PHP pagination code (simple and easy to use)

;
function pager($rows,$page_size){
global $page,$select_from,$select_limit,$pagenav;
$page_count = ceil($rows/$page_size);
if($page <= 1 || $page == '') $page = 1;
if($page >= $page_count) $page = $page_count;
$select_limit = $page_size;
$select_from = ($page - 1) * $page_size.',';
$pre_page = ($page == 1)? 1 : $page - 1;
$next_page= ($page == $page_count)? $page_count : $page + 1 ;
$pagenav .= "The $page/$page_count page&nbsp;Total $rows records&nbsp;";
$pagenav .= "<a href='?page=1'>Home</a>&nbsp;";
$pagenav .= "<a href='?page=$pre_page'>Previous page</a>&nbsp;";
$pagenav .= "<a href='?page=$next_page'>Last page</a>&nbsp;";
$pagenav .= "<a href='?page=$page_count'>last page</a>";
$pagenav.="　Skip to <select name='topage' size='1' onchange='=\"?page=\"+'>\n";
for($i=1;$i<=$page_count;$i++){
if($i==$page) $pagenav.="<option value='$i' selected>$i</option>\n";
else $pagenav.="<option value='$i'>$i</option>\n";
}
}
// Use example
if (!$conn= mysql_connect("localhost", "root" ,"root")) die('Database selection failed!');
if (!mysql_select_db("test", $conn)) die('Database selection failed!');
mysql_query('set names GBK');
///////////////////////////////////////// Use the pager function to calculate which record to search $select_from, $pagenav output page navigation
$rows = mysql_num_rows(mysql_query("select * from test"));
pager($rows,2);
$sql = "select * from test limit $select_from $select_limit";
$rst = mysql_query($sql);
while ($row = mysql_fetch_array($rst)){
echo "$row[id] - $row[sex] - $row[name] <hr />";
}
echo $pagenav;
?>
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