我是PHP新手，我需要在php中将一维数组转换为多维数组
我有这样的数据，需要将其最小化如下。
Array
(
[0] => Array
(
[0] => David
[1] => School
[2] => 19
[3] => 29
)
[1] => Array
(
[0] => Paul
[1] => Home
[2] => 19
[3] => 29
)
[2] => Array
(
[0] => Paul
[1] => Cinema
[2] => 19
[3] => 29
)
[3] => Array
(
[0] => Paul
[1] => Park
[2] => 19
[3] => 29
)
[4] => Array
(
[0] => Rossie
[1] => Playground
[2] => 19
[3] => 29
)
[5] => Array
(
[0] => Rossie
[1] => Hotel
[2] => 19
[3] => 29
)
[6] => Array
(
[0] => Rossie
[1] => Hospital
[2] => 19
[3] => 29
)
)
我想将其转换为多维
Array
(
[0] => Array
(
[0] => Array
(
[0] => David
(
[0] => School
(
[0] => 19
[1] => 29
[2] => 39
[3] => 49
)
)
)
)
[1] => Array
(
[0] => Array
(
[0] => Paul
(
[0] => Home
(
[0] => 19
[1] => 29
[2] => 39
[3] => 49
)
[1] => Cinema
(
[0] => 19
[1] => 29
[2] => 39
[3] => 49
)
[1] => Park
(
[0] => 19
[1] => 29
[2] => 39
[3] => 49
)
)
)
)
[2] => Array
(
[0] => Array
(
[0] => Rossie
(
[0] => Playground
(
[0] => 19
[1] => 29
[2] => 39
[3] => 49
)
[1] => Hotel
(
[0] => 19
[1] => 29
[2] => 39
[3] => 49
)
[1] => Hospital
(
[0] => 19
[1] => 29
[2] => 39
[3] => 49
)
)
)
)
)
希望您有个好主意。但是我的函数无法正确执行此操作，或者可能还有其他方法可以更轻松地完成此操作？
感谢您的帮助。
谢谢
答案 0 :(得分：0)
以下是实现此目的的一种方法：
<?php
$arr = [array('David','School',19,29),
array('Paul','Home',19,29),
array('Paul','Cinema',19,29),
array('Paul','Park',19,29),
array('Rossie','Playground',19,29),
array('Rossie','Hotel',19,29),
array('Rossie','Hospital',19,29)];
// Get all names.
$names = array_unique(array_map(function($value){return $value[0];}, $arr));
$places = [];
// Create the multidimensional array, grouping by name.
foreach($names as $key => $name){
$tempArr = [];
foreach($arr as $record){
if($record[0] === $name){
$tempArr[][$record[1]] = array_slice($record,2);
}
}
$places[][][$name] = $tempArr;
}
print("<pre>".print_r($places,true)."</pre>");
这将返回以下结果：
Array
(
[0] => Array
(
[0] => Array
(
[David] => Array
(
[0] => Array
(
[School] => Array
(
[0] => 19
[1] => 29
)
)
)
)
)
[1] => Array
(
[0] => Array
(
[Paul] => Array
(
[0] => Array
(
[Home] => Array
(
[0] => 19
[1] => 29
)
)
[1] => Array
(
[Cinema] => Array
(
[0] => 19
[1] => 29
)
)
[2] => Array
(
[Park] => Array
(
[0] => 19
[1] => 29
)
)
)
)
)
[2] => Array
(
[0] => Array
(
[Rossie] => Array
(
[0] => Array
(
[Playground] => Array
(
[0] => 19
[1] => 29
)
)
[1] => Array
(
[Hotel] => Array
(
[0] => 19
[1] => 29
)
)
[2] => Array
(
[Hospital] => Array
(
[0] => 19
[1] => 29
)
)
)
)
)
)