我一直在尝试将多维数组转换为单维数组。我尝试过使用 PHP 数组内置函数，但无法获得所需的输出。
问题 我有类别层次结构的多维数组，它将子类别存储在“children”键中。儿童级别没有限制，可以是任意数量。
结果 我正在尝试将此多维数组转换为单维数组，但子数组应添加在其父数组之后，并具有额外的键“级别”来显示层次结构顺序。
多维数组
$arr = [
[
"id" => 1495,
"title" => "Acoustics",
"slug" => "acoustics",
"children" => [
[
"id" => 50127,
"title" => "Acoustic Lighting",
"slug" => "acoustic-lighting",
"children" => [
[
"id" => 50131,
"title" => "Acoustic Pendant Lighting",
"slug" => "acoustic-pendant-lighting",
"children" => [],
],
],
],
[
"id" => 57168,
"title" => "Acoustic Plaster Systems",
"slug" => "acoustic-plaster-systems",
"children" => [],
],
],
],
[
"id" => 50182,
"title" => "Architecture",
"slug" => "architecture",
"children" => [
[
"id" => 1488,
"title" => "Ceilings",
"slug" => "ceilings",
"children" => [
[
"id" => 50205,
"title" => "Suspended Ceiling Systems",
"slug" => "suspended-ceiling-systems",
"children" => [
[
"id" => 56299,
"title" => "Baffles",
"slug" => "baffles",
"children" => [],
],
],
],
],
],
[
"id" => 50187,
"title" => "Doors",
"slug" => "doors",
"children" => [
[
"id" => 50188,
"title" => "Single Leaf",
"slug" => "single-leaf",
"children" => [],
],
],
],
],
],
[
"id" => 43859,
"title" => "Decor",
"slug" => "decor",
"children" => [
[
"id" => 50137,
"title" => "Art and Prints",
"slug" => "art-and-prints",
"children" => [],
],
[
"id" => 54014,
"title" => "Planters",
"slug" => "planters",
"children" => [],
],
[
"id" => 50138,
"title" => "Sculptures and Objects",
"slug" => "sculptures-and-objects",
"children" => [],
],
[
"id" => 43860,
"title" => "Wall / Ceiling Decor",
"slug" => "wall-ceiling-decor",
"children" => [
[
"id" => 43861,
"title" => "Green Walls",
"slug" => "green-walls",
"children" => [],
],
[
"id" => 50139,
"title" => "Wall Paper & Wall Coverings",
"slug" => "wall-paper-wall-coverings",
"children" => [],
],
],
],
],
],
];
一维数组，我正在尝试获取
Array
(
[0] => Array
(
[id] => 1495
[title] => Acoustics
[slug] => acoustics
[level] => 0
)
[1] => Array
(
[id] => 50127
[title] => Acoustic Lighting
[slug] => acoustic-lighting
[level] => 1
)
[2] => Array
(
[id] => 50131
[title] => Acoustic Pendant Lighting
[slug] => acoustic-pendant-lighting
[level] => 2
)
[3] => Array
(
[id] => 57168
[title] => Acoustic Plaster Systems
[slug] => acoustic-plaster-systems
[level] => 1
)
[4] => Array
(
[id] => 50182
[title] => Architecture
[slug] => architecture
[level] => 0
)
[5] => Array
(
[id] => 1488
[title] => Ceilings
[slug] => ceilings
[level] => 1
)
[6] => Array
(
[id] => 50205
[title] => Suspended Ceiling Systems
[slug] => suspended-ceiling-systems
[level] => 2
)
[7] => Array
(
[id] => 56299
[title] => Baffles
[slug] => baffles
[level] => 3
)
[8] => Array
(
[id] => 50187
[title] => Doors
[slug] => doors
[level] => 1
)
[9] => Array
(
[id] => 50188
[title] => Single Leaf
[slug] => single-leaf
[level] => 2
)
[10] => Array
(
[id] => 43859
[title] => Decor
[slug] => decor
[level] => 0
)
[11] => Array
(
[id] => 50137
[title] => Art and Prints
[slug] => art-and-prints
[level] => 1
)
[12] => Array
(
[id] => 54014
[title] => Planters
[slug] => planters
[level] => 1
)
[13] => Array
(
[id] => 50138
[title] => Sculptures and Objects
[slug] => sculptures-and-objects
[level] = 1
)
[14] => Array
(
[id] => 43860
[title] => Wall / Ceiling Decor
[slug] => wall-ceiling-decor
[level] => 1
)
[15] => Array
(
[id] => 43861
[title] => Green Walls
[slug] => green-walls
[level] => 2
)
[16] => Array
(
[id] => 50139
[title] => Wall Paper & Wall Coverings
[slug] => wall-paper-wall-coverings
[level] => 2
)
)
这是我尝试过的，
function array_flatten( $arr, $out=array() ) {
foreach( $arr as $key => $item ) {
if ( is_array( $item ) ) {
$out = array_merge( $out, array_flatten( $item ) );
} else {
$out[] = $item;
}
}
return $out;
}
$result_single = array_flatten($arr);
$result_arr = array_chunk($result_single, 3);
echo "<pre>"; print_r($result_arr); echo "</pre>";
你需要使用递归
function flattenArray($array, $level = 0, &$result = []) {
foreach ($array as $element) {
// Copy the element and add the level key to it
$flattenedElement = $element;
$flattenedElement['level'] = $level;
unset($flattenedElement['children']); // Remove children key
// Add the flattened element to the result array
$result[] = $flattenedElement;
// If there are children, recursively flatten them
if (!empty($element['children'])) {
flattenArray($element['children'], $level + 1, $result);
}
}
return $result;
}
// Your multidimensional array
$arr = [
// ... your array structure ...
];
// Flatten the array
$flattenedArray = flattenArray($arr);
// Print the result
print_r($flattenedArray);