mod_headers not sending headers when file is parsed with PHP fpm

[Oliver Baran <obaran@xxxxxxxxx>]

Hello,

I have a problem with Apache mod_headers and PHP fpm (fastcgi).

If I write a custom header directly in the vhost configuration it is send to the client, even if the request it is a PHP file. But when I write the header in the directory section of that vhost configuration or in a .htaccess file, the custom header is not send to the client if the requested file is parsed through PHP. If I request a .txt file the header is send to the client. It does not matter if I write `Header always set MyCustomHeader "test"` or `Header set MyCustomHeader "test"`

My Versions:

/usr/sbin/apache2 -v

Server version: Apache/2.2.22 (Debian)

Server built:   Jul 20 2016 05:06:20

/usr/sbin/php5-fpm -v

PHP 5.6.24-1~dotdeb+7.1 (fpm-fcgi) (built: Jul 21 2016 23:28:37)

Copyright (c) 1997-2016 The PHP Group

Zend Engine v2.6.0, Copyright (c) 1998-2016 Zend Technologies

    with Zend OPcache v7.0.6-dev, Copyright (c) 1999-2016, by Zend Technologies

Has someone a idea how to fix this?

Thanks

Oliver