/** * The hidden form fields that store a JSON representation of the categories * for an article. */ public function editPageMetadata() { $categories = ''; $data = CategoryHelper::getExtractedCategoryData(); if (isset($data) && !empty($data['categories'])) { $categories = htmlspecialchars(CategoryHelper::changeFormat($data['categories'], 'array', 'json')); } $this->response->setVal('categories', $categories); }