Retrieve serialize value from database in laravel

I am creating referral system . Every thing is ok, but I am unable to retrieve serialize value from database. Here is my middle-ware code.

 public function handle($request, Closure $next)
    {
       $response = $next($request);

// Check that there is not already a cookie set and that we have 'ref' in the url
if (! $request->hasCookie('referral') && $request->query('ref') ) {
  // Add a cookie to the response that lasts 5 years (in minutes)
  $response->cookie( 'referral', encrypt( $request->query('ref') ), 525600 );
}
 else {
            if( $request->query('ref') ) {
                return redirect($request->fullUrl())->withCookie(cookie()->forever('referral', $request->query('ref')));
            }
        }

return $response;
    }
}

Here Is my register Code . $referred_by = Cookie::get('referral'); line is returning like s:1:"1"; And these value saved in databases.

protected function create(array $data)
    {
        $referred_by = Cookie::get('referral');
        return User::create([
            'name' => $data['name'],
            'email' => $data['email'],
            'password' => Hash::make($data['password']),
            'referred_by' => $referred_by,
        ]);

    }

Now I am trying to retrieve this for view .but Unable to decode this value. s:1:"1";

Any help.

via Chebli Mohamed