为什么它绕过返回Redirect :: to（）？

If $id does not match to $sessionPackage['id'] it should execute

 return Redirect::to('/order/' . $id . '/details');

For some reason it does redirect to a page, however it does output "Test" as debugging, so it mean that if condition is working.

In the controller:

public function showDetails($id)
{


    if (!$this->checkPackage($id)) {
        return Redirect::to('/');
    }

    $data = SessionOrder::getPersonalDetails();

    return View::make("order.order-details")->withData($data);
}

checkPackage() function:

protected function checkPackage($id)
{

    $this->package = Packages::getPackage($id);

    if (!$this->package) {
        return false;
    }

    $sessionPackage = SessionOrder::getPackage();

    if (SessionOrder::hasPackage() && $sessionPackage['id'] != $id) {

        SessionOrder::clearPackageExceptPersonalDetails();

        SessionOrder::storePackage([
            'id' => $id
        ]);

        echo "Test";

        return Redirect::to('/order/' . $id . '/details');
    }

    return true;
}

Update: If package ID does not exist then it would redirect return Redirect::to('/'); but if package ID does exist and it does not match to $sessionPackage['id'] it should redirect to Redirect::to('/order/' . $id . '/details');

Instead of the redirection, you need to return false, and do the redirection in an else-clausule in your showDetails method.

Laravel route doesn't support cascade routing. So you have to redirect in your showDetail funciton, not in the child funciton checkPackage().