PHP分页类
<?php
/**
* 分页类
* @author LiZeQiao <674531003@qq.com>
* @version
*/
class Page {
//分页的相关属性
private $total; //数据表中总记录数
private $listRows; //每页显示行数
private $limit; //限制获取记录条数
private $uri; //自动获取url的请求地址
private $pageNum; //总页数
private $page; //当前页
private $config=array(‘header’=>”个记录”, “prev”=>”上一页”, “next”=>”下一页”, “first”=>”首 页”, “last”=>”尾 页”); //分页信息中显示的内容
private $listNum=8; //默认分页显示的系数
//构造方法
public function __construct($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();
}
//设置返回数据返回条数
private function setLimit(){
return “Limit “.($this->page-1)*$this->listRows.”, {$this->listRows}”;
}
//获取当前url的请求地址
private function getUri($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 $url;
}
//获取私有成员属性
private function __get($args){
if($args==”limit”)
return $this->limit;
else
return null;
}
//获取当前页开始的记录数
private function start(){
if($this->total==0)
return 0;
else
return ($this->page-1)*$this->listRows+1;
}
//获取当前页结束的记录数
private function end(){
return min($this->page*$this->listRows,$this->total);
}
//获取上一页和首页的操作数
private function first(){
if($this->page==1)
$html.=”;
else
$html.=” <a href=’{$this->uri}&page=1′>{$this->config["first"]}</a> ”;
return $html;
}
//上一页
private function prev(){
if($this->page==1)
$html.=”;
else
$html.=” <a href=’{$this->uri}&page=”.($this->page-1).”‘>{$this->config["prev"]}</a> ”;
return $html;
}
//获取页数列表信息
private function pageList(){
$linkPage=””;
$inum=floor($this->listNum/2);
//当前页前面的列表
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} ”;
//当前页后面的列表
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 $linkPage;
}
//下一页
private function next(){
if($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 $html;
}
//用于显示和处理表单跳转页面
private function goPage(){
return ‘ <input type=”text” onkeydown=”javascript:if(event.keyCode==13){var page=(this.value>’.$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+\’\’”> ’;
}
//按指定格式输出分页
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;
}
}