php递归遍历多维数组,合并重复值并记录重复次数

header('Content-type: text/html; charset=utf-8');//以下是原始数组$array = array(	0=>array(		0=>array(			'text' => '体育',			'children' => array(				0=>array(					'text' => '篮球',					'grade' => '1'				),				1=>array(					'text' => '足球',					'grade' => '3'				)			)		),		1=>array(			'text' => '音乐',			'children' => array(				0=>array(					'text' => '唱歌',					'children' => array(						0=>array(							'text' => '儿歌三百首',							'grade' => '1'						)					)				),				1=>array(					'text' => '跳舞',					'grade' => '3'				)			)		)	),	1=>array(		0=>array(			'text' => '体育',			'children' => array(				0=>array(					'text' => '篮球',					'grade' => '2'				),				1=>array(					'text' => '排球',					'grade' => '5'				)			)		),		1=>array(			'text' => '音乐',			'children' => array(				0=>array(					'text' => '唱歌',					'children' => array(						0=>array(							'text' => '儿歌三百首',							'grade' => '4'						)					)				)			)		)	),);//要求：递归遍历原始多维数组，将重复键值合并并累加grade值，以及记录重复次数。如：体育->篮球,经过处理后grade值为1+2=3,重复个数则为2(注:多维数组层级不定)//以下是想要的到的结果$newarray = array(	0=>array(		0=>array(			'text' => '体育',			'children' => array(				0=>array(					'text' => '篮球',					'grade' => '3',					'count' => '2'				),				1=>array(					'text' => '足球',					'grade' => '3',					'count' => '1'				),				2=>array(					'text' => '排球',					'grade' => '5',					'count' => '1'				)			)		),		1=>array(			'text' => '音乐',			'children' => array(				0=>array(					'text' => '唱歌',					'children' => array(						0=>array(							'text' => '儿歌三百首',							'grade' => '5',							'count' => '2'						)					)				),				1=>array(					'text' => '跳舞',					'grade' => '3',					'count' => '1'				)			)		)	));

回复讨论(解决方案)

貌似有性，等高手解决了，学习学习

不需要递归吧。双重循环完全可以搞定。

这就是基础了

不需要递归吧。双重循环完全可以搞定。

但数组的层级是不一定的，实际上有多大5至6级

不需要递归吧。双重循环完全可以搞定。

但数组的层级是不一定的，实际上有多大5至6级

但数组的层级是不一定的，实际上有多达5至6级

你的数据是从哪里来的？
正着做很简单，像你这样反着做是有些难度的
别着急，有空帮你看看

昨天晚上研究这个题目6个小时，最后抱着参考手册找各种数组函数，结果还是没做出来。

你的数据是从哪里来的？
正着做很简单，像你这样反着做是有些难度的
别着急，有空帮你看看

多谢版主

昨天晚上研究这个题目6个小时，最后抱着参考手册找各种数组函数，结果还是没做出来。

不才，我花了2天时间也还是没能找着出路

给个思路：先降维

function untree($ar, $key='children', $deep=0, $paren='') {  $res = array();  foreach((array)$ar as $v) {    if(is_numeric(key($v))) {      $res = array_merge($res, untree($v, $key, $deep+1, $paren));      continue;    }    $v['deep'] = $deep;    $v['paren'] = $paren;    if(isset($v[$key])) {      $t = $v[$key];      $pa = $v['text'];      unset($v[$key]);    }    $res[] = $v;    if(! empty($t)) $res = array_merge($res, untree($t, $key, $deep+1, $pa));  }  return $res;}

print_r(untree($array));
得
Array
(
[0] => Array
(
[text] => 体育
[deep] => 1
[paren] =>
)

[1] => Array
(
[text] => 篮球
[grade] => 1
[deep] => 2
[paren] => 体育
)

[2] => Array
(
[text] => 足球
[grade] => 3
[deep] => 2
[paren] => 体育
)

[3] => Array
(
[text] => 音乐
[deep] => 1
[paren] =>
)

[4] => Array
(
[text] => 唱歌
[deep] => 2
[paren] => 音乐
)

[5] => Array
(
[text] => 儿歌三百首
[grade] => 1
[deep] => 3
[paren] => 唱歌
)

[6] => Array
(
[text] => 跳舞
[grade] => 3
[deep] => 2
[paren] => 音乐
)

[7] => Array
(
[text] => 儿歌三百首
[grade] => 1
[deep] => 3
[paren] => 唱歌
)

[8] => Array
(
[text] => 体育
[deep] => 1
[paren] =>
)

[9] => Array
(
[text] => 篮球
[grade] => 2
[deep] => 2
[paren] => 体育
)

[10] => Array
(
[text] => 排球
[grade] => 5
[deep] => 2
[paren] => 体育
)

[11] => Array
(
[text] => 音乐
[deep] => 1
[paren] =>
)

[12] => Array
(
[text] => 唱歌
[deep] => 2
[paren] => 音乐
)

[13] => Array
(
[text] => 儿歌三百首
[grade] => 4
[deep] => 3
[paren] => 唱歌
)

)

