Locale::acceptFromHttp

locale_accept_from_http

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

Locale::acceptFromHttp -- locale_accept_from_http — Tries to find out best available locale based on HTTP "Accept-Language" header

说明

面向对象风格

public static Locale::acceptFromHttp(string $header): string|false

过程化风格

locale_accept_from_http(string $header): string|false

Tries to find locale that can satisfy the language list that is requested by the HTTP "Accept-Language" header.

参数

header: The string containing the "Accept-Language" header according to format in RFC 2616.

返回值

The corresponding locale identifier.

Returns false when the length of header exceeds INTL_MAX_LOCALE_LEN.

示例

示例 #1 locale_accept_from_http() example

<?php
$locale = locale_accept_from_http($_SERVER['HTTP_ACCEPT_LANGUAGE']);
echo $locale;
?>

示例 #2 OO example

<?php
$locale = Locale::acceptFromHttp($_SERVER['HTTP_ACCEPT_LANGUAGE']);
echo $locale;
?>

以上示例会输出：

en_US

参见

locale_lookup() - Searches the language tag list for the best match to the language

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User Contributed Notes 5 notes

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Adam Lange ¶

12 years ago


It's good to mention that if user browser will not send HTTP_ACCEPT_LANGUAGE, the output from:

 Locale::acceptFromHttp($_SERVER['HTTP_ACCEPT_LANGUAGE']);

Will be null. 

So remember to set up a fail over scenario!

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rasmus at mindplay dot dk ¶

7 years ago


If you're struggling to figure out how to use this function in a project that only supports certain languages, move along.

Unfortunately, this function doesn't let you specify languages supported by your project - and since the internal header parsing and negotiation logic isn't exposed in any other way, you'll most likely want to ditch this function and go for a custom implementation of the same thing:

https://github.com/willdurand/Negotiation

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bill at m$ dot com ¶

1 year ago


A nice way to detect humans. Bots usually dont have this HTTP_ACCEPT_LANGUAGE set.

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-1

bohwaz ¶

2 years ago


Please note that this method can throw IntlException in some cases when the passed header string is invalid AND you have enabled exceptions.  For example:

<?php

ini_set('intl.use_exceptions', 1);

$header = 'fr-FR,fr;q=0.9,fr;q=0.9;q=0.8,en-gb;q=0.8;q=0.7,en;q=0.6,en;q=0.7;q=0.5,*;q=0.5;q=0.4';
var_dump(locale_accept_from_http($header));

?>

Returns:

PHP Warning:  Uncaught IntlException: locale_accept_from_http: failed to find acceptable locale in ...

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mollasadra at g dot com ¶

6 years ago


Didn't see this being documented anywhere and the bug hasn't been addressed yet, so to save headache for otherS, this method does a little weird thing with these different locales:

php > echo locale_accept_from_http("zh_TW");
zh
php > echo locale_accept_from_http("zh_CN");
zh

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