一句代码实现美观的分页功能：（将$pageArr的where元素添加到分页查询数据库语

在框架中引入，只需更改命名空间，调用$pageArr = PageStr::pageStr($sum,$set='a.id',$showNums);其中$sum是数据总量，$set是分页依据字段，$showNums是每页显示的数据量；结果返回数组array('pageStr'=>$pageStr,'sum'=>$sum,'where'=>$where);分别是分页字符串，要分页的数据总量，分页条件：如where id>n order by id limit m;(优化替换limit offset,len)

 = 2 显示首页、上一页

            $str = '';
            if( $page > 1 ){
                $str .= "
首页
 ";
                $str .= " 
<<上一页
 ";
            }

            // 5.页码显示

            // 计算循环起始

            $half = ceil(self::$pageShowNum/2);

            // 先设置起始页码，再跟进起始页码设置结束页码 $pageShowNum 显示的页码个数

            // 1.假设$page在正中间，

            // 2.那么$start = $page-ceil($pageShowNum/2)；

            // 3.如果$start < 1 ,起始页码 $start = 1

            // 4.此时结束页码 $end = $start + $pageShowNum -1;

            // 5.r如果$end > $pages ;$end = $pages, $start = $end - $pageShowNum +1

            $start = $page-$half+1;

            if($start<1)$start = 1;
            $end   = $start+self::$pageShowNum-1;
            if($end > $pages){
                $end = $pages;
                $start = $end - self::$pageShowNum+1;
            }

            for( $i=$start; $i <=$end ; $i++){
                if($i == $page){
                    $str .= " 
$i
 ";
                }else{
                    $str .= " 
$i
 ";
                }
            }

            // 6.下一页和尾页

            if( $page != $pages && $pages!=0){

                $str .= " 
下一页>>
 ";
                $str .= "
尾页
 ";
            }

            return $str;
        }

        /**
         * [输出分页字符串，要分页的数据总量，分页条件where id>n order by id limit 替换 limit offset len]
         * @param  [int]  $sum      [要分页的数据总量]
         * @param  string  $set      [分页依据字段，一般为主键id]
         * @param  integer $showNums [每页显示的数据量]
         * @return [array]            [输出分页字符串，要分页的数据总量，分页条件where id>n order by id limit 替换 limit offset len]
         */
        public static function pageStr($sum,$set='id',$showNums=5){
            //获取当前页码
            if(isset($_GET['page'])){
                $page = intval($_GET['page']);    
                //分页起始位置
                $start = $page?($page-1)*$showNums:0;      
            }else $start = 0;   

            //优化查询分页用where id>n order by id limit 替换 limit offset len
            $where = " WHERE ( {$set} >{$start} ) ORDER BY {$set} LIMIT {$showNums}";

            // 获取当前工作路径
            $uri = $_SERVER['REQUEST_URI'];
            $uri = substr_replace($uri,'?',stripos($uri,'?'));

            // 输出分页字符串
            $pageStr = self::pages($sum,$uri,$showNums);
            return array('pageStr'=>$pageStr,'sum'=>$sum,'where'=>$where);
        }

    }

?>
下面是css样式代码，请自行分离
/************************************ 翻页 ********************************/
.pagination {
  height: 36px;
  margin: 18px 0;
  float: right;
}
.pagination ul {
  display: inline-block;
  *display: inline;
  /* IE7 inline-block hack */

  *zoom: 1;
  margin-left: 0;
  margin-bottom: 0;
  -webkit-border-radius: 3px;
  -moz-border-radius: 3px;
  border-radius: 3px;
  -webkit-box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
  -moz-box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}
.pagination li {
  display: inline;
}
.pagination a,.pagination span {
  float: left;
  padding: 0 14px;
  line-height: 34px;
  text-decoration: none;
  border: 1px solid #ddd;
  border-left-width: 0;
}
.pagination a:hover,
.pagination .active a,.pagination .active span {
  background-color: #f5f5f5;
}
.pagination .active a,.pagination .active span {
  color: #999999;
  cursor: default;
}
.pagination .disabled span,
.pagination .disabled a,
.pagination .disabled a:hover {
  color: #999999;
  background-color: transparent;
  cursor: default;
}
.pagination li:first-child a,.pagination li:first-child span {
  border-left-width: 1px;
  -webkit-border-radius: 3px 0 0 3px;
  -moz-border-radius: 3px 0 0 3px;
  border-radius: 3px 0 0 3px;
}
.pagination li:last-child a,.pagination li:last-child span {
  -webkit-border-radius: 0 3px 3px 0;
  -moz-border-radius: 0 3px 3px 0;
  border-radius: 0 3px 3px 0;
}
.pagination-centered {
  text-align: center;
}
.pagination-right {
  text-align: right;
}
.pager {
  margin-left: 0;
  margin-bottom: 18px;
  list-style: none;
  text-align: center;
  *zoom: 1;
}
.pager:before,
.pager:after {
  display: table;
  content: "";
}
.pager:after {
  clear: both;
}
.pager li {
  display: inline;
}
.pager a {
  display: inline-block;
  padding: 5px 14px;
  background-color: #fff;
  border: 1px solid #ddd;
  -webkit-border-radius: 15px;
  -moz-border-radius: 15px;
  border-radius: 15px;
}
.pager a:hover {
  text-decoration: none;
  background-color: #f5f5f5;
}
.pager .next a {
  float: right;
}
.pager .previous a {
  float: left;
}
.pager .disabled a,
.pager .disabled a:hover {
  color: #999999;
  background-color: #fff;
  cursor: default;
}