php分类

<?php
/*
 * PHP分页类
 * @package Page
 * @Created 2013-03-27
 * @Modify  2013-03-27
 * @link http://www.60ie.net
 * Example:
       $myPage=new Pager(1300,intval($CurrentPage));
       $pageStr= $myPage->GetPagerContent();
       echo $pageStr;
 */
class Pager {
    private $pageSize = 10;
    private $pageIndex;
    private $totalNum;    

    private $totalPagesCount;    

    private $pageUrl;
    private static $_instance;    

    public function __construct($p_totalNum, $p_pageIndex, $p_pageSize = 10,$p_initNum=3,$p_initMaxNum=5) {
        if (! isset ( $p_totalNum ) || !isset($p_pageIndex)) {
            die ( "pager initial error" );
        }    

        $this->totalNum = $p_totalNum;
        $this->pageIndex = $p_pageIndex;
        $this->pageSize = $p_pageSize;
        $this->initNum=$p_initNum;
        $this->initMaxNum=$p_initMaxNum;
        $this->totalPagesCount= ceil($p_totalNum / $p_pageSize);
        $this->pageUrl=$this->_getPageUrl();    

         $this->_initPagerLegal();
    }    

  /**
    * 获取去除page部分的当前URL字符串
    *
    * @return String URL字符串
    */
  private function _getPageUrl() {
        $CurrentUrl = $_SERVER["REQUEST_URI"];
        $arrUrl     = parse_url($CurrentUrl);
        $urlQuery   = $arrUrl["query"];    

        if($urlQuery){
            $urlQuery  = ereg_replace("(^|&)page=" . $this->pageIndex, "", $urlQuery);
            $CurrentUrl = str_replace($arrUrl["query"], $urlQuery, $CurrentUrl);    

            if($urlQuery){
                 $CurrentUrl.="&page";
            }
            else $CurrentUrl.="page";    

        } else {
            $CurrentUrl.="?page";
        }    

    return $CurrentUrl;    

  }
  /*
   *设置页面参数合法性
   *@return void
  */
  private function _initPagerLegal()
  {
      if((!is_numeric($this->pageIndex)) ||  $this->pageIndex<1)
      {
          $this->pageIndex=1;
      }elseif($this->pageIndex > $this->totalPagesCount)
      {
          $this->pageIndex=$this->totalPagesCount;
      }    

  }
//$this->pageUrl}={$i}
//{$this->CurrentUrl}={$this->TotalPages}
    public function GetPagerContent() {
        $str = "<div class=\"Pagination\">";
        //首页 上一页
        if($this->pageIndex==1)
        {
            $str .="<a href='javascript:void(0)' class='tips' title='首页'>首页</a> "."\n";
            $str .="<a href='javascript:void(0)' class='tips' title='上一页'>上一页</a> "."\n"."\n";
        }else
        {
            $str .="<a href='{$this->pageUrl}=1' class='tips' title='首页'>首页</a> "."\n";
                    $str .="<a href='{$this->pageUrl}=".($this->pageIndex-1)."' class='tips' title='上一页'>上一页</a> "."\n"."\n";
        }    

        /*   

        除首末后 页面分页逻辑   

        */
         //10页（含）以下
         $currnt="";
         if($this->totalPagesCount<=10)
         {    

            for($i=1;$i<=$this->totalPagesCount;$i++)    

            {
                       if($i==$this->pageIndex)
                       {    $currnt=" class='current'";}
                       else
                       {    $currnt="";    }
                        $str .="<a href='{$this->pageUrl}={$i} ' {$currnt}>$i</a>"."\n" ;
            }
         }else                                //10页以上
         {   if($this->pageIndex<3)  //当前页小于3
             {
                     for($i=1;$i<=3;$i++)
                     {
                         if($i==$this->pageIndex)
                           {    $currnt=" class='current'";}
                         else
                         {    $currnt="";    }
                        $str .="<a href='{$this->pageUrl}={$i} ' {$currnt}>$i</a>"."\n" ;
                     }    

