Wordpress related question about printf

Posted by Denny Mueller on Pro Webmasters See other posts from Pro Webmasters or by Denny Mueller
Published on 2012-07-02T14:56:39Z Indexed on 2012/07/02 15:24 UTC
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php

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Wordpress

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template

Today i work through a theme to get a better understanding of wordpress and templating. I discovered this

<?php printf( __('Designed by %s', 'Anyword'), '<a href="http://www.blub.tld" target="_blank">Blub</a>', '' ); ?>

I know it shows "Designed by Blub" (Where Blub is linked) But what does the __ mean or why is there a string insert? What for is the Anyword?

Can someone exactly explain this line for me?

thanks in advance best regards

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