(PHP 5 >= 5.3.0, PHP 7, PHP 8, PECL intl >= 1.0.0)
Locale::getPrimaryLanguage -- locale_get_primary_language — Gets the primary language for the input locale
面向对象风格
$locale
) : string|null过程化风格
$locale
) : string|nullGets the primary language for the input locale
localeThe locale to extract the primary language code from
The language code associated with the language.
Returns null when the length of locale exceeds INTL_MAX_LOCALE_LEN.
Example #1 locale_get_primary_language() example
<?php
echo locale_get_primary_language('zh-Hant');
?>
Example #2 OO example
<?php
echo Locale::getPrimaryLanguage('zh-Hant');
?>
以上例程会输出：
zh
The behaviour when a falsy value is passed as the $locale is undocumented, but it appears that it returns the primary language of the default system language. In my case:
Locale::getPrimaryLanguage(null);
Returns 'en'. So make sure to test $locale before passing it to the method.