for ($i=0, $n=$i<count($files); $i<$n; $i++) {
    $num = $files[$i];
    echo '<a href="/var/www/html/Books/Magazines/The Matrix Comics/A Life Less Empty/'.$num.'" target="_blank">'
        .'<img src="'.$num.'" alt="random image">'
        .'</a>&nbsp;&nbsp;';
}