PHP+Mysql display data and split on pages

[ayaya]

I have 10 rows of data in mysql, i want to display 5 rows of data per page in PHP. I can display 5 rows in page 1, but the page 0 (precedent page), and next page (page 2), don't work. Can anyone help me? This is my code:

<?php
include ("conn.php");

$pagesize=5;
$url=$_SERVER["REQUEST_URI"];
$url=parse_url($url);
$url=$url['path']; 

$numq=mysql_query("select * from `test`");
$num=mysql_num_rows($numq);

$page='';
$pageval=0;
if(isset($_GET['page'])){
 $pageval=$_GET['page'];
 $page=($pageval-1)*$pagesize;
 $page.=',';
}

if($num > $pagesize){
 if($pageval<=1)$pageval=1;
 echo "$num in total".
 " <a href=$url?page=".($pageval-1).">Page precedent</a> <a href=$url?page=".($pageval+1).">Next page</a>";
}

$sql="select * from `test` limit $page $pagesize";
$query=mysql_query($sql);

while($row=mysql_fetch_array($query)){
 echo "<hr><b>".$row['name']." | ".$row['sex'];
}

?>

[ayaya]

come to update...

 

for the above code, my url is: http://localhost/bbs2/list.php

if i add ?page=2 behind the url, that means: http://localhost/bbs2/list.php?page=2

it works, it can show the next 5 rows of data.

but only if i click the Next page on the page list.php, it doesn't work, it shows an alert page "This program cannot display the webpage.. " and if my mouse just rolls over on the text Next page, it can shows the right url on the bottom of firefox. so why it doesn't work when I click?

 

I was stuck on this problem since two days, can anyone help me? thanks a lot!