<?php
/*
假设你有如下树形结构的数据，树形结构的数据有很多种方法处理，在这里我就不多说了。
数据结构说明：id , pid , name , child 字段是必须的，level不是必须的，在这里用不上。
*/
$data = array (1 =>array ('id' => 1,'pid' => 0,'name' => '北京','level' => 1,'child' =>array (0 =>array ('id' => 2,'pid' => 1,'name' => 'BTV纪实','level' => 2,'child' =>array (0 =>array ('id' => 5,'pid' => 2,'name' => '全纪实','level' => 3,'child' =>array (),),1 =>array ('id' => 6,'pid' => 2,'name' => '奇趣自然','level' => 3,'child' =>array (),),),),1 =>array ('id' => 3,'pid' => 1,'name' => '北京文艺频道','level' => 2,'child' =>array (0 =>array ('id' => 8,'pid' => 3,'name' => '我家有明星','level' => 3,'child' =>array (),),),),2 =>array ('id' => 4,'pid' => 1,'name' => '北京财经频道','level' => 2,'child' =>array (0 =>array ('id' => 9,'pid' => 4,'name' => '理财','level' => 3,'child' =>array (),),1 =>array ('id' => 10,'pid' => 4,'name' => '财富晚间道','level' => 3,'child' =>array (),),),),),),11 =>array ('id' => 11,'pid' => 0,'name' => '江苏','level' => 1,'child' =>array (0 =>array ('id' => 12,'pid' => 11,'name' => '江苏卫视','level' => 2,'child' =>array (0 =>array ('id' => 13,'pid' => 12,'name' => '最強大腦','level' => 3,'child' =>array (),),1 =>array ('id' => 14,'pid' => 12,'name' => '風光片','level' => 3,'child' =>array (),),),),1 =>array ('id' => 15,'pid' => 11,'name' => '江苏教育电视台','level' => 2,'child' =>array (),),),),
);//稍作处理统计出要合并单元的数
foreach ($data as $key => $val )
{$c1 = 0;foreach ($val['child'] as $key1 => $val1){$data[$key]['child'][$key1]['count'] = count($val1['child'])?:1;$c1 += $data[$key]['child'][$key1]['count'];}$data[$key]['count'] = $c1;
}
?><!-- 稍微加一下table的细边框，个人觉得table自带的border实在是太难看了 -->
<style type="text/css">.border-table{background:#663333;border:0px;}.border-table tr td{background:#fff;font-size:11px;}
</style><!--  下面就可以循环输出table了，经确认table的DOM结构是完整的，不缺少任何标签，尽管在table里缺少<tr>也不影响显示，但是为了追求完美，咱还是不缺的好  -->
<table style="width:80%;" cellpadding="6" cellspacing="1" class="border-table">
<caption>合并单元格</caption>
<?php foreach($data as $val):?><tr><td rowspan="<?php echo $val['count'];?>"><?php echo $val['name'];?></td><?php if($val['child']):?><?php foreach($val['child'] as $key1=>$val1):?><?php if($key1 != 0):?><tr><?php endif;?><td rowspan="<?php echo $val1['count'];?>"><?php echo $val1['name'];?></td><?php if($val1['child']):?><?php foreach($val1['child'] as $key2=>$val2):?><?php if($key2 != 0):?><tr><?php endif;?><td><?php echo $val2['name'];?></td></tr><?php endforeach;?><?php else:?><td></td></tr><?php endif;?><?php endforeach;?><?php else:?><td></td><td></td></tr><?php endif;?>
<?php endforeach;?>
</table>

<?php
//$data 树形的数据结构，同上
foreach ($data as $key => $val )
{$c1 = 0;foreach ($val['child'] as $key1 => $val1){$data[$key]['child'][$key1]['child'][] = array('name'=>'添加');$data[$key]['child'][$key1]['count'] = count($val1['child'])+1;$c1 += $data[$key]['child'][$key1]['count'];}$data[$key]['count'] = $c1;
}
?><style type="text/css">.border-table{background:#663333;border:0px;}.border-table tr td{background:#fff;font-size:11px;}
</style><table style="width:80%;" cellpadding="6" cellspacing="1" class="border-table">
<caption>合并单元格</caption>
<?php foreach($data as $val):?><tr><td rowspan="<?php echo $val['count'];?>"><?php echo $val['name'];?></td><?php if($val['child']):?><?php foreach($val['child'] as $key1=>$val1):?><?php if($key1 != 0):?><tr><?php endif;?><td rowspan="<?php echo $val1['count'];?>"><?php echo $val1['name'];?></td><?php if($val1['child']):?><?php foreach($val1['child'] as $key2=>$val2):?><?php if($key2 != 0):?><tr><?php endif;?><td><?php if($key2 != $val1['count']-1):?><?php echo $val2['name'];?><?php else:?><a href="#"><?php echo $val2['name'];?></a><?php endif;?></td></tr><?php endforeach;?><?php else:?><td></td></tr><?php endif;?><?php endforeach;?><?php else:?><td></td><td></td></tr><?php endif;?>
<?php endforeach;?>
</table>