php实现导出数据分类合并单元格功能

 <?php
     $conn = mysql_connect("localhost","root","root");
     $db = mysql_select_db("imexcel",$conn);
     mysql_query("set names 'gbk'");

     $query = "SELECT danwei,count(danwei) as num ,group_concat(fuze SEPARATOR ',') as gw FROM `dy` group by danwei";
     $result = mysql_query($query);
     header("Content-type:application/vnd.ms-excel;charset=GBK");
     header("Content-Disposition:filename=test.xls");
     echo '
         <table border="1">
             <caption class="text-center">信息统计表</caption>
                <thead>
                     <tr >
                         <th>单位</th>
                         <th>负责人</th>
                     </tr>
                </thead>
               <tbody>
               ';
                while($row = mysql_fetch_array($result)) {
                    $gw = explode(",",$row['gw']);
                    echo '
                    <tr>
                        <td rowspan="'.$row['num'].'">'.$row['danwei'].'</td>
                        <td>'.iconv("gbk","utf-8",$gw[0]).'</td>
                    </tr>
                    ';
                     if($row['num'] > 1){
                         for($i=1;$i<$row['num'];$i++){
                             echo '<tr><td>'.iconv("gbk","utf-8",$gw[$i]).'</td></tr>';
                         }
                     }else{

                     }

                }

 echo '
             </tbody>
         </table>
     ';
 ?>

 CREATE TABLE IF NOT EXISTS `dy` (
   `id` int(11) unsigned NOT NULL AUTO_INCREMENT,
   `danwei` varchar(30) NOT NULL,
   `fuze` varchar(30) NOT NULL,
   PRIMARY KEY (`id`)
 ) ENGINE=MyISAM  DEFAULT CHARSET=gbk AUTO_INCREMENT=7 ;

 --
 -- 转存表中的数据 `dy`
 --

 INSERT INTO `dy` (`id`, `danwei`, `fuze`) VALUES
 (1, 'a', '小张'),
 (2, 'a', '小孙'),
 (3, 'b', '小王'),
 (4, 'c', '小李'),
 (5, 'a', '小红'),
 (6, 'b', '小赵');

功能实现预览：