Edit user info without change password if password field empty and edit it if we fill it with match confirm

I am using lareavel 5, and I want to create a from for updating user info

my form has 4 fields
name, email, password and confirm password

validation rule on name required, email valid and required, and password required, min:6 chars and match with confirm.

everything for now is ok.

what I want to do is:

when user fill password then confirm field should be filled and matched. but if user does not fill password the submit will pass and no validation error and update user info without change password.

validation code:

  $user = Input::all();

    if (trim($user['password']) != "") {
        $rules = array(
            'name' => 'required|max:255',
            'email' => 'required|email|max:255|unique:users,email,' . $id,
            'password' => 'required|confirmed|min:6',   
            );
    }
    else{
         $rules = array(
            'name' => 'required|max:255',
            'email' => 'required|email|max:255|unique:users,email,' . $id,  
            );
    }

update user info code:

$user = User::findOrFail($id);

        $user->name = $data['name'];
        $user->email = $data['email'];


        if (trim($data['password']) != "") {
            $user->password = bcrypt($data['password']);
        }

        $user->save();

any other best solution that I used.