YII2中beforeSave和TimestampBehavior的使用，自动更新创建时间，更新时间

public function beforeSave($insert)
{
    if (parent::beforeSave($insert)) {
        if ($insert) {
            if ($this->hasAttribute(‘created_at‘)) {
                $this->created_at = time();
            }
        }
        if ($this->hasAttribute(‘updated_at‘)) {
            $this->updated_at = time();
        }
        return true;
    }
    return false;
}

public function behaviors()
{
    return [
        [
            ‘class‘ => TimestampBehavior::className(),
            ‘attributes‘ => [
                ActiveRecord::EVENT_BEFORE_INSERT => [‘created_at‘, ‘updated_at‘],
                ActiveRecord::EVENT_BEFORE_UPDATE => [‘updated_at‘],
            ],
            ‘value‘ => time(),
        ],
    ];
}