PHP Manual: Gets the primary language for the input locale

Object-oriented style

public static stringnull Locale::getPrimaryLanguage(string $locale)

Procedural style

stringnull locale_get_primary_language(string $locale)

Gets the primary language for the input locale

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');
?>

The above example will output:

zh

Locale::getPrimaryLanguage