PHP完美分页类

<?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;		//自动获取url请求地址
	private $pageNum;	//总页数
	private $config = array('header'=>'条记录','prev'=>'上一页','next'=>'下一页','first'=>'首页','last'=>'尾页');

	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;
	}

	public function getUri($pa){
	    $url = $_SERVER['REQUEST_URI'].(strpos($_SERVER['REQUEST_URI'],'?')?'':"?").$pa;
		$parse = parse_url($url);  //返回一个数组，数组有元素query和path
		if(isset($parse['query'])){
			parse_str($parse['query'],$params); //将query中的参数解析到$params，为数组
			unset($params['page']);
			$url = $parse['path'].'?'.http_build_query($params); //按照指定的参数生成一个请求字符串
		}
		return $url;
	}	 	

	//limit为私有属性，通过这个魔术方法使limit变得可用
	private function __get($args){
		if($args=="limit"){
			return $this->limit;
		}else{
			return null;
		}
	}

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

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

	private function pagelist(){
		$linkPage='';
		//每边显示inum个页码
		$inum = 3;
		//左边的页码
		for($i=$inum;$i>=1;$i--){
			$page = $this->page-$i;
			if($page<1){
				continue;
			}else{
				$linkPage.="&nbsp;<a href='{$this->uri}&page={$page}'>{$page}</a>&nbsp;";
			}
		}
		//当前页码
		$linkPage.="&nbsp;{$this->page}&nbsp;";
		//右边页码
		for($i=1;$i<=$inum;$i++){
			$page = $this->page+$i;
			if($page>$this->pageNum){
				break;
			}else{
				$linkPage.="&nbsp;<a href='{$this->uri}&page={$page}'>{$page}</a>&nbsp;";
			}
		}
		return $linkPage;
	}

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

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

	private function goPage(){
		return '&nbsp;&nbsp;
		<input id="in" 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=(document.getElementById(\'in\').value>'.$this->pageNum.')?'.$this->pageNum.':document.getElementById(\'in\').value; 
		location=\''.$this->uri.'&page=\'+page+\'\' ">&nbsp;&nbsp;';
	}

	//*可见的成员方法
	function fpage($arr=array(0,1,2,3,4,5,6,7)){
		$html[0]="&nbsp;共有<b>{$this->total}</b>{$this->config['header']}&nbsp;";
		$html[1]="&nbsp;{$this->page}/{$this->pageNum}页&nbsp;";
		$html[2]=$this->first();
		$html[3]=$this->prev();
		$html[4]=$this->pageList();
		$html[5]=$this->next();
		$html[6]=$this->last();
		$html[7]=$this->goPage();
		$fpage='';
		foreach($arr as $index){
			$fpage.=$html[$index];
		}
		return $fpage;
	}






}