php 分頁類

<?php
    class Page {
        private $total; //數據表中總記錄數
        private $listRows; //每頁顯示行數
        private $limit;
        private $uri;
        private $pageNum; //頁數
        private $config=array('header'=>"個記錄", "prev"=>"上一頁", "next"=>"下一頁", "first"=>"首 頁", "last"=>"尾 頁");
        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;
            $parse=parse_url($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
   
             $html.="&nbsp;&nbsp;<a 
href='javascript:setPage(\"{$this->uri}&page=1\")'>{$this->config["first"]}</a>&nbsp;&nbsp;";

            return $html;
        }

        private function prev(){
            if($this->page==1)
                $html.='';
            else
   
             $html.="&nbsp;&nbsp;<a 
href='javascript:setPage(\"{$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;

   
             $linkPage.="&nbsp;<a 
href='javascript:setPage(\"{$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)
   
                 $linkPage.="&nbsp;<a 
href='javascript:setPage(\"{$this->uri}&page={$page}\")'>{$page}</a>&nbsp;";
                else
                    break;
            }

            return $linkPage;
        }

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

            return $html;
        }

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

            return $html;
        }

        private function goPage(){
   
         return '&nbsp;&nbsp;<input type="text" 
onkeydown="javascript:if(event.keyCode==13){var 
page=(this.value>'.$this->pageNum.')?'.$this->pageNum.':this.value;setPage(\''.$this->uri.'&page=\'+page+\'\')}"
 value="'.$this->page.'" style="width:25px"><input 
type="button" value="GO" onclick="javascript:var 
page=(this.previousSibling.value>'.$this->pageNum.')?'.$this->pageNum.':this.previousSibling.value;setPage(\''.$this->uri.'&page=\'+page+\'\')">&nbsp;&nbsp;';
        }
        function fpage($display=array(0,1,2,3,4,5,6,7,8)){
   
         $html[0]="&nbsp;&nbsp;共有<b>{$this->total}</b>
{$this->config["header"]}&nbsp;&nbsp;";
            $html[1]="&nbsp;&nbsp;每頁顯示<b>".($this->end()-$this->
start()+1)."</b>條，本頁<b>{$this->start()}-
{$this->end()}</b>條&nbsp;&nbsp;";
            $html[2]="&nbsp;&nbsp;<b>{$this->page}/{$this->pageNum}</b>頁&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;

        }

    
    }