YII2 uses JSON and sets the difference between ' format ' and ' Yii\web\response::format_json ' in component

In Yii2, if you set the

' Response ' = [
' Format ' = Yii\web\response::format_json,
' CharSet ' = ' UTF-8 ',
// ...
]，

Represents, the controller output is all JSON format data, that is, JSON string;

And if the use of Json::htmlencode ($price);

First, the use Yii\helpers\json is introduced;

A JSON string can be generated in the current action, and the response object will take this as normal text output

YII2 uses JSON and sets the difference between ' format ' and ' Yii\web\response::format_json ' in component