PHP和MYSQL的算法疑问
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2022-04-21 13:13:58
...
已知表t1
id txt parent
--------------------------
1 上山打老虎 0
2 一二三四五 0
3 老虎不在家 1
4 啦啦啦啦啦 1
5 啊啊啊啊啊 2
6 嗯嗯恩恩恩 0
.
.
.希望通过一次查询
mysql_query("SELECT id,txt,parent FROM t1 ORDER BY id DESC")经过php对数据的重新排列
这里的代码应该怎么写？？？得到如下结构的数据
-
嗯嗯恩恩恩
-
一二三四五
-
啊啊啊啊啊
-
上山打老虎
-
啦啦啦啦啦
-
老虎不在家
这个过程中的PHP处理代码或者算法应该怎么写？求指点。
回复内容：
已知表t1
id txt parent
--------------------------
1 上山打老虎 0
2 一二三四五 0
3 老虎不在家 1
4 啦啦啦啦啦 1
5 啊啊啊啊啊 2
6 嗯嗯恩恩恩 0
.
.
.希望通过一次查询
mysql_query("SELECT id,txt,parent FROM t1 ORDER BY id DESC")经过php对数据的重新排列
这里的代码应该怎么写？？？得到如下结构的数据
-
嗯嗯恩恩恩
-
一二三四五
-
啊啊啊啊啊
-
上山打老虎
-
啦啦啦啦啦
-
老虎不在家
这个过程中的PHP处理代码或者算法应该怎么写？求指点。
Array
(
[1] => Web Server
[3] => Nginx
[4] => Apache
)
[2] => Array
(
[2] => Database
[5] => MySQL
)
[6] => Array
(
[6] => Browser
)
)
Code
/**
* 无限子级递归循环
* @param [type] $data [description]
* @param integer $pid [description]
* @return [type] [description]
*/
function unlimitedForChild ($data, $pid = 0) {
$array = array();
foreach ($data as $value) {
if ($value['parent'] == $pid) {
$value['child'] = unlimitedForChild($data, $value['id']);
$array[] = $value;
}
}
return $array;
}
$data = array(
array(
'id' => 1,
'txt' => '上山打老虎',
'parent' => 0
),
array(
'id' => 2,
'txt' => '一二三四五',
'parent' => 0
),
array(
'id' => 3,
'txt' => '老虎不在家',
'parent' => 1
),
array(
'id' => 4,
'txt' => '啦啦啦啦啦',
'parent' => 1
),
array(
'id' => 5,
'txt' => '啊啊啊啊啊',
'parent' => 2
),
array(
'id' => 6,
'txt' => '嗯嗯恩恩恩',
'parent' => 0
),
//附加3级
array(
'id' => 7,
'txt' => '第三级',
'parent' => 3
),
);
$result = unlimitedForChild($data);
echo '';
print_r($result);
echo '
';
Result
Array
(
[0] => Array
(
[id] => 1
[txt] => 上山打老虎
[parent] => 0
[child] => Array
(
[0] => Array
(
[id] => 3
[txt] => 老虎不在家
[parent] => 1
[child] => Array
(
[0] => Array
(
[id] => 7
[txt] => 第三级
[parent] => 3
[child] => Array
(
)
)
)
)
[1] => Array
(
[id] => 4
[txt] => 啦啦啦啦啦
[parent] => 1
[child] => Array
(
)
)
)
)
[1] => Array
(
[id] => 2
[txt] => 一二三四五
[parent] => 0
[child] => Array
(
[0] => Array
(
[id] => 5
[txt] => 啊啊啊啊啊
[parent] => 2
[child] => Array
(
)
)
)
)
[2] => Array
(
[id] => 6
[txt] => 嗯嗯恩恩恩
[parent] => 0
[child] => Array
(
)
)
)
Array
(
[name] => Web Server
[sub] => Array
(
[3] => Array
(
[name] => Nginx
)
[4] => Array
(
[name] => Apache
)
)
)
[2] => Array
(
[name] => Database
[sub] => Array
(
[5] => Array
(
[name] => MySQL
)
)
)
[6] => Array
(
[name] => Browser
)
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