categories.php

<?php

require "StringHelper.php";

$helper = new StringHelper();
$categories = [];

$news = new stdClass();
$news->names = ["fr" => "Actualités", "en" => "News"];
$categories[] = $news;

$sports = new stdClass();
$sports->names = ["fr" => "Sports", "en" => "Sports"];
$categories[] = $sports;

$home = new stdClass();
$home->names = ["fr" => "Accueil", "en" => "Home"];
$categories[] = $home;

$events = new stdClass();
$events->names = ["fr" => "Événements", "en" => "Events"];
$categories[] = $events;

$special = new stdClass();
$special->names = ["fr" => "Spécial", "en" => "Special"];
$categories[] = $special;

// Result alphabetically sorted in french : Accueil, Actualités, Événement, Spécial, Sports
// Result alphabetically sorted in english : Events, Home, News, Special, Sports

// Original order
var_dump($categories);

$helper->alphabeticalCompareArrayByKey($categories, 'names', 'fr');

// Alphabetical order (french) by names
var_dump($categories);