No use strict easter egg

[hikari-no-yume]

<?php
use strict;

From PHP 5.4 onwards, this produces the following error:

Fatal error: You seem to be trying to use a different language... in /in/WY1Vs on line 3

Yet HHVM produces no error. Perhaps it should have something like "Fatal error: Why not try Hack instead?" ;)

Also, shhh. This is supposed to be seeekrit.

[fredemmott]

I don't think we'll get to this any time soon; we'd appreciate it if you'd send a pull request :)

[hikari-no-yume]

I may get round to that at some point.