The difference between yii1 and yii2

1. Quickly distinguish yii1 and yii2

yii1:

Yii::app()

yii2:

Yii::$app

2. When the controller is called Difference

For example: the controller file name is UserGroupController.php

The function is actionIndex

(recommended tutorial: yii framework)

yii1:

index.php?r=userGroup/index&page=1

yii2:

index.php?r=user-group/index&page=1

The directory under the corresponding view is also similar. It needs to be named user-group.

3. Use the database

For example, query a record with user_id

yii1:

User::model()->find('user_id=:user_id',[':user_id'=>$user_id]);

yii2:

User::find()->where('user_id=:user_id',[':user_id'=>$user_id])->one();

Query many Records:

yii1:

User::model()->findAll('status=:status',[':staus'=>$status]);

yii2:

User::find()->where('status=:status',[':staus'=>$status])->all();

In addition, yii2 also provides the asArray() method, and the direct query result is an array:

User::find()->where('status=:status',[':staus'=>$status])->asArray()->all();

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