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將數組分解成多維數組（parent->child->sub-child）

PHP

慕婉清6462132 2023-05-12 14:47:24

我有一個數組（$categories_final），看起來類似于：Array( [0] => Accessories/Apron [1] => Accessories/Banners [2] => Accessories/Belts [3] => Brand/Brand1 [4] => Brand/Brand2 [5] => Apparel/Men/Belts [6] => Apparel/Men/Socks [7] => Apparel/Women/Leggings)我試圖讓它看起來像這樣，所以我可以將它作為我商店的類別結構添加到數據庫中：Array( [Accessories] => Array ( [0] => Apron [1] => Banners [2] => Belts ) [Apparel] => Array ( [0] => Men => Array ( [0] => Belts [1] => Socks ) [1] => Women => Array ( [0] => Leggings ) ) ...etc這是我到目前為止所得到的，但我無法弄清楚如何在 Men/ & Women/ 下添加孩子：$categories = array();foreach ($categories_final as $cat) { $levels = explode('/', $cat); if (isset($categories[$levels[0]])) { if (!in_array($levels[1], $categories[$levels[0]])) { $categories[$levels[0]][]= $levels[1]; } } else { $categories[$levels[0]][]= $levels[1]; }}print_r($categories);再一次，我堅持如何在他們各自的父母下添加 /Belts、/Socks 和 /Leggings。任何幫助表示贊賞，謝謝！

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3 回答

慕容3067478

TA貢獻1773條經驗獲得超3個贊

由于可以有無限數量的分支，您可能應該有一個遞歸解決方案。我盡了最大努力得到了這段代碼：

$arr = ['Accessories/Apron', 'Accessories/Banners', 'Accessories/Belts','Brand/Brand1','Brand/Brand2',

'Apparel/Men/Belts', 'Apparel/Men/Socks', 'Apparel/Women/Leggings'];

$final = [];

foreach ($arr as $branch) {

$temp = branchRecursive($branch);

$final = array_merge_recursive($final, $temp);

}

function branchRecursive($branch) {

// explode only first

$newBranch = explode('/', $branch, 2);

// A leaf, no more branches

if(count($newBranch) != 2) {

return $newBranch[0];

}

$array [ $newBranch[0] ]= branchRecursive($newBranch[1]);

return $array;

}

它返回這個：

Array

(

[Accessories] => Array

(

[0] => Apron

[1] => Banners

[2] => Belts

)

[Brand] => Array

(

[0] => Brand1

[1] => Brand2

)

[Apparel] => Array

(

[Men] => Array

(

[0] => Belts

[1] => Socks

)

[Women] => Leggings

)

與您的代碼唯一不同的是

[Women] => Leggings

代替

[0] => Leggings

但我想睡覺，但我的腦袋不工作，所以如果有人能指出要改變的地方，我將不勝感激。我希望這不是什么大問題:)

反對回復 2023-05-12

慕絲7291255

TA貢獻1859條經驗獲得超6個贊

此代碼使您能夠創建任意數量的子分支。

$source = array('Accessories/Apron ' ,

'Accessories/Banners',

'Accessories/Belts',

'Brand/Brand1',

'Brand/Brand2',

'Apparel/Men/Belts',

'Apparel/Men/Socks',

'Apparel/Women/Leggings'

);

function convert($categories_final) {

$categories = array();

foreach ($categories_final as $cat) {

$levels = explode('/', $cat);

// get category

$category_name = $levels[0];

array_shift($levels);

if(!array_key_exists($category_name,$categories)) {

$categories[$category_name] = array();

}

$tmp = &$categories[$category_name] ;

foreach($levels as $index => $val){

if($index + 1 === count($levels) ){

$tmp[] = $val;

} else {

$i = find_index($tmp , $val);

if( $i == count($tmp) ) { // object not found , we create a new sub array

$tmp[] = array($val => array());

}

$tmp = &$tmp[$i][$val];

}

return $categories;

}

function find_index($array , $key) {

foreach($array as $i => $val ) {

if(is_array($val) && array_key_exists($key , $val) ){

return $i ;

}

return count($array);

}

print_r(convert($source));

這是結果

Array

(

[Accessories] => Array

(

[0] => Apron

[1] => Banners

[2] => Belts

)

[Brand] => Array

(

[0] => Brand1

[1] => Brand2

)

[Apparel] => Array

(

[0] => Array

(

[Men] => Array

(

[0] => Belts

[1] => Socks

)

[1] => Array

(

[Women] => Array

(

[0] => Leggings

)

反對回復 2023-05-12

溫溫醬

TA貢獻1752條經驗獲得超4個贊

一種方法是將數組項“轉換”為 json，然后解碼為數組。

我首先執行中間步驟，其中字符串變為無效的 json，然后 preg_replace 使內部變為{}有效[]。

然后與結果合并。

$result =[];

foreach($arr as $val){

$count = count(explode("/", $val));

$str = '{"' . str_replace('/', '":{"', $val) . '"}' . str_repeat("}", $count-1);

$json = preg_replace("/(.*)(\{)(.*?)(\})/", "$1[$3]", $str);

$result = array_merge_recursive($result, json_decode($json, true));

}

Print_r($result);

https://3v4l.org/5i3SW

反對回復 2023-05-12

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將數組分解成多維數組（parent->child->sub-child）

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