Yii2.0框架behaviors方法使用实例分析

use yii\filters\AccessControl;
use yii\filters\VerbFilter;

public function behaviors(){
  return [
    'access' => [
      'class' => AccessControl::className(),
      'only' => ['index', 'create', 'update'],
      'rules' => [
        // 允许认证用户
        [
          'allow' => true,
          'roles' => ['@'],
        ],
        // 默认禁止其他用户
      ],    
    ],
    'verbs' => [
      'class' => VerbFilter:: className(),
      'actions' => [
         'index' => [ 'get'],      //只允许get方式访问
         'create' => [ 'post'],     //只允许用post方式访问
         'update' => [ 'post']
       ],
    ],
  ];
}

'components' => [
    'user' => [
      'identityClass' => 'backend\system\core\UserIdentity',
      'enableAutoLogin' => true,
      'loginUrl' => ['login/login']   //此处设置默认登录页，如果未登录就会跳转到该页
    ],
    ...

$userid=Yii::$app->user->getId();  //获取用户id

public function behaviors()
{
    return [
      'access' => [
        'class' => AccessControl::className(),
        'only' => ['logout', 'signup', 'change-password'],
        'rules' => [
          [
            'actions' => ['signup'], //允许游客注册
            'allow' => true,
            'roles' => ['?'],
          ],
          [
            'actions' => ['logout', 'change-password'],
            'allow' => true,     //允许用户登出、修改密码
            'roles' => ['@'],
          ],
        ],
      ],
      'verbs' => [
        'class' => VerbFilter::className(),
        'actions' => [
          'logout' => ['post'],    //登出只允许提交方式为post,否则报错
        ],
      ],
    ];
}