world-game/site/templates/blog.json.php

<?php

$specificData = [
  'intro' => [
    'title' => $page->introTitle()->value(),
    'text' => $page->introText()->value()
  ],
  'articles' => $page->children()->listed()->sortBy('date', 'desc')->map(function($article) {
    return [
      'title' => $article->title()->value(),
      'slug' => $article->slug(),
      'url' => $article->url(),
      'date' => $article->date()->toDate('Y-m-d'),
      'dateFormatted' => $article->date()->toDate('d/m/Y'),
      'intro' => $article->intro()->excerpt(200),
      'cover' => $article->cover()->toFile()?->url(),
      'authorName' => $article->authorName()->value(),
      'authorPhoto' => $article->authorPhoto()->toFile()?->url()
    ];
  })->values()
];

$pageData = array_merge($genericData, $specificData);

header('Content-Type: application/json');
echo json_encode($pageData);