平面數組到嵌套數組
[英]Flat array to nested array
問題描述
我有以下數組，是否有任何內置庫或開放源代碼將路徑/深度轉換為嵌套數組？ 可以有x深度，盡管現在只有2。 我是否只需要刪除{}並分解路徑並執行遞歸功能？ 如果這樣的話，僅檢索父ID會不會更容易，那么深度使用什么呢？
Array
(
[0] => Array
(
[id] => 1
[message] => In hac habitasse platea dictumst
[author] =>
[path] => {1}
[depth] => 1
)
[1] => Array
(
[id] => 19
[message] => Pellentesque et sapien pulvinar consectetur
[author] =>
[path] => {1,19}
[depth] => 2
)
[2] => Array
(
[id] => 20
[message] => Eros diam egestas libero eu vulputate risus
[author] =>
[path] => {1,20}
[depth] => 2
)
[3] => Array
(
[id] => 73
[message] => Lorem ipsum dolor sit amet consectetur adipiscing elit
[author] =>
[path] => {1,73}
[depth] => 2
)
[4] => Array
(
[id] => 2
[message] => Pellentesque vitae velit ex
[author] =>
[path] => {2}
[depth] => 1
)
[5] => Array
(
[id] => 17
[message] => Lorem ipsum dolor sit amet consectetur adipiscing elit
[author] =>
[path] => {2,17}
[depth] => 2
)
[6] => Array
(
[id] => 50
[message] => Ut eleifend mauris et risus ultrices egestas
[author] =>
[path] => {2,50}
[depth] => 2
)
[7] => Array
(
[id] => 57
[message] => Eros diam egestas libero eu vulputate risus
[author] =>
[path] => {2,57}
[depth] => 2
)
[8] => Array
(
[id] => 82
[message] => Nulla porta lobortis ligula vel egestas
[author] =>
[path] => {2,82}
[depth] => 2
)
[9] => Array
(
[id] => 87
[message] => Ut suscipit posuere justo at vulputate
[author] =>
[path] => {2,87}
[depth] => 2
)
[10] => Array
(
[id] => 96
[message] => Lorem ipsum dolor sit amet consectetur adipiscing elit
[author] =>
[path] => {2,96}
[depth] => 2
)
[11] => Array
(
[id] => 3
[message] => Pellentesque et sapien pulvinar consectetur
[author] =>
[path] => {3}
[depth] => 1
)
[12] => Array
(
[id] => 25
[message] => Aliquam sodales odio id eleifend tristique
[author] =>
[path] => {3,25}
[depth] => 2
)
[13] => Array
(
[id] => 27
[message] => In hac habitasse platea dictumst
[author] =>
[path] => {3,27}
[depth] => 2
)
[14] => Array
(
[id] => 36
[message] => Lorem ipsum dolor sit amet consectetur adipiscing elit
[author] =>
[path] => {3,36}
[depth] => 2
)
[15] => Array
(
[id] => 40
[message] => Urna nisl sollicitudin id varius orci quam id turpis
[author] =>
[path] => {3,40}
[depth] => 2
)
[16] => Array
(
[id] => 62
[message] => Aliquam sodales odio id eleifend tristique
[author] =>
[path] => {3,62}
[depth] => 2
)
[17] => Array
(
[id] => 66
[message] => Eros diam egestas libero eu vulputate risus
[author] =>
[path] => {3,66}
[depth] => 2
)
[18] => Array
(
[id] => 76
[message] => Ut suscipit posuere justo at vulputate
[author] =>
[path] => {3,76}
[depth] => 2
)
[19] => Array
(
[id] => 4
[message] => Ut suscipit posuere justo at vulputate
[author] =>
[path] => {4}
[depth] => 1
)
[20] => Array
(
[id] => 38
[message] => Pellentesque vitae velit ex
[author] =>
[path] => {4,38}
[depth] => 2
)
[21] => Array
(
[id] => 53
[message] => Ut suscipit posuere justo at vulputate
[author] =>
[path] => {4,53}
[depth] => 2
)
[22] => Array
(
[id] => 54
[message] => Ut eleifend mauris et risus ultrices egestas
[author] =>
[path] => {4,54}
[depth] => 2
)
[23] => Array
(
[id] => 72
[message] => Mauris dapibus risus quis suscipit vulputate
[author] =>
[path] => {4,72}
[depth] => 2
)
[24] => Array
(
[id] => 74
[message] => In hac habitasse platea dictumst
[author] =>
[path] => {4,74}
[depth] => 2
)
[25] => Array
(
[id] => 5
[message] => Pellentesque et sapien pulvinar consectetur
[author] =>
[path] => {5}
[depth] => 1
)
[26] => Array
(
[id] => 26
[message] => Mauris dapibus risus quis suscipit vulputate
[author] =>
[path] => {5,26}
[depth] => 2
)
[27] => Array
(
[id] => 52
[message] => Morbi tempus commodo mattis
[author] =>
[path] => {5,52}
[depth] => 2
)
[28] => Array
(
[id] => 58
[message] => Nulla porta lobortis ligula vel egestas
[author] =>
[path] => {5,58}
[depth] => 2
)
[29] => Array
(
[id] => 64
[message] => Ut suscipit posuere justo at vulputate
[author] =>
[path] => {5,64}
[depth] => 2
)
[30] => Array
(
[id] => 68
[message] => Lorem ipsum dolor sit amet consectetur adipiscing elit
[author] =>
[path] => {5,68}
[depth] => 2
)
[31] => Array
(
[id] => 71
[message] => Pellentesque et sapien pulvinar consectetur
[author] =>
