https://learn.microsoft.com/en-us/dotnet/api/system.web.httpresponse.clearheaders?view=netframework-4.8.1
HttpResponse.ClearHeaders Method (System.Web) | Microsoft Learn
Clears all headers from the buffer stream.
system webhttpresponsemethodmicrosoftlearn
https://www.php.net/manual/zh/eventhttprequest.clearheaders.php
PHP: EventHttpRequest::clearHeaders - Manual
Removes all output headers from the header list of the request
phpmanual