<?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
                $html.="&nbsp;&nbsp;<a href="{$this->uri}&page=1">{$this->config["first"]}</a>&nbsp;&nbsp;";
 
            return $html;
        }
 
        private function prev(){
            if($this->page==1)
                $html.='';
            else
                $html.="&nbsp;&nbsp;<a href="{$this->uri}&page='.($this->page-1).'">{$this->config["prev"]}</a>&nbsp;&nbsp;";
 
            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;
 
                $linkPage.="&nbsp;<a href="{$this->uri}&page={$page}">{$page}</a>&nbsp;";
 
            }
         
            $linkPage.="&nbsp;{$this->page}&nbsp;";
             
 
            for($i=1; $i<=$inum; $i++){
                $page=$this->page+$i;
                if($page<=$this->pageNum)
                    $linkPage.="&nbsp;<a href="{$this->uri}&page={$page}">{$page}</a>&nbsp;";
                else
                    break;
            }
 
            return $linkPage;
        }
 
        private function next(){
            if($this->page==$this->pageNum)
                $html.='';
            else
                $html.="&nbsp;&nbsp;<a href="{$this->uri}&page='.($this->page+1).'">{$this->config["next"]}</a>&nbsp;&nbsp;";
 
            return $html;
        }
 
        private function last(){
            if($this->page==$this->pageNum)
                $html.='';
            else
                $html.="&nbsp;&nbsp;<a href="{$this->uri}&page='.($this->pageNum).'">{$this->config["last"]}</a>&nbsp;&nbsp;";
 
            return $html;
        }
 
        private function goPage(){
            return '&nbsp;&nbsp;<input style="WIDTH: 25px" value="'.$this->page.'"><input value="GO" type="button">&nbsp;&nbsp;';
        }
        function fpage($display=array(0,1,2,3,4,5,6,7,8)){
            $html[0]="&nbsp;&nbsp;共有<strong>{$this->total}</strong>{$this->config["header"]}&nbsp;&nbsp;";
            $html[1]="&nbsp;&nbsp;每页显示<strong>".($this->end()-$this->start()+1)."</strong>条，本页<strong>{$this->start()}-{$this->end()}</strong>条&nbsp;&nbsp;";
            $html[2]="&nbsp;&nbsp;<strong>{$this->page}/{$this->pageNum}</strong>页&nbsp;&nbsp;";
             
            $html[3]=$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;
 
        }
 
     
    }