+----+-----------+------------------+----------+--------------------------------------------------------------+
| id | name  | email   | is_admin | password              |
+----+-----------+------------------+----------+--------------------------------------------------------------+
| 1 | seekerliu | me@seekerliu.com |  1 | $2y$10$RL6r.MwoJd.oOvKRYhUpmeQI6hUpoG/KgGNhA6X5JrRqfVbooCs92 |
+----+-----------+------------------+----------+--------------------------------------------------------------+

public function store (Request $request)
{
 $user = new \App\User;
  
 // 赋值
 $user->name = $request->name;
 $user->email = $request->email;
 $user->password = bcrypt($request->password);
  
 // 新建一个用户
 $user->save();
}

public function store (Request $request)
{
 $user = new \App\User;
  
 // Mass-Assignment 批量赋值
 $data = $request->all(); 
  
 // 新建一个用户
 $user->create($data);
}

class User extend Model
{
 protected $fillable = ['name', 'email', 'password'];
}

class User extend Model
{
 protected $guarded = ['is_admin'];
}