* The language tag is defined by ISO 639-1
* The region tag is defined by ISO 3166-1
| public static extractLanguageAndRegionCodeFromBrowserLanguage ( string $browserLanguage, array $validLanguages = [] ) : string | ||
| $browserLanguage | string | Browser's accepted langauge header |
| $validLanguages | array | array of valid language codes. Note that if the array includes "fr" then it will consider all regional variants of this language valid, such as "fr-ca" etc. |
| return | string | 2 letter ISO 639 code 'es' (Spanish) or if found, includes the region as well: 'es-ar' |
/**
* For better privacy we store only the main language code, instead of the whole browser language string.
*
* @param $acceptLanguagesString
* @return string
*/
protected function getSingleLanguageFromAcceptedLanguages($acceptLanguagesString)
{
if (empty($acceptLanguagesString)) {
return '';
}
$languageCode = Common::extractLanguageAndRegionCodeFromBrowserLanguage($acceptLanguagesString);
return $languageCode;
}
/**
* @dataProvider getLanguageDataToExtractLanguageRegionCode
*/
public function testExtractLanguageAndRegionCodeFromBrowserLanguage($browserLanguage, $validLanguages, $expected)
{
$this->assertEquals($expected, Common::extractLanguageAndRegionCodeFromBrowserLanguage($browserLanguage, $validLanguages), "test with {$browserLanguage} failed, expected {$expected}");
}
