base\Event $sender

$sender public property

The sender of this event. If not set, this property will be set as the object whose trigger() method is called. This property may also be a null when this event is a class-level event which is triggered in a static context.

public object $sender = null

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http://www.yiiframework.com/doc-2.0/yii-base-event.html#$sender-detail

doc_Yii

2016-10-30 16:51:37

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