[php-src] Issue #20393: Intl::composeLocale does not consider subtags
| From: | frederikbosch | Date: | Wed, 05 Nov 2025 08:56:12 +0000 |
| Subject: | [php-src] Issue #20393: Intl::composeLocale does not consider subtags | ||
| Groups: | php.bugs | ||
| Request: | Send a blank email to php-bugs+get-251175@lists.php.net to get a copy of this message | ||
Issue: https://github.com/php/php-src/issues/20393
Author: frederikbosch
### Description
The following code:
```php
<?php
$first = 'en_US@timezone=Europe/Amsterdam';
$second = 'nl_NL';
var_dump(\Locale::parseLocale($first));
var_dump(\Locale::getKeywords($first));
var_dump(\Locale::parseLocale($second));
var_dump(\Locale::getKeywords($second));
$merged = [
...\Locale::parseLocale($first),
...\Locale::getKeywords($first) ?? [],
...\Locale::parseLocale($second),
...\Locale::getKeywords($second) ?? [],
];
var_dump($merged);
var_dump(\Locale::composeLocale($merged));
$newSynax = 'en_US-u-tz-nlams';
var_dump(\Locale::parseLocale($newSynax));
var_dump(\Locale::getKeywords($newSynax));
```
Resulted in this output:
```
array(2) {
["language"]=>
string(2) "en"
["region"]=>
string(2) "US"
}
array(1) {
["timezone"]=>
string(16) "Europe/Amsterdam"
}
array(2) {
["language"]=>
string(2) "nl"
["region"]=>
string(2) "NL"
}
NULL
array(3) {
["language"]=>
string(2) "nl"
["region"]=>
string(2) "NL"
["timezone"]=>
string(16) "Europe/Amsterdam"
}
string(5) "nl_NL"
array(2) {
["language"]=>
string(2) "en"
["region"]=>
string(2) "US"
}
NULL
```
But I expected this output instead:
```
array(2) {
["language"]=>
string(2) "en"
["region"]=>
string(2) "US"
}
array(1) {
["timezone"]=>
string(16) "Europe/Amsterdam"
}
array(2) {
["language"]=>
string(2) "nl"
["region"]=>
string(2) "NL"
}
NULL
array(3) {
["language"]=>
string(2) "nl"
["region"]=>
string(2) "NL"
["timezone"]=>
string(16) "Europe/Amsterdam"
}
string(5) "nl_NL@timezone=Europe/Amsterdam"
array(2) {
["language"]=>
string(2) "en"
["region"]=>
string(2) "US"
}
array(1) {
["timezone"]=>
string(16) "Europe/Amsterdam"
}
```
The reasoning behind this, as the example shows, is that I try to activate a new
language and region while maintaining the other subtags.
### PHP Version
```plain
PHP 8.2-8.5 and master
```
### Operating System
_No response_