pager adaptor function by num

<?php
function pager_adaptor($cp/*current page*/,$tp/*total page*/,$show=5){
 //ref:http://web-programming-bookmark.blogspot.com/
 if ($cp < 1) $cp=1; if ($cp > $tp) $cp=$tp;
 $fg = $cp%$show == 0 ? $cp-$show+1 : $cp-$cp%$show+1;
 $pat = '<a href="?page=%d" %s>%s</a> ';
 $s= sprintf("$pat $pat $pat",   1,'','[First] ',   $first_of_group-1,'','&lt;&lt; ',   $cp-1,'','&lt; ' );
 for($i=$fg; $i<$fg+$show && $i<=$tp; $i++) $s.= sprintf($pat, $i, $i==$cp ? 'style="font-weight:bold;"' : '', $i);
 $s.= sprintf("$pat $pat $pat",   $cp+1,'','&gt; ',   $i,'','&gt;&gt; ',   $tp,'','[Last]' ); return $s;
}
?>

<style type="text/css">
 .pager a {text-decoration:none;color:navy;}
</style>
<div class="pager"><?php echo pager_adaptor($_GET['page'], 100, 9);?></div>