php ajax pagination four_PHP tutorial

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The most important thing is the result.php file of php,:

//A series of queries from the database will not be described here... You can know it by referring to the following
//PHP server
/*
PHP paging function
function Ajaxpage($sql,$num){
global $db;
$pageno=$_GET['pageno '];
$pageno=(int)$pageno;
if(empty($pageno)||$pageno<1) $pageno=1;
$result=$db->query( $sql);
$number=$db->num_rows($result);
$totalpage=(int)ceil($number/$num);
if($pageno>=$totalpage ){$pageno=$totalpage;}
$start_rowno=($pageno-1)*$num;
$query=$sql." LIMIT ".$start_rowno.",".$num;
$result=$db->query($query);
return array('result'=>$result,'page'=>array('pageno'=>$pageno,'totalpage' =>$totalpage,'number'=>$number));
}

$sql="select * from guest";//Query SQL statement
$num=2; //Paging control, display 2 records per page
$return=Ajaxpage($sql,$num);
while($row=$db->fetch_assoc($return['result'])) {
$result[]=$row; //You can use PHP to process the data here, but I won’t give an example here
}
$result=array('result'=>$result,'page '=>$return['page']);
include('json.class.php');//Include JSON class file
$json=& new Json();
$result =$json->encode($result);//JSON
echo $result;
*/
//If the pageno parameter is sent through AJAX and the resource obtained from the database is $str after JSON Like this, output directly and let JS process it.
//If you don’t understand anything, you can ask me
if(ob_get_length()) ob_clean();
header('cache-control:no-cache ,must-revalidate');
header('pragma:no-cache');
if($_GET['pageno']==1)
$str='{"result":[ {"id":"99","name":"technology","qq":"","tel":"","email":"","content":"[emot:0]", "time":"1198522490","ip":"127.0.0.1",

"rcontent":null,"rtime":"0","url":"0 ","img":"app/index/image/show/1.gif"},{"id":"100","name":"Test","qq":"","tel":" ","email":"","content":"[emot:9]","time":1198548687","ip":"127.0.0.1","

rcontent":null,"rtime":"0","url":"0","img":"app/index/image/show/4.gif"}],"page":{"pageno" :1,"totalpage":2,"number":2}}';
else
$str='{"result":[{"id":"101","name":"Ah ","qq":"","tel":"","email":"","content":"[emot:8][emot:1]","time":"1198548716","ip ":"127.0.0.1","rcontent":null,"rtime":"0","url":"0","img":

"app/index /image/show/9.gif"}],"page":{"pageno":2,"totalpage":2,"number":3}}';

echo iconv('gb2312' ,'utf-8',$str);
?>