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Comment by ryanlm | Hacker News Reader

No, but another one you can do it in is PHP and JavaScript

    function isEven($number) {
        return $number % 2 == 0;
    }

That's actually valid PHP code and JavaScript. But I think you'll need to use eval on that in the PHP vm because it won't have the `<?php`

You can use the same trick used here of hiding the PHP tags behind the comments /*<?php

Actually that trick creates some residual garbage (the slash and the asterisk would be printed in PHP)

A way to avoid this is to use the HTML comment notation, JavaScript just ignores it (until end of line), so just:

    <!-- <?php echo "-->";