Question: I have a quick question about changing the file types PHP parses. [This](http://www.tuxradar.com/practicalphp/17/1/2) website gave this line:

```
AddType application/x-httpd-php .php

```

But I'm not clear what file this goes into. Any help would be appreciated - thanks!

Answer: 
That line goes into a file called `.htaccess`, that changes the Apache server configuration for the folder it is on, and all its subfolders (Unless otherwise specified)

Your server should parse php files with the *.php* file extension by default though. You could use that to add custom file formats for example.

To parse .mp4 files, like you said in the comments, add to your .htaccess:

```
AddType application/x-httpd-php .mp4

```
That makes Apache parse `.php` files through the PHP interpreter.

You can either add that to your `.htaccess` or `httpd.conf` file, depending on what you have access to.