<?php 
class pageclass{
  private $total;   //总记录
  private $pagesize;   //每页显示多少条
  private $limit;    //limit
  private $page;    //当前页
  private $pagenum;  //总页码
  private $url;    //地址
  public function __construct($_total,$_pagesize,$page){
    $this->total = $_total ? $_total :1 ;  //总条数
    $this->pagesize = $_pagesize;      //每页显示多少条
    $this->page = $page;          //当前页码
    $this->pagenum = ceil($this->total / $this->pagesize);  //总页码
    $this->limit = "limit ".($this->page-1)*$this->pagesize.",".$this->pagesize;  //分页语句
    $this->url = $this->setUrl();  //地址
  }
  //分页语句
  public function limit(){
    return $this->limit;
  }
  //当前的url地址
  public function setUrl(){
    $server = $_SERVER['REQUEST_URI'];
    $im = explode('/',$server);
    if(empty($_SERVER['PATH_INFO'])){
      $array = array_splice($im,2,0,array('2'=>'index.php'));
    }
    $controller = $im[3];
    $action = $im[4];
    if(empty($_SERVER['PATH_INFO'])){
      $servers = "http://".$_SERVER['HTTP_HOST']."/".$im[1]."/".$controller."/".$action."/";
    }else{
      $servers = "http://".$_SERVER['HTTP_HOST'].$_SERVER['SCRIPT_NAME']."/".$controller."/".$action."/";
    }
    return $servers;
    //return $im;
  }
  //首页
  public function first(){
    //return $this->page;
    if($this->page > 1){
      return "<a href='".$this->url."page/1'>首页</a>";
    }
  }
  //上一页
  public function prev(){
    if($this->page==1){
      $page = 1;
    }else{
      $page = $this->page-1;
    }
    if($this->page > 1){
      return "<a href='".$this->url."page/".$page."'>上一页</a>";
    }else{
      return "<span class='disabled'>上一页</span>";
    }
  }
  //下一页
  public function next(){
    $page = $this->page+1;
    if($this->page < $this->pagenum){
      if(empty($this->page)){
        $pages = $this->page+2;
        return "<a href='".$this->url."page/".$pages."'>下一页</a>";
      }else{
        return "<a href='".$this->url."page/".$page."'>下一页</a>";
      }
    }else{
      return "<span class='disabled'>下一页</span>";
    }
  }
  //尾页
  public function last(){
    if($this->page < $this->pagenum){
      return "<a href='".$this->url."page/".$this->pagenum."'>尾页</a>";
    }
  }
  //分页
  public function showpage(){
    $page_ = "";
    $page_ .= $this->first();
    $page_ .= " ".$this->prev();
    $page_ .= " ".$this->next();
    $page_ .= " ".$this->last();
    return $page_;
  }
}