Aset

<?php 
  public function getPortfolio($catergory = null) {
     
       if(is_null($catergory )) {
          // default portfolio
           $portfolio = Portfolio:all();
        } else {
           // many portfolio
           $portfolio = Portfolio::where("catergory", $catergory )->get();
        }
           return view("portfolio", compact('portfolio'));
  }
?>