Is it possible to order an array alphabetically in Laravel?答案

【问题标题】：Is it possible to order an array alphabetically in Laravel?Is it possible to order an array alphabetically in Laravel?
【发布时间】：2022-12-02 03:05:27
【问题描述】：

I am new to Laravel and I was wondering if I can order the following multidimensional array with countries alphabetically? So I want all the countries inside the continents to be ordered alphabetically.

  "EU" => array:9 
    0 => "NL"
    1 => "BE"
    3 => "FR"
    4 => "DE"
    5 => "ES"
    6 => "IT"
    7 => "GB"
    8 => "TR"
    9 => "DK"
  ]
  "AS" => array:2
]

【问题讨论】：

标签： php arrays laravel alphabetical-sort

【解决方案1】：

It seems you need to sort an inner array by values. Here is a one way to do it.

$arr = [
   "EU" => [
        0 => "NL",
        1 => "BE",
        3 => "FR",
        4 => "DE",
        5 => "ES",
        6 => "IT",
        7 => "GB",
        8 => "TR",
        9 => "DK",
  ],
  "AS" => ["AB", "AA"]
];

foreach($arr as $continent => $countries) {
    asort($countries);
    $arr[$continent] = $countries;
}


var_dump($arr);

【讨论】：

Can I also remove the duplicate countries in that foreach?
@Elisaveta sure you can!. You need to change this line $arr[$continent] = $countries; to this $arr[$continent] = array_unique($countries)

【解决方案2】：

Laravel has nothing to do with these stuff. You should use PHP functions and here's an example:

$arr = [
    0 => "NL",
    1 => "BE",
    3 => "FR",
    4 => "DE",
    5 => "ES",
    6 => "IT",
    7 => "GB",
    8 => "TR",
    9 => "DK",
];

sort($arr);

print_r($arr);

The result:

Array
(
    [0] => BE
    [1] => DE
    [2] => DK
    [3] => ES
    [4] => FR
    [5] => GB
    [6] => IT
    [7] => NL
    [8] => TR
)

【讨论】：

Hey, thank you for your answer. Unfortunately, this does not work as it is multidimensional array.
What about using usort function? php.net/manual/en/function.usort.php
Still does not work, I already tried those options
Please edit your question and explain what input you have, and what output you want. This is how we can help you better.

【解决方案3】：

Since you are looking for a Laravel answer, you might be interested in the Arr::sortRecursive() helper for a short and fluent implementation. Let me demonstrate the code for your data while also expending your data a bit more to the my point across:

use IlluminateSupportArr;

$array = [
  "EU" => [
    "NL", "BE", "FR", "DE", "ES", "IT", "GB", "TR", "DK",
  ],
  "AS" => [
    "JA", "IN", "CH",
  ],
  "NA" => [
    "US", "ME", "CA",
  ],
];
 
$sorted = Arr::sortRecursive($array);

/*
[
  "AS" => [
    "CH", "IN", "JA",
  ],
  "EU" => [
    "BE", "DE", "DK", "ES", "FR", "GB", "IT", "NL", "TR",
  ],
  "NA" => [
    "CA", "ME", "US",
  ],
]
*/

【讨论】：