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@ 2022-12-01T21:47:23Z

<?php

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

foreach ($arr as &$row) {
    sort($row);
}
var_export($arr);

Output
Performance
VLD
References
Branches

var_export: documentation ( source)
sort: documentation ( source)

preferences:dark modelive previewkey bindings

35.65 ms | 405 KiB | 5 Q