Markdown::getCategoryById PHP Method

    public function getCategoryById($categoryId)
    {
        $cacheKey = "getCategoryById_" . $categoryId . ".gb";
        $categoryObj = $this->gbReadCache($cacheKey);
        if ($categoryObj === false) {
            foreach ($this->categorys as $idx => $category) {
                if ($category['id'] == $categoryId) {
                    $categoryObj = $category;
                    $this->gbWriteCache($cacheKey, $categoryObj);
                    break;
                }
            }
        }
        return $categoryObj;
    }