                     $str.="<span class=\"dot\">……</span>"."\n";    

                 for($i=$this->totalPagesCount-3+1;$i<=$this->totalPagesCount;$i++)//功能1
                 {
                      $str .="<a href='{$this->pageUrl}={$i}' >$i</a>"."\n" ;    

                 }
             }elseif($this->pageIndex<=5)   //   5 >= 当前页 >= 3
             {
                 for($i=1;$i<=($this->pageIndex+1);$i++)
                 {
                      if($i==$this->pageIndex)
                       {    $currnt=" class='current'";}
                       else
                       {    $currnt="";    }
                        $str .="<a href='{$this->pageUrl}={$i} ' {$currnt}>$i</a>"."\n" ;    

                 }
                 $str.="<span class=\"dot\">……</span>"."\n";    

                 for($i=$this->totalPagesCount-3+1;$i<=$this->totalPagesCount;$i++)//功能1
                 {
                      $str .="<a href='{$this->pageUrl}={$i}' >$i</a>"."\n" ;    

                 }    

             }elseif(5<$this->pageIndex  &&  $this->pageIndex<=$this->totalPagesCount-5 )             //当前页大于5，同时小于总页数-5    

             {    

                 for($i=1;$i<=3;$i++)
                 {
                     $str .="<a href='{$this->pageUrl}={$i}' >$i</a>"."\n" ;
                 }
                  $str.="<span class=\"dot\">……</span>";
                 for($i=$this->pageIndex-1 ;$i<=$this->pageIndex+1 && $i<=$this->totalPagesCount-5+1;$i++)
                 {
                       if($i==$this->pageIndex)
                       {    $currnt=" class='current'";}
                       else
                       {    $currnt="";    }
                        $str .="<a href='{$this->pageUrl}={$i} ' {$currnt}>$i</a>"."\n" ;
                 }
                 $str.="<span class=\"dot\">……</span>";    

                 for($i=$this->totalPagesCount-3+1;$i<=$this->totalPagesCount;$i++)
                 {
                      $str .="<a href='{$this->pageUrl}={$i}' >$i</a>"."\n" ;    

                 }
             }else
             {    

                  for($i=1;$i<=3;$i++)
                 {
                     $str .="<a href='{$this->pageUrl}={$i}' >$i</a>"."\n" ;
                 }
                  $str.="<span class=\"dot\">……</span>"."\n";    

                  for($i=$this->totalPagesCount-5;$i<=$this->totalPagesCount;$i++)//功能1
                 {
                       if($i==$this->pageIndex)
                       {    $currnt=" class='current'";}
                       else
                       {    $currnt="";    }
                        $str .="<a href='{$this->pageUrl}={$i} ' {$currnt}>$i</a>"."\n" ;    

                 }
            }           

         }    

        /*   

        除首末后 页面分页逻辑结束   

        */   

        //下一页 末页
        if($this->pageIndex==$this->totalPagesCount)
        {
            $str .="\n"."<a href='javascript:void(0)' class='tips' title='下一页'>下一页</a>"."\n" ;
            $str .="<a href='javascript:void(0)' class='tips' title='末页'>末页</a>"."\n";    

        }else
        {
            $str .="\n"."<a href='{$this->pageUrl}=".($this->pageIndex+1)."' class='tips' title='下一页'>下一页</a> "."\n";
            $str .="<a href='{$this->pageUrl}={$this->totalPagesCount}' class='tips' title='末页'>末页</a> "."\n" ;
        }           

        $str .= "</div>";
        return $str;
    }    

/**
 * 获得实例
 * @return
 */
//  static public function getInstance() {
//      if (is_null ( self::$_instance )) {
//          self::$_instance = new pager ();
//      }
//      return self::$_instance;
//  }    

}
?>