[path] => {5,71}
[depth] => 2
)
[32] => Array
(
[id] => 81
[message] => Pellentesque et sapien pulvinar consectetur
[author] =>
[path] => {5,81}
[depth] => 2
)
[33] => Array
(
[id] => 95
[message] => Pellentesque vitae velit ex
[author] =>
[path] => {5,95}
[depth] => 2
)
[34] => Array
(
[id] => 6
[message] => Nulla porta lobortis ligula vel egestas
[author] =>
[path] => {6}
[depth] => 1
)
[35] => Array
(
[id] => 32
[message] => Sed varius a risus eget aliquam
[author] =>
[path] => {6,32}
[depth] => 2
)
[36] => Array
(
[id] => 49
[message] => Lorem ipsum dolor sit amet consectetur adipiscing elit
[author] =>
[path] => {6,49}
[depth] => 2
)
[37] => Array
(
[id] => 88
[message] => Nulla porta lobortis ligula vel egestas
[author] =>
[path] => {6,88}
[depth] => 2
)
[38] => Array
(
[id] => 89
[message] => Mauris dapibus risus quis suscipit vulputate
[author] =>
[path] => {6,89}
[depth] => 2
)
[39] => Array
(
[id] => 97
[message] => Nunc viverra elit ac laoreet suscipit
[author] =>
[path] => {6,97}
[depth] => 2
)
[40] => Array
(
[id] => 7
[message] => Eros diam egestas libero eu vulputate risus
[author] =>
[path] => {7}
[depth] => 1
)
[41] => Array
(
[id] => 21
[message] => Nulla porta lobortis ligula vel egestas
[author] =>
[path] => {7,21}
[depth] => 2
)
[42] => Array
(
[id] => 23
[message] => Aliquam sodales odio id eleifend tristique
[author] =>
[path] => {7,23}
[depth] => 2
)
[43] => Array
(
[id] => 29
[message] => Curabitur aliquam euismod dolor non ornare
[author] =>
[path] => {7,29}
[depth] => 2
)
[44] => Array
(
[id] => 41
[message] => Ut eleifend mauris et risus ultrices egestas
[author] =>
[path] => {7,41}
[depth] => 2
)
[45] => Array
(
[id] => 55
[message] => Pellentesque vitae velit ex
[author] =>
[path] => {7,55}
[depth] => 2
)
[46] => Array
(
[id] => 67
[message] => Curabitur aliquam euismod dolor non ornare
[author] =>
[path] => {7,67}
[depth] => 2
)
[47] => Array
(
[id] => 8
[message] => Ut eleifend mauris et risus ultrices egestas
[author] =>
[path] => {8}
[depth] => 1
)
[48] => Array
(
[id] => 30
[message] => Ut eleifend mauris et risus ultrices egestas
[author] =>
[path] => {8,30}
[depth] => 2
)
[49] => Array
(
[id] => 80
[message] => Morbi tempus commodo mattis
[author] =>
[path] => {8,80}
[depth] => 2
)
[50] => Array
(
[id] => 98
[message] => Eros diam egestas libero eu vulputate risus
[author] =>
[path] => {8,98}
[depth] => 2
)
[51] => Array
(
[id] => 9
[message] => Aliquam sodales odio id eleifend tristique
[author] =>
[path] => {9}
[depth] => 1
)
[52] => Array
(
[id] => 35
[message] => Aliquam sodales odio id eleifend tristique
[author] =>
[path] => {9,35}
[depth] => 2
)
[53] => Array
(
[id] => 46
[message] => Ut eleifend mauris et risus ultrices egestas
[author] =>
[path] => {9,46}
[depth] => 2
)
[54] => Array
(
[id] => 47
[message] => In hac habitasse platea dictumst
[author] =>
[path] => {9,47}
[depth] => 2
)
[55] => Array
(
[id] => 59
[message] => Mauris dapibus risus quis suscipit vulputate
[author] =>
[path] => {9,59}
[depth] => 2
)
)
1 個解決方案
解決方案1
0 2015-10-27 07:36:37
樣本無遞歸
$array = [
/* | */ ['id' => 1, 'depth' => 1],
/* |----| */ ['id' => 19, 'depth' => 2],
/* |----|----| */ ['id' => 20, 'depth' => 3],
/* |----| */ ['id' => 73, 'depth' => 2],
/* | */ ['id' => 3, 'depth' => 1],
/* |----| */ ['id' => 25, 'depth' => 2],
];
$root = new stdClass();
$bread_crumbs = [$root];
foreach ($array as $item) {
// make it object to simplify access to its parts
$object_item = (object) $item;
$expected_depth = count($bread_crumbs);
if ($object_item->depth < 1) {
throw new Exception('Depth cannot be lower than 1');
} elseif ($object_item->depth == $expected_depth) {
// doing nothing
} elseif ($object_item->depth < $expected_depth) {
// remove 'unwanted' items to make expected_depth actual
array_splice($bread_crumbs, -($expected_depth - $object_item->depth));
} else {
throw new Exception('Error cannot jump too high');
}
end($bread_crumbs)->children[] = $object_item; // object helps here
// and then just add to the end of bread_crumbs current object_item
$bread_crumbs[] = $object_item;
}
var_dump($root);
由鍵嵌套的平面數組
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