html extension with php

[coper]

Hello
I'm trying to run html extension files with php code inside it. I can do it adding this lines to the htaccess file

Code:

AddType application/x-httpd-php .php .htm .html
AddHandler x-httpd-php .php .htm .html

But with this the output of a mysql query is empty or there is nothing printing in the page. Using the same file with the mysql query but changing the extension of the file to php I can see the output line of the query without problem, so the query is ok.
Now I want to try to add this lines to the apache config

Code:

<IfModule mod_mime.c>
AddType application/x-httpd-php .php
AddType application/x-httpd-php .phtml
AddType application/x-httpd-php .php3
AddType application/x-httpd-php .php4
AddType application/x-httpd-php .html
AddType application/x-httpd-php-source .phps
</IfModule>

But I don't know in which config file I need to add it. Can you tell me that?
And if you had the same problem with the html extension and php code please tell me too.

Thanks for your help.

Greetings.

c.