Change shuffle array to algoritym

hi
i found an algorithm http://www.webmastersherpa.com/content/useful-code/32/ Which i want to use on my rss feed merger instead of the shuffle which is in the code extract bellow, how do i do this?

shuffle($all);
foreach($all as $j=>$k) {
if(!trim($k['title'])||!trim($k['link']))
unset($all[$j]);
}

return $all;
}

how can i make this work with the algorithm?

Thanks