Where does the response come from?

A

Alexander Stepanov2018-04-04 12:22:35

Yii

Alexander Stepanov, 2018-04-04 12:22:35

For no reason, one page turns into a tag that comes from nowhere.
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html>
This is the nonsense generated at the top of the contact form page.
Why such miracles can occur? And where to dig?

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M

Maxim, 2018-04-04
@Exebeche

> And where to dig?
Maybe in the controller for this page, there is something like:

Yii::$app->response->format = \yii\web\Response::FORMAT_RAW;
 Yii::$app->response->headers->add('Content-Type', 'text/xml');