PHP分页类

<?php  
    class Page {  
          private $total;        //总记录  
          private $pagesize;     //每页显示多少条  
          private $limit;        //limit  
          private $page;         //当前页码  
          private $pagenum;      //总页码  
          private $url;          //地址  
          private $bothnum;      //两边保持数字分页的量  
    
      //构造方法初始化  
      public function __construct($_total, $_pagesize) {  
         $this->total = $_total ? $_total : 1;  
         $this->pagesize = $_pagesize;  
         $this->pagenum = ceil($this->total / $this->pagesize);  
         $this->page = $this->setPage();  
         $this->limit = "LIMIT ".($this->page-1)*$this->pagesize.",$this->pagesize";  
         $this->url = $this->setUrl();  
         $this->bothnum = 2;  
      }  
    
      //拦截器  
      public function __get($_key) {  
         return $this->$_key;  
      }  
    
      //获取当前页码  
      private function setPage() {  
         if (!empty($_GET['page'])) {  
                if ($_GET['page'] > 0) {  
                   if ($_GET['page'] > $this->pagenum) {  
                          return $this->pagenum;  
                   } else {  
                          return $_GET['page'];  
                   }  
                } else {  
                   return 1;  
                }  
         } else {  
                return 1;  
         }  
      }   
    
      //获取地址  
      private function setUrl() {  
         $_url = $_SERVER["REQUEST_URI"];  
         $_par = parse_url($_url);  
         if (isset($_par['query'])) {  
                parse_str($_par['query'],$_query);  
                unset($_query['page']);  
                $_url = $_par['path'].'?'.http_build_query($_query);  
         }  
         return $_url;  
      }   
        
      //数字目录  
      private function pageList() {       
          $_pagelist = '';
          for($i=1;$i<=$this->pagenum;$i++){ 
              if($i==$this->page){
                  $_pagelist .= ' <a class="numPage amaright10 selectNumpage">'.$i.'</a> ';
              }else{
                  $_pagelist .= ' <a class="numPage amaright10" href="'.$this->url.'&page='.$i.'">'.$i.'</a>';
              }
          }
         return $_pagelist;  
      }
    
      //首页  
      private function first() {     
         return ' <a class="indexPage indexPagetwo amaright10" href="'.$this->url.'">首页</a>';
      }  
    
      //上一页  
      private function prev() {  
         if ($this->page == 1) {  
               return ' <a class="indexPage amaright15" href="javascript:void(0)">上一页</a> ';  
         }  else{
             return ' <a class="indexPage amaright15" href="'.$this->url.'&page='.($this->page-1).'">上一页</a> ';
         }
              
      }  
    
      //下一页  
      private function next() {  
         if ($this->page == $this->pagenum) {  
             return ' <a class="indexPage amaright15" href="javascript:void(0)">下一页</a> ';   
         }else{
             return ' <a class="indexPage amaright15" href="'.$this->url.'&page='.($this->page+1).'">下一页</a> ';
         }  
           
      }  
    
      //尾页  
      private function last() {  
         return '<a class="indexPage indexPagetwo" href="'.$this->url.'&page='.$this->pagenum.'">尾页</a> '; 
      }  
    
      //分页信息  
      public function showpage() {  
         $_page = '';
         $_page .= $this->first();  
         $_page .= $this->prev();
         $_page .= $this->pageList();  
         $_page .= $this->next();  
         $_page .= $this->last();
         return $_page;  
      }  
 }  
?>