Locale::lookup

locale_lookup

(PHP 5 >= 5.3.0, PHP 7, PHP 8, PECL intl >= 1.0.0)

Locale::lookup -- locale_lookup — Searches the language tag list for the best match to the language

Description

Object-oriented style

public static Locale::lookup(
    array $languageTag,
    string $locale,
    bool $canonicalize = false,
    ?string $defaultLocale = null
): ?string

Procedural style

locale_lookup(
    array $languageTag,
    string $locale,
    bool $canonicalize = false,
    ?string $defaultLocale = null
): ?string

Searches the items in languageTag for the best match to the language range specified in locale according to RFC 4647's lookup algorithm.

Parameters

languageTag: An array containing a list of language tags to compare to locale. Maximum 100 items allowed.
locale: The locale to use as the language range when matching.
canonicalize: If true, the arguments will be converted to canonical form before matching.
defaultLocale: The locale to use if no match is found.

Return Values

The closest matching language tag or default value.

Returns null when the length of locale exceeds INTL_MAX_LOCALE_LEN.

Changelog

Version	Description
7.4.0	`defaultLocale` is nullable now.

Examples

Example #1 locale_lookup() example

<?php
$arr = array(
    'de-DEVA',
    'de-DE-1996',
    'de',
    'de-De'
);
echo locale_lookup($arr, 'de-DE-1996-x-prv1-prv2', true, 'en_US');
?>

Example #2 OO example

<?php
$arr = array(
    'de-DEVA',
    'de-DE-1996',
    'de',
    'de-De'
);
echo Locale::lookup($arr, 'de-DE-1996-x-prv1-prv2', true, 'en_US');
?>

The above example will output:

de_de_1996

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