PHP 学习 分页类

<?php
header("Content-Type:text/html;charset=utf-8");
include "page.class.php";

$link=mysql_connect("localhost", "root", "123456");

mysql_select_db("xsphpdb");

$result=mysql_query("select * from shops");

$total=mysql_num_rows($result);

$num=5;

$page=new Page($total, $num, "&cid=99");

$sql="select * from shops {$page->limit}";

$result=mysql_query($sql);

echo '<table align="center" border="1" width="960">';
echo '<caption><h1>SHOPS</h1></caption>';

while($row=mysql_fetch_assoc($result)){
echo '<tr>';
echo '<td>'.$row["id"].'</td>';
echo '<td>'.$row["name"].'</td>';
echo '<td>'.$row["price"].'</td>';
echo '<td>'.$row["num"].'</td>';
echo '<td>'.$row["desn"].'</td>';
echo '</tr>';

}

echo '<tr><td colspan="5" align="right">'.$page->fpage(array(8,3,4,5,6,7,0,1,2)).'</td></tr>';
echo '</table>';

===========================================

<?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'=>"个记录", "prev"=>"上一页", "next"=>"下一页", "first"=>"首 页", "last"=>"尾 页");
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;
echo $url;
$parse=parse_url($url);

if(isset($parse["query"])){
parse_str($parse['query'],$params);
unset($params["page"]);
$url=$parse['path'].'?'.http_build_query($params);

}

return $url;
}

private 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
$html.="  <a href='{$this->uri}&page=1'>{$this->config["first"]}</a>  ";

return $html;
}

private function prev(){
if($this->page==1)
$html.='';
else
$html.="  <a href='{$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;

$linkPage.=" <a href='{$this->uri}&page={$page}'>{$page}</a> ";

}

$linkPage.=" {$this->page} ";

for($i=1; $i<=$inum; $i++){
$page=$this->page+$i;
if($page<=$this->pageNum)
$linkPage.=" <a href='{$this->uri}&page={$page}'>{$page}</a> ";
else
break;
}

return $linkPage;
}

private function next(){
if($this->page==$this->pageNum)
$html.='';
else
$html.="  <a href='{$this->uri}&page=".($this->page+1)."'>{$this->config["next"]}</a>  ";

return $html;
}

private function last(){
if($this->page==$this->pageNum)
$html.='';
else
$html.="  <a href='{$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;location=\''.$this->uri.'&page=\'+page+\'\'}" value="'.$this->page.'"
style="width:25px"><input type="button" value="GO" onclick="javascript:var page=(this.previousSibling.value>'.$this->pageNum.')?'.$this->pageNum.':this.previousSibling.value;location=\''.$this->uri.'&page=\'+page+\'\'">  ';
}
function fpage($display=array(0,1,2,3,4,5,6,7,8)){
$html[0]="  共有<b>{$this->total}</b>{$this->config["header"]}  ";
$html[1]="  每页显示<b>".($this->end()-$this->start()+1)."</b>条，本页<b>{$this->start()}-{$this->end()}</b>条  ";
$html[2]="  <b>{$this->page}/{$this->pageNum}</b>页  ";

$html[3]=$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;

}

}