你的数据是从哪里来的？
正着做很简单，像你这样反着做是有些难度的
别着急，有空帮你看看

数据是通过另一个封装函数返回的（我不能修改封装函数）

给个思路：先降维

function untree($ar, $key='children', $deep=0, $paren='') {  $res = array();  foreach((array)$ar as $v) {    if(is_numeric(key($v))) {      $res = array_merge($res, untree($v, $key, $deep+1, $paren));      continue;    }    $v['deep'] = $deep;    $v['paren'] = $paren;    if(isset($v[$key])) {      $t = $v[$key];      $pa = $v['text'];      unset($v[$key]);    }    $res[] = $v;    if(! empty($t)) $res = array_merge($res, untree($t, $key, $deep+1, $pa));  }  return $res;}

print_r(untree($array));
得
Array
(
    [0] => Array
        (
            [text] => 体育
            [deep] => 1
            [paren] => 
        )

    [1] => Array
        (
            [text] => 篮球
            [grade] => 1
            [deep] => 2
            [paren] => 体育
        )

    [2] => Array
        (
            [text] => 足球
            [grade] => 3
            [deep] => 2
            [paren] => 体育
        )

    [3] => Array
        (
            [text] => 音乐
            [deep] => 1
            [paren] => 
        )

    [4] => Array
        (
            [text] => 唱歌
            [deep] => 2
            [paren] => 音乐
        )

    [5] => Array
        (
            [text] => 儿歌三百首
            [grade] => 1
            [deep] => 3
            [paren] => 唱歌
        )

    [6] => Array
        (
            [text] => 跳舞
            [grade] => 3
            [deep] => 2
            [paren] => 音乐
        )

    [7] => Array
        (
            [text] => 儿歌三百首
            [grade] => 1
            [deep] => 3
            [paren] => 唱歌
        )

    [8] => Array
        (
            [text] => 体育
            [deep] => 1
            [paren] => 
        )

    [9] => Array
        (
            [text] => 篮球
            [grade] => 2
            [deep] => 2
            [paren] => 体育
        )

    [10] => Array
        (
            [text] => 排球
            [grade] => 5
            [deep] => 2
            [paren] => 体育
        )

    [11] => Array
        (
            [text] => 音乐
            [deep] => 1
            [paren] => 
        )

    [12] => Array
        (
            [text] => 唱歌
            [deep] => 2
            [paren] => 音乐
        )

    [13] => Array
        (
            [text] => 儿歌三百首
            [grade] => 4
            [deep] => 3
            [paren] => 唱歌
        )

)

其实原始数组有记录id ,pid值的

那你就把数据特完整了

$array=array(    '0' => array(            '0' => array(                    'id' => 87073074,                    'pid' => 0,                    'text' => '白田最新??',                    'children' => array(                            '0' => array(                                    'id' => 67852256,                                    'pid' => 87073074,                                    'text' => '??知?',                                    'children' => array(                                            '0' => array(                                                    'id' => 44740741,                                                    'pid' => 67852256,                                                    'text' => '?能?健康',                                                    'children' => array(                                                            '0' => array(                                                                    'id' => 66256396,                                                                    'pid' => 44740741,                                                                    'text' => '小肌肉',                                                                    'children' => array(                                                                            '0' => array(                                                                                    'id' => 71852852,                                                                                    'pid' => 66256396,                                                                                    'text' => '掌握?手??能力',                                                                                    'children' => array(                                                                                            '0' => array(                                                                                                    'id' => 84741741,                                                                                                    'text' => '能摺?包',                                                                                                    'grade' => 1                                                                                                )                                                                                        )                                                                                )                                                                        )                                                                )                                                        )                                                ),                                            '1' => array(                                                    'id' => 32518528,                                                    'pid' => 67852256,                                                    'text' => '?文',                                                    'children' => array(                                                            '0' => array(                                                                    'id' => 18185185,                                                                    'pid' => 32518528,                                                                    'text' => '?',                                                                    'children' => array(                                                                            '0' => array(                                                                                    'id' => 35256896,                                                                                    'pid' => 18185185,                                                                                    'text' => '能理解故事?容要?',                                                                                    'children' => array(                                                                                            '0' => array(                                                                                                    'id' => 69295296,                                                                                                    'text' => '能理解故事?容要?',                                                                                                    'grade' => 1                                                                                                )                                                                                        )                                                                                ),                                                                            '1' => array(                                                                                    'id' => 54740741,                                                                                    'pid' => 18185185,                                                                                    'text' => '能\'?\',指示?行??和活?',                                                                                    'children' => array(                                                                                            '0' => array(                                                                                                    'id' => 93629639,                                                                                                    'text' => '能\'?\',指示?行活?和??',                                                                                                    'grade' => 1                                                                                                )                                                                                        )                                                                                )                                                                        )                                                                )                                                        )                                                )                                        )                                )                        )                )        ),     '1' => array(            '0' => array(                    'id' => 87073074,                    'pid' => 0,                    'text' => '白田最新??',                    'children' => array(                            '0' => array(                                    'id' => 67852256,                                    'pid' => 87073074,                                    'text' => '??知?',                                    'children' => array(                                            '0' => array(                                                    'id' => 44740741,                                                    'pid' => 67852256,                                                    'text' => '?能?健康',                                                    'children' => array(                                                            '0' => array(                                                                    'id' => 66256396,                                                                    'pid' => 44740741,                                                                    'text' => '小肌肉',                                                                    'children' => array(                                                                            '0' => array(                                                                                    'id' => 71852852,                                                                                    'pid' => 66256396,                                                                                    'text' => '掌握?手??能力',                                                                                    'children' => array(                                                                                            '0' => array(