php 分页类

2019独角兽企业重金招聘Python工程师标准>>>

分页公式：页数=（总记录数-1）/每页显示记录数+1；

借助这个公式，实现以下分页类；

<?php

   class Fpage{
       private $total; //数据表中总记录数
       private $listRows;   //每页显示的行数
       private $limit;
       private $uri;
       private $pageNum;   //行数
       private $config = array("header"=>"记录","pre"=>"上一页","next"=>"下一页","first"=>"首页",
                               "last"=>"尾页");

       public function __construct($total,$listRows=5){
           $this->total = $total;
           $this->listRows = $listRows;
           $this->uri = $this->getUri();
           $this->page = !empty($_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(){
           $url = $_SERVER["REQUEST_URI"].(strpos($_SERVER["REQUEST_URI"],'?')?'':"?");
           $parse = parse_url($url);

           if(isset($parse["query"])){
               parse_str($parse["query"],$params);
               unset($params['page']);
               $url = $parse['path'].'?'.http_build_query($params);
           }
           return $url;
       }

       public 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{
               $html.="  <a href='{$this->uri}&page=1'>{$this->config['first']}</a>  ";
           }
           return $html;
       }

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

       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;
       }

       private function pageList(){
           $pageLink = '';
           $inum = floor($this->pageNum/2);
           for($i=$inum;$i>=1;$i--){
               $page = $this->page-$i;
               if($page<1)continue;
               else{
                   $pageLink.=" <a href='{$this->uri}&page={$page}'>{$page}</a> ";
               }
               }
           $pageLink.=" {$this->page} ";
           for($i=1;$i<$inum;$i++){
               $page = $this->page+$i;
               if($page<=$this->pageNum){
                   $pageLink .= " <a href='{$this->uri}&page={$page}'>{$page}</a> ";
               }
               else break;
           }
           return $pageLink;
       }

       private function goPage(){
           return '  <input type="text" οnkeydοwn="javascript:if(event.keyCode == 13){var page=(this.value>'.$this->pageNum.')?'.$this->pageNum.':this.value;location=\''.$this->uri.'&page=\'+page+\'\'}" style="width:35" value='.$this->page.'><input type="button" value="GO" οnclick="javascript:if(event.keyCode == 13){var page=(this.previousSibling.value>'.$this->pageNum.')?'.$this->pageNum.':this.previousSibling.value;location=\''.$this->uri.'&page=\'+page+\'\'}">  ';

       }

       public function fpage($display=array(0,1,2,3,4,5,6,7,8)){
           $html[0]= "  共有<b>{$this->total}</b>条{$this->config['header']}  ";
           $html[1]= "  每页显示<b>{$this->listRows}</b>条{$this->config['header']},
                   本页<b>{$this->start()}-{$this->end()}</b>条  ";
           $html[2]="  <b>{$this->page}/{$this->pageNum}</b>页  ";
           $html[3]=$this->first();
           $html[4]=$this->pre();
           $html[5]=$this->pageList();
           $html[6]=$this->next();
           $html[7]=$this->last();
           $html[8]=$this->goPage();

           foreach($display as $key){
               $Fpage.=$html[$key];
           }
           return $Fpage;
       }
   }
?>

应用：