chromium/third_party/blink/web_tests/http/tests/inspector-protocol/emulation/resources/set-accept-ch.php

<?php
header("Accept-CH: Sec-CH-UA, Sec-CH-UA-Arch, Sec-CH-UA-Bitness, Sec-CH-UA-Full-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA-Platform-Version, Sec-CH-UA-Model, Sec-CH-UA-Mobile, Sec-CH-UA-Wow64");
?>
Hello, test.