Adding File Delete for CodeIgniter framework

[reverseth]

Actually, this POP chain writes (or replaces the content of) the chosen file with the following content :

<?php return array (
    0 => '',
);

It is also possible to choose a string to write inside the array

<?php return array (
    0 => '<here>',
);

But I did not find a way to execute it.
Thus, I decided to push it as a FD, and not as a FW, for the moment.