Thank you: this does the job.
If I may suggest, in the future release I would add, in addition to some hook and custom in admin, an option to automatically detect the languages, based on user’s browser localization.
Something like that (found in comments about http_negotiate_language
, here):
<?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 = $_SERVER['HTTP_ACCEPT_LANGUAGE'];
// standard for HTTP_ACCEPT_LANGUAGE is defined under
// https://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.4
// pattern to find is therefore something like this:
// 1#( language-range [ ";" "q" "=" qvalue ] )
// where:
// language-range = ( ( 1*8ALPHA *( "-" 1*8ALPHA ) ) | "*" )
// qvalue = ( "0" [ "." 0*3DIGIT ] )
// | ( "1" [ "." 0*3("0") ] )
preg_match_all("/(:alpha:{1,8})(-([[:alpha:]|-]{1,8}))?" .
"(\s*;\s*q\s*=\s*(1\.0{0,3}|0\.\d{0,3}))?\s*(,|$)/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;
}
?>