HTTP 函数
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http_negotiate_language

(PECL pecl_http >= 0.1.0)

http_negotiate_language — Negotiate client's preferred language

说明

string http_negotiate_language ( array $supported [, array &$result ] )

This function negotiates the clients preferred language based on its Accept-Language HTTP header. The qualifier is recognized and languages without qualifier are rated highest. The qualifier will be decreased by 10% for partial matches (i.e. matching primary language).

参数

supported

array containing the supported languages as values

result

will be filled with an array containing the negotiation results

返回值

Returns the negotiated language or the default language (i.e. first array entry) if none match.

范例

Example #1 Using http_negotiate_language()

<?php
$langs = array(
        'en-US',// default
        'fr',
        'fr-FR',
        'de',
        'de-DE',
        'de-AT',
        'de-CH',
);

include './langs/'. http_negotiate_language($langs, $result) .'.php';

print_r($result);
?>

HTTP 函数
在线手册：中文 英文
PHP手册
PHP手册 - N: Negotiate client's preferred language

用户评论:

sh1nto at eveni dot de (09-Mar-2009 06:49)

There is an typo in your function.

You should replace $languageprefix by $langprefix.

Thanks very much for that function!

Anonymous (03-Nov-2008 11:23)

as I don't have this function available I tried to write it myself. Maybe useful for someone else, too.

<?php
/*
  determine which language out of an available set the user prefers most
 
  $available_languages        array with language-tag-strings (must be lowercase) that are available
  $http_accept_language    a HTTP_ACCEPT_LANGUAGE string (read from $_SERVER['HTTP_ACCEPT_LANGUAGE'] if left out)
*/
function prefered_language ($available_languages,$http_accept_language="auto") {
    // if $http_accept_language was left out, read it from the HTTP-Header
    if ($http_accept_language == "auto") $http_accept_language = $_SERVER['HTTP_ACCEPT_LANGUAGE'];

    // standard  for HTTP_ACCEPT_LANGUAGE is defined under
    // http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.4
    // pattern to find is therefore something like this:
    //    1#( language-range [ ";" "q" "=" qvalue ] )
    // where:
    //    language-range  = ( ( 1*8ALPHA *( "-" 1*8ALPHA ) ) | "*" )
    //    qvalue         = ( "0" [ "." 0*3DIGIT ] )
    //            | ( "1" [ "." 0*3("0") ] )
    preg_match_all("/([[:alpha:]]{1,8})(-([[:alpha:]|-]{1,8}))?" .
                   "(\s*;\s*q\s*=\s*(1\.0{0,3}|0\.\d{0,3}))?\s*(,|$)/i",
                   $http_accept_language, $hits, PREG_SET_ORDER);

    // default language (in case of no hits) is the first in the array
    $bestlang = $available_languages[0];
    $bestqval = 0;

    foreach ($hits as $arr) {
        // read data from the array of this hit
        $langprefix = strtolower ($arr[1]);
        if (!empty($arr[3])) {
            $langrange = strtolower ($arr[3]);
            $language = $langprefix . "-" . $langrange;
        }
        else $language = $langprefix;
        $qvalue = 1.0;
        if (!empty($arr[5])) $qvalue = floatval($arr[5]);
     
        // find q-maximal language 
        if (in_array($language,$available_languages) && ($qvalue > $bestqval)) {
            $bestlang = $language;
            $bestqval = $qvalue;
        }
        // if no direct hit, try the prefix only but decrease q-value by 10% (as http_negotiate_language does)
        else if (in_array($languageprefix,$available_languages) && (($qvalue*0.9) > $bestqval)) {
            $bestlang = $languageprefix;
            $bestqval = $qvalue*0.9;
        }
    }
    return $bestlang;
}
?>