我有如下所示的多維數組，我想根據[name]php 中的字段進行排序。Array( [chicago] => Array ( [community_name] => Chicago, IL [areas] => Array ( [0] => Array ( [name] => Array ( [0] => HELLO WORLD. ) ) [1] => Array ( [name] => Array ( [0] => Hello ) ) [2] => Array ( [name] => Array ( [0] => Administration. ) ) ) ) [chicago-and-surrounding-areas] => Array ( [community_name] => Chicago (and surrounding areas), IL [areas] => Array ( [0] => Array ( [name] => Array ( [0] => Carry. ) ) [1] => Array ( [name] => Array ( [0] => Bacteria. ) ) ) )問題陳述：我想知道我需要在上面的 php 代碼中進行哪些更改，以便它根據name字段對數組進行排序。使用上面的 php 代碼，它不會對任何內容進行排序。它只是按原樣打印輸入。
1 回答
MMTTMM
TA貢獻1869條經驗 獲得超4個贊
根據您的示例，您實際上是在嘗試areas對子數組進行排序，而不是對整個父數組進行排序。因此，您需要依次循環每個子數組并分別對它們進行排序。
$array = [
'chicago' => [
'community_name' => 'Chicago, IL',
'areas' => [
[
'name' => ['HELLO WORLD.']
],
[
'name' => ['Hello'],
],
[
'name' => ['Administration.'],
],
],
],
'chicago-and-surrounding-areas' => [
'community_name' => 'Chicago (and surrounding areas), IL',
'areas' => [
[
'name' => ['Carry.']
],
[
'name' => ['Bacteria.'],
],
],
],
'cambridge-chicago' => [
'community_name' => 'Cambridge (Chicago), IL',
'areas' => [
[
'name' => ['Responsibility.']
],
[
'name' => ['Bacteria'],
],
],
],
];
foreach ($array as &$locality) {
usort($locality['areas'], function ($a, $b) {
return $a['name'][0] <=> $b['name'][0];
});
}
var_dump($array);
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