How to echo php-code in php
You can include the file via include ($path_to_file); Then the php code will be executed. This will be so even if the file ends with ".txt".
If you want to output the code itself you have to use this:
$code = nl2br (htmlspecialchars(file_get_contents("$path_to_file")));
htmlspecialchars is a special function because it converts all angle brackets into entities. For example
headerwill be converted to <h1>header</h1>
Be careful not to grant access to php-files containing passwords. On "include" see this.
To see how php handles nl2br you have to look at the source by clicking "sneak peak", but you also have to
open it directly in the browser to see what the php code acually does:
I entered it into the editor like this:
this is a text with
Sneak peek of the server side code