1.  <?php
   2. class PostsController extends AppController {
   3. ...
   4. function index() {
   5. $posts = $this->paginate();
   6. if (isset($this->params['requested'])) {
   7. return $posts;
   8. } else {
   9. $this->set(compact('posts'));
  10. }
  11. }
  12. }
  13. ?>


those codes are from 3.9.3 Elements part of the doc,some Q:
A)  $posts = $this->paginate(); ----    posts is view or action?
paginate() is a method of PostsController?
B)$this->params['requested']---- mean?
C)return $posts---posts is the view?
D)$this->set(compact('posts'));----mean?
 what kind of method compacts() is ?
posts is the view?

thx
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