php面向對象分頁類代碼

<?php
//自定義分頁類
class Page
{
public $page=1; //當前頁
public $pageSize=5; //頁大小
public $maxPage=0; //最大頁數
public $maxRows=0; //最大數據條
public $url =null; //訪問的url地址
public $params=null; //url的參數條件
public function __construct($maxRows,$pageSize=5){
$this->maxRows = $maxRows;
$this->pageSize= $pageSize;
//獲取當前頁
$this->page = isset($_GET['p'])?$_GET['p']:1;
$this->getMaxPage();
$this->checkPage();
//獲取和封裝url地址
$this->url = $_SERVER["PHP_SELF"];
$this->getParams();
}
//獲取分頁信息
public function limit(){
return (($this->page-1)*$this->pageSize).",".$this->pageSize;
}
//計算分頁中的最大頁數
private function getMaxPage(){
$this->maxPage = ceil($this->maxRows/$this->pageSize);
}
//判斷當前頁數是否越界
private function checkPage(){
if($this->page>$this->maxPage){
$this->page = $this->maxPage;
}
if($this->page<1){
$this->page=1;
}
}
//封裝url上搜索條件
private function getParams(){
foreach($_GET as $k=>$v){
if($k!="p" && !empty($v)){
$this->params.="&{$k}={$v}";
}
}
}
//生成分頁HTML代碼
public function show(){
$str = "";
$str.= "當前第{$this->page}/{$this->maxPage}頁 共計{$this->maxRows}條 ";
$str.= " <a href='{$this->url}?p=1{$this->params}'>首頁</a> ";
$str.= " <a href='{$this->url}?p=".($this->page-1)."{$this->params}'>上一頁</a> ";
$str.= " <a href='{$this->url}?p=".($this->page+1)."{$this->params}'>下一頁</a> ";
$str.= " <a href='{$this->url}?p={$this->maxPage}{$this->params}'>末頁</a> ";
return $str;
}
}