PHP和MYSQL的算法疑问
- WBOY原創
- 2016-06-06 20:28:331269瀏覽
已知表t1
<code> 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
.
.
.</code>
希望通过一次查询
<code>mysql_query("SELECT id,txt,parent FROM t1 ORDER BY id DESC")</code>
经过php对数据的重新排列
<code>这里的代码应该怎么写？？？</code>
得到如下结构的数据
<code><ul>
<li id="6">
<b>嗯嗯恩恩恩</b>
</li>
<li id="2">
<b>一二三四五</b>
<ul>
<li id="5">
<b>啊啊啊啊啊</b>
</li>
</ul>
</li>
<li id="1">
<b>上山打老虎</b>
<ul>
<li id="4">
<b>啦啦啦啦啦</b>
</li>
<li id="3">
<b>老虎不在家</b>
</li>
</ul>
</li>
</ul></code>
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
<code> 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
.
.
.</code>
希望通过一次查询
<code>mysql_query("SELECT id,txt,parent FROM t1 ORDER BY id DESC")</code>
经过php对数据的重新排列
<code>这里的代码应该怎么写？？？</code>
得到如下结构的数据
<code><ul>
<li id="6">
<b>嗯嗯恩恩恩</b>
</li>
<li id="2">
<b>一二三四五</b>
<ul>
<li id="5">
<b>啊啊啊啊啊</b>
</li>
</ul>
</li>
<li id="1">
<b>上山打老虎</b>
<ul>
<li id="4">
<b>啦啦啦啦啦</b>
</li>
<li id="3">
<b>老虎不在家</b>
</li>
</ul>
</li>
</ul></code>
这个过程中的PHP处理代码或者算法应该怎么写？求指点。
<code><?php header('Content-Type: text/plain;charset=utf-8');
$arr = array(
array(1,'Web Server',0),
array(2,'Database', 0),
array(3,'Nginx', 1),
array(4,'Apache', 1),
array(5,'MySQL', 2),
array(6,'Browser', 0),
);
$new = array();
foreach($arr as $v) {
if($v[2]==0) {
$new[$v[0]][$v[0]] = $v[1];
} else {
$new[$v[2]][$v[0]] = $v[1];
}
}
print_r($new);
//输出:
Array
(
[1] => Array
(
[1] => Web Server
[3] => Nginx
[4] => Apache
)
[2] => Array
(
[2] => Database
[5] => MySQL
)
[6] => Array
(
[6] => Browser
)
)</code>
Code
<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 '<pre class="brush:php;toolbar:false">';
print_r($result);
echo '';
Result
<code>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
(
)
)
)</code>
<code><?php $arr = [
[1,'Web Server',0],
[2,'Database', 0],
[3,'Nginx', 1],
[4,'Apache', 1],
[5,'MySQL', 2],
[6,'Browser', 0],
];
$new = array();
foreach($arr as $v) {
if($v[2]==0) {
$new[$v[0]]['name'] = $v[1];
}else{
$new[$v[2]]['sub'][$v[0]]['name'] = $v[1];
}
}
print_r($new);
///////
Array
(
[1] => 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
)
)</code>
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