在PHP中按字母的字母顺序对多维数组进行排序

问题描述：

我有一个这样的数组，带有字母键:

I have an array like this with alphabetical keys :

Array
(
    [0] => Array
        (
            [UserID] => 1
            [EmailAddress] => user5@gmail.com
            [TransID] => fjhf8f7848
        )
    [1] => Array
        (
            [UserID] => 1
            [EmailAddress] => johndoe@gmail.com
            [TransID] => dfsdhsdu78
        )

)

我想按字母的字母顺序对该数组排序. 预期输出为:

I want to sort this array in alphabetical order of the keys. Expected output is :

Array
(
    [0] => Array
        (
            [EmailAddress] => user5@gmail.com
            [TransID] => fjhf8f7848
            [UserID] => 1
        )
    [1] => Array
        (
            [EmailAddress] => johndoe@gmail.com
            [TransID] => dfsdhsdu78
            [UserID] => 2
        )

)

我尝试了各种数组排序功能，但它们返回空白.

I tried various array sort functions but they return blank.

如何使用字母键按字母顺序对这样的数组进行排序?

How do I sort such a array with alphabetical keys in alphabetic order?

答

您可以使用array_map和ksort，

You can use array_map and ksort,

$result = array_map(function(&$item){
    ksort($item); // sort by key
    return $item;
}, $arr);

演示.

使用foreach循环，

Using foreach loop,

foreach($arr as &$item){
    ksort($item);
}

编辑
在这种情况下，您可以使用

EDIT
In that case you can use,

foreach($arr as &$item){
    uksort($item, function ($a, $b) {
      $a = strtolower($a); // making cases linient and then compare
      $b = strtolower($b);
      return strcmp($a, $b); // then compare
    });
}

演示

输出

Array
(
    [0] => Array
        (
            [EmailAddress] => user5@gmail.com
            [TransID] => fjhf8f7848
            [UserID] => 1
        )

    [1] => Array
        (
            [EmailAddress] => johndoe@gmail.com
            [TransID] => dfsdhsdu78
            [UserID] => 1
        )

)

在PHP中按字母的字母顺序对多维数组进行排序

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