init

lib/PhpSpreadsheet/Style/NumberFormat/Wizard/Locale.php

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+<?php
+
+namespace PhpOffice\PhpSpreadsheet\Style\NumberFormat\Wizard;
+
+use NumberFormatter;
+use PhpOffice\PhpSpreadsheet\Exception;
+
+final class Locale
+{
+    /**
+     * Language code: ISO-639 2 character, alpha.
+     * Optional script code: ISO-15924 4 alpha.
+     * Optional country code: ISO-3166-1, 2 character alpha.
+     * Separated by underscores or dashes.
+     */
+    public const STRUCTURE = '/^(?P<language>[a-z]{2})([-_](?P<script>[a-z]{4}))?([-_](?P<country>[a-z]{2}))?$/i';
+
+    private NumberFormatter $formatter;
+
+    public function __construct(?string $locale, int $style)
+    {
+        if (class_exists(NumberFormatter::class) === false) {
+            throw new Exception();
+        }
+
+        $formatterLocale = str_replace('-', '_', $locale ?? '');
+        $this->formatter = new NumberFormatter($formatterLocale, $style);
+        if ($this->formatter->getLocale() !== $formatterLocale) {
+            throw new Exception("Unable to read locale data for '{$locale}'");
+        }
+    }
+
+    public function format(bool $stripRlm = true): string
+    {
+        $str = $this->formatter->getPattern();
+
+        return ($stripRlm && str_starts_with($str, "\xe2\x80\x8f")) ? substr($str, 3) : $str;
+    }
+}