Another PHP paging class implementation code

<?php 
function genpage(&$sql,$page_size=10) 
{ 
global $pages,$sums,$eachpage,$page; //Total pages, total records, per page, current page
$page = $_GET["page"]; 
if($page ==0)$page =1; 
$eachpage = $page_size; 
$pagesql = strstr($sql," from "); 
$pagesql = "select count(*) as ids ".$pagesql; 
$conn = mysql_query($pagesql) or die(mysql_error()); 
if($rs = mysql_fetch_array($conn))$sums = $rs[0]; 
$pages=ceil($sums/$eachpage); 
if($pages==0)$pages=1; 
$startpos = ($page-1)*$eachpage; 
$sql .=" limit $startpos,$eachpage "; 
} 

//According to the paging
function showpage() 
{ 
global $pages,$sums,$eachpage,$page; //Total pages, total records, per page, current page, other parameters
$link=$_SERVER['PHP_SELF']; 
echo " record ".$sums.":".$eachpage."　"; 
echo " Number of pages ".$page."/".$pages."　"; 
$p_head=$page-5; 
if($p_head<=0)$p_head=1; //The page number cycle begins with the first five
$p_end=$page+5; 
if($p_end>$pages)$p_end=$pages; //5 after the end of the page number cycle
echo "[<a href=$link?page=1> Home page </a>] "; 
for($i=$p_head;$i<=$p_end;$i++) 
{ 
if($i!=$page) 
echo "<a href=$link?page=$i>[$i]</a> "; 
else 
echo "<b><strike>[$i]</strike></b> "; 
} 
echo " [<a href=$link?page=$pages> At the end of the page </a>]"; 
} 
?>