时间：2021-07-01 10:21:17 帮助过：31人阅读
mysql_connect();
//测试数据
$sql =<<< SQL
select * from (
select '1' as id, '0' as pid, 'Food' as title
union all select '2', '1', 'Fruit'
union all select '3', '2', 'Red'
union all select '4', '3', 'Cherry'
union all select '5', '2', 'Yellow'
union all select '6', '5', 'Banana'
union all select '7', '1', 'Meat'
union all select '8', '7', 'Beef'
union all select '9', '7', 'Pork'
) t
order by pid, id
SQL;
$rs = mysql_query($sql);
$res = array(); //结果数组
$ind = array(); //索引数组
while($row = mysql_fetch_assoc($rs)) {
list($id, $pid) = array_values($row);
$ind[$id] = $row;
if(isset($ind[$pid])) $ind[$pid]['child'][$id] =& $ind[$id]; //构造索引
if($pid == 0) $res[$id] =& $ind[$id]; //转存根节点组
}
echo '' . print_r($res, 1);<br /></pre>Array<br />(<br /> [1] => Array<br /> (<br /> [id] => 1<br /> [pid] => 0<br /> [title] => Food<br /> [child] => Array<br /> (<br /> [2] => Array<br /> (<br /> [id] => 2<br /> [pid] => 1<br /> [title] => Fruit<br /> [child] => Array<br /> (<br /> [3] => Array<br /> (<br /> [id] => 3<br /> [pid] => 2<br /> [title] => Red<br /> [child] => Array<br /> (<br /> [4] => Array<br /> ( </div> <div class=""> <ul class="m-news-opt fix"> <li class="opt-item"> <a href='/PHPjiqiao-126321.html' target='_blank'><p>< 上一篇</p><p class="ellipsis">请问：PHP中，怎么获取提交的二维数组中某几列键值不为空的结果</p></a> </li> <li class="opt-item ta-r"> <a href='/PHPjiqiao-126323.html' target='_blank'><p>下一篇 ></p><p class="ellipsis">批改PHPCMSV9相关文章、专题listorder、order排序功能的方法</p></a> </li> </ul> </div> </div> </div> <div class="g-title fix"> <h2 class="title-txt">人气教程排行</h2> </div> <div class="m-rank u-dashed mb40"> <ul> <li class="rank-item"> <a href="/PHPjiqiao-379253.html" title='php如何获取跳转前的url' 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