php学习笔记（三十二）ajax结合pageView类实现页面无刷新请求
<html>
<head>
<title>Ajax无刷新</title>
<script type="text/javascript" src="ajax.js"></script>
</head>
<body>
<div id="fpage">数据加载中……</div>
<hr>
<script type="text/javascript">
var cache=new Array();
function setPage(url){
var obj = document.getElementById("fpage");
if('undefined'==typeof(cache[url])){
var ajax = Ajax();
ajax.get(url,function(data){
obj.innerHTML=data;
cache[url]=data;
});
}else{
obj.innerHTML=cache[url];
}
}
setPage("demo.php?page=1");
</script>
<script type="text/javascript">
document.write(new Date()+"<br>");
</script>
</body>
</html>
demo.php
<?php
header("Content-Type:text/html;charset=utf-8");
require 'page.class.php';
$mysqli = new mysqli("localhost","root","root","hibernate");
$result = $mysqli->query("select id from users");
$page = new Page($result->num_rows,10);
$sql = "select id,name from users order by id {$page->limit}";
$result = $mysqli->query($sql);
echo '<table align="center" border="1" width=400>';
echo '<tr><th>id</th><th>name</th></tr>';
while ($row = $result->fetch_assoc()){
echo "<tr>";
foreach ($row as $col){
echo "<td>".$col."</td>";
}
echo "</tr>";
}
echo '<tr><td align="right" colspan="2">'.$page->fpage().'</td></tr>';
echo '</table>';
?>
page.class.php
<?php
class Page {
private $total; //数据表中总记录数
private $listRows; //每页显示行数
private $limit;
private $uri;
private $pageNum; //页数
private $config=array('header'=>"records", "prev"=>"prev", "next"=>"next", "first"=>"first", "last"=>"last");
private $listNum=8;
/*
* $total
* $listRows
*/
public function __construct($total, $listRows=10, $pa=""){
$this->total=$total;
$this->listRows=$listRows;
$this->uri=$this->getUri($pa);
$this->page=!empty($_GET["page"]) ? $_GET["page"] : 1;
$this->pageNum=ceil($this->total/$this->listRows);
$this->limit=$this->setLimit();
}
private function setLimit(){
return "Limit ".($this->page-1)*$this->listRows.", {$this->listRows}";
}
private function getUri($pa){
$url=$_SERVER["REQUEST_URI"].(strpos($_SERVER["REQUEST_URI"], '?')?'':"?").$pa;
$parse=parse_url($url);
if(isset($parse["query"])){
parse_str($parse['query'],$params);
unset($params["page"]);
$url=$parse['path'].'?'.http_build_query($params);
}
return $url;
}
function __get($args){
if($args=="limit")
return $this->limit;
else
return null;
}
private function start(){
if($this->total==0)
return 0;
else
return ($this->page-1)*$this->listRows+1;
}
private function end(){
return min($this->page*$this->listRows,$this->total);
}
private function first(){
if($this->page==1)
@$html.='';
else
@$html.="<a href='javascript:setPage(\"{$this->uri}&page=1\")'>{$this->config["first"]}</a>";
return $html;
}
private function prev(){
if($this->page==1)
@$html.='';
else
@$html.="<a href='javascript:setPage(\"{$this->uri}&page=".($this->page-1)."\")'>{$this->config["prev"]}</a>";
return $html;
}
private function pageList(){
$linkPage="";
$inum=floor($this->listNum/2);
for($i=$inum; $i>=1; $i--){
$page=$this->page-$i;
if($page<1)
continue;
$linkPage.="<a href='javascript:setPage(\"{$this->uri}&page={$page}\")'>{$page}</a>";
}
$linkPage.="{$this->page}";
for($i=1; $i<=$inum; $i++){
$page=$this->page+$i;
if($page<=$this->pageNum)
$linkPage.="<a href='javascript:setPage(\"{$this->uri}&page={$page}\")'>{$page}</a>";
else
break;
}
return $linkPage;
}
private function next(){
if($this->page==$this->pageNum)
@$html.='';
else
@$html.="<a href='javascript:setPage(\"{$this->uri}&page=".($this->page+1)."\")'>{$this->config["next"]}</a>";
return $html;
}
private function last(){
if($this->page==$this->pageNum)
@$html.='';
else
@$html.="<a href='javascript:setPage(\"{$this->uri}&page=".($this->pageNum)."\")'>{$this->config["last"]}</a>";
return $html;
}
private function goPage(){
return '<input type="text" onkeydown="javascript:if(event.keyCode==13){var page=(this.value>'.$this->pageNum.')?'.$this->pageNum.':this.value;setPage(\''.$this->uri.'&page=\'+page+\'\')}" value="'.$this->page.'" style="width:25px"><input type="button" value="GO" onclick="javascript:var page=(this.previousSibling.value>'.$this->pageNum.')?'.$this->pageNum.':this.previousSibling.value;setPage(\''.$this->uri.'&page=\'+page+\'\')">';
}
function fpage($display=array(0,1,2,3,4,5,6,7,8)){
$html[0]="total:<b>{$this->total}</b>{$this->config["header"]}";
$html[1]="pageSize:<b>".($this->end()-$this->start()+1)."</b>,currentSize:<b>{$this->start()}-{$this->end()}</b>";
$html[2]="<b>{$this->page}/{$this->pageNum}</b>";
$html[3]=$this->first();
$html[4]=$this->prev();
$html[5]=$this->pageList();
$html[6]=$this->next();
$html[7]=$this->last();
$html[8]=$this->goPage();
$fpage='';
foreach($display as $index){
$fpage.=$html[$index];
}
return $fpage;
}
}