PHP实现的简单分页类及用法示例

本文实例讲述了PHP实现的简单分页类及用法。分享给大家供大家参考，具体如下：

sql = $sql_in;
    $this->page = intval($page_in);
    $this->pageSize = $pageSize_in;
    $this->pageStr = $pageStr_in;
    //页码为空或小于1的处理
    if(!$this->page||$this->page<1)
    {
      $this->page = 1;
    }
    //查询总记录数
    $rowCountSql = preg_replace("/([wW]*?select)([wW]*?)(from[wW]*?)/i","$1 count(0) $3",$this->sql);
    if(!$conn)
      $rs = mysql_query($rowCountSql) or die("bnc.page: error on getting rowCount.");
    else
      $rs = mysql_query($rowCountSql,$conn) or die("bnc.page: error on getting rowCount.");
    $rowCountRow = mysql_fetch_row($rs);
    $this->rowCount=$rowCountRow[0];
    //计算总页数
    if($this->rowCount%$this->pageSize==0)
      $this->pageCount = intval($this->rowCount/$this->pageSize);
    else
      $this->pageCount = intval($this->rowCount/$this->pageSize)+1;
    //SQL偏移量
    $offset = ($this->page-1)*$this->pageSize;
    if(!$conn)
      $rs = mysql_query($this->sql." limit $offset,".$this->pageSize) or die("bnc.page: error on listing.");
    else
      $rs = mysql_query($this->sql." limit $offset,".$this->pageSize,$conn) or die("bnc.page: error on listing.");
    while($row=mysql_fetch_array($rs))
    {
      $this->list[]=$row;
    }
    $this->listSize = count($this->list);
  }
  
  function getPageList()
  {
    $firstPage;
    $previousPage;
    $pageList;
    $nextPage;
    $lastPage;
    $currentPage;
    //如果页码>1则显示首页连接
    if($this->page>1)
    {
      $firstPage = "pageStr."1">首页";
    }
    //如果页码>1则显示上一页连接
    if($this->page>1)
    {
      $previousPage = "pageStr.($this->page-1)."">上一页";
    }
    //如果没到尾页则显示下一页连接
    if($this->page<$this->pageCount)
    {
      $nextPage = "pageStr.($this->page+1)."">下一页";
    }
    //如果没到尾页则显示尾页连接
    if($this->page<$this->pageCount)
    {
      $lastPage = "pageStr.$this->pageCount."">尾页";
    }
    //所有页码列表
    for($counter=1;$counter<=$this->pageCount;$counter++)
    {
      if($this->page == $counter)
      {
 $currentPage = "".$counter."";
      }
      else
      {
 $currentPage = " "."pageStr.$counter."">".$counter.""." ";
      }
      $pageList .= $currentPage;
    }
    return $firstPage." ".$previousPage." ".$pageList." ".$nextPage." ".$lastPage." ";
  }
}
?>

用法示例：

list;
foreach($rows as $row)
{
  echo $row['UserName']."
";
}
echo $page->getPageList(); //输出分页列表
?>

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希望本文所述对大家PHP程序设计有所帮助。