Step 8: Implement the 'create post' feature.

8. Implement the create post feature. For this:
   1. Create the controllers\posts directory and move controllers\posts.php to constrollers\posts\index.php. Correct all necessary links.
   2. Create the views\posts directory and move views\posts.php to views\posts\index.php. Correct all necessary links.
   3. Create both controllers\posts\create.php and views\posts\create.php.
   4. Add '/posts/create' => BASE_PATH . '/controllers/posts/create.php' to the $routes in public\index.php.
   5. In views\posts\create.php, insert a HTML form with these fields:
      1. title as simple input field,
      2. categories[] as multiple select box,
      3. and body as textarea. You may use a rich text editor like TinyMCE.
      4. You may add jQuery Validation to it.
      5. Add method="post" action="/posts/save" to the <form> tag.
      6. Add '/posts/save' => BASE_PATH . '/controllers/posts/store.php' to the $routes.
   6. In functions.php, write a saveData($key, $newEntry) function:
      1. load the corresponding JSON file with loadData(key)
      2. add the $newEntry to $data[]
      3. save the updated JSON file.
   7. Implement controllers\posts\store.php:
      1. create a new Post with the fields submitted in the form:
         
         $newPost = new Post($_POST['title'], $_POST['body'], 1, $_POST['categories']);
      2. save that post: saveData('posts', $newPost);
      3. redirect to the posts overview page: header("location: /posts");