/attachments/images/tasks/000/049/476/0000/5d52723a25ee8.jpg"]
      },
      "§ 2. Предмет химии. Вещества": {
        "1": ["https://gdz-ru.com/attachments/images/tasks/000/049/476/0002/5d5270d21baaa.jpg", "https://gdz-ru.com/attachments/images/tasks/000/049/476/0000/5d52723a26c5a.jpg"],
        "2": ["https://gdz-ru.com/attachments/images/tasks/000/049/476/0002/5d5270d21bf0a.jpg", "https://gdz-ru.com/attachments/images/tasks/000/049/476/0000/5d52723a26dbf.jpg"],
        "3": ["https://gdz-ru.com/attachments/images/tasks/000/049/476/0002/5d5270d21c0cc.jpg", "https://gdz-ru.com/attachments/images/tasks/000/049/476/0000/5d52723a26f03.jpg"],
        "4": ["https://gdz-ru.com/attachments/images/tasks/000/049/476/0002/5d5270d21c245.jpg", "https://gdz-ru.com/attachments/images/tasks/000/049/476/0000/5d52723a27078.jpg"],
        "5": ["https://gdz-ru.com/attachments/images/tasks/000/049/476/0002/5d5270d21c3d9.jpg", "https://gdz-ru.com/attachments/images/tasks/000/049/476/0000/5d52723a271a2.jpg"],
        "6": ["https://gdz-ru.com/attachments/images/tasks/000/049/476/0002/5d5270d21c57d.jpg"],
        "7": ["https://gdz-ru.com/attachments/images/tasks/000/049/476/0002/5d5270d21c709.jpg"],
        "8": ["https://gdz-ru.com/attachments/images/tasks/000/049/476/0002/5d5270d21c8bb.jpg"],
        "9": ["https://gdz-ru.com/attachments/images/tasks/000/049/476/0002/5d5270d21ca56.jpg"],
        "10": ["https://gdz-ru.com/attachments/images/tasks/000/049/476/0002/5d5270d21bcd6.jpg"]
      }}

I need to output it in the format:

спойлер{
      спойлер{
        номер
      }
}

but how to do it in php?
there is another option:
json:

"tasks": {
    "Тема 1 (задания)": {
      "1": ["https://gdz-ru.com/attachments/images/tasks/000/050/046/0000/5d49321a57348.jpg"],
      "2": ["https://gdz-ru.com/attachments/images/tasks/000/050/046/0000/5d49321a714a7.jpg"],
      "3": ["https://gdz-ru.com/attachments/images/tasks/000/050/046/0000/5d49321a7162f.jpg"],
      "4": ["https://gdz-ru.com/attachments/images/tasks/000/050/046/0000/5d49321a717d2.jpg"],
      "5": ["https://gdz-ru.com/attachments/images/tasks/000/050/046/0000/5d49321a71963.jpg"],
      "6": ["https://gdz-ru.com/attachments/images/tasks/000/050/046/0000/5d49321a71b9c.jpg"],
      "7": ["https://gdz-ru.com/attachments/images/tasks/000/050/046/0000/5d49321a71ce3.jpg"],
      "8": ["https://gdz-ru.com/attachments/images/tasks/000/050/046/0000/5d49321a71e5f.jpg"],
      "9": ["https://gdz-ru.com/attachments/images/tasks/000/050/046/0000/5d49321a71fd4.jpg"],
      "10": ["https://gdz-ru.com/attachments/images/tasks/000/050/046/0000/5d49321a6f0da.jpg", "https://gdz-ru.com/attachments/images/tasks/000/050/046/0000/5d49321a6f372.jpg"],
      "11": ["https://gdz-ru.com/attachments/images/tasks/000/050/046/0000/5d49321a6f5db.jpg"],
      "12": ["https://gdz-ru.com/attachments/images/tasks/000/050/046/0000/5d49321a6f885.jpg"],
      "13": ["https://gdz-ru.com/attachments/images/tasks/000/050/046/0000/5d49321a6fad3.jpg"],
      "14": ["https://gdz-ru.com/attachments/images/tasks/000/050/046/0000/5d49321a6fd21.jpg"],
      "15": ["https://gdz-ru.com/attachments/images/tasks/000/050/046/0000/5d49321a70147.jpg"],
      "16": ["https://gdz-ru.com/attachments/images/tasks/000/050/046/0000/5d49321a7039c.jpg"],
      "17": ["https://gdz-ru.com/attachments/images/tasks/000/050/046/0000/5d49321a70750.jpg"],
      "18": ["https://gdz-ru.com/attachments/images/tasks/000/050/046/0000/5d49321a709ba.jpg", "https://gdz-ru.com/attachments/images/tasks/000/050/046/0000/5d49321a70f76.jpg"]
    }}

I took it out like this:

foreach ($json[tasks] as $key => $part) { ?>
          <div class="spoiler">
            <div class="spoiler-head"><?php echo $key?></div>
            <div class="spoiler-body book-content" id="<?php echo $key?>">
              <?php 
              foreach($part as $task => $link) {
                echo ('<a>'.$task.'</a>');
              }?>
            </div>
          </div>	
        <?php } ?>

Answer 1

What's the question?