if ($_FILES["portfolioImage"]["size"] > 500000) {
            echo "{\"success\":false}";
            $uploadOk = 0;
        }
        // Allow certain file formats
        if ($imageFileType != "jpg" && $imageFileType != "png" && $imageFileType != "jpeg" && $imageFileType != "gif") {
            echo "{\"success\":false}";
            $uploadOk = 0;
        }
        // Check if $uploadOk is set to 0 by an error
        if ($uploadOk == 0) {
            echo "{\"success\":false}";
            // if everything is ok, try to upload file
        } else {
            if (move_uploaded_file($_FILES["portfolioImage"]["tmp_name"], $target_file)) {
                try {
                    $portfolio->image = $target_file;
                    PortfolioDAO::addPortfolio($portfolio);
                    redirect_to("ManagePortfolio.php");
                    //echo "{\"success\":true}";
                } catch (Exception $e) {
                    echo "{\"success\":false}";
                }
            } else {
                echo "{\"success\":false}";
            }
        }
    } catch (Exception $exception) {
        echo "{\"success\":false}";
    }
}