[php-src] Issue #12282: IntlDateFormatter returns incorrect week number for an invalid locale (and doesn't throw an exception either)
| From: | campbell-m | Date: | Sat, 23 Sep 2023 10:14:01 +0000 |
| Subject: | [php-src] Issue #12282: IntlDateFormatter returns incorrect week number for an invalid locale (and doesn't throw an exception either) | ||
| Groups: | php.bugs | ||
| Request: | Send a blank email to php-bugs+get-245421@lists.php.net to get a copy of this message | ||
Issue: https://github.com/php/php-src/issues/12282
Author: campbell-m
### Description
The following code:
```php
<?php
$date = DateTimeImmutable::createFromFormat('Y-m-d', '2023-09-23', new
DateTimeZone('Europe/London'));
foreach (['en', 'xx'] as $locale)
{
$formatter = new IntlDateFormatter(
$locale,
IntlDateFormatter::FULL,
IntlDateFormatter::FULL,
null,
null,
'w'
);
echo "Locale: $locale, Week number: " . $formatter->format($date) .
"<br>\n";
}
```
Resulted in this output:
```
Locale: en, Week number: 38
Locale: xx, Week number: 39
```
But I expected this output instead:
```
Locale: en, Week number: 38
Locale: xx, Week number: 38
```
or else for an exception to be thrown when trying to use 'xx'.
This problem happens on all versions of PHP and all operating systems I have tested.
### PHP Version
PHP 8.3.0RC2
### Operating System
Windows NT 10.0 build 22621 (Windows 11) AMD64