106 lines
3.1 KiB
PHP
106 lines
3.1 KiB
PHP
|
<?php
|
||
|
|
/**
|
||
|
|
* This class is used to negotiate language displayed to user.
|
||
|
|
* Reads browser preferences and chooses the best language from list
|
||
|
|
*/
|
||
|
|
class LocaleNegotiator
|
||
|
|
{
|
||
|
|
private $accepted_langs = [];
|
||
|
|
private $default_language;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* This method scans for languages and creates a list of language and its name (localized ofc.)
|
||
|
|
* @param String $default_language language displayed to user in case no suitable lang is found
|
||
|
|
*/
|
||
|
|
function __construct($default_language)
|
||
|
|
{
|
||
|
|
$tmp = glob(__DIR__ . '/locale/*' , GLOB_ONLYDIR);
|
||
|
|
$this->default_language = $default_language;
|
||
|
|
//Works only if the server supports the locale
|
||
|
|
//This basically means $accepted_langs[<lang_code>] = "<lang name>";
|
||
|
|
foreach ($accepted_langs as $key => $value) {
|
||
|
|
$this->accepted_langs[basename($value)] = self::mb_ucfirst(locale_get_display_language($lang, $lang));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns list of accepted langs so it can be reused for rendering language list for switching...
|
||
|
|
*/
|
||
|
|
public function get_accepted_langs(){
|
||
|
|
return $this->accepted_langs;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* This methid does ucfirst() on multibyte encodings like UTF-8 - good for edge cases when locale starts with Č or similar.
|
||
|
|
* @param String $string string
|
||
|
|
* @return String string with first char uppercase
|
||
|
|
*/
|
||
|
|
private static function mb_ucfirst($string)
|
||
|
|
{
|
||
|
|
return mb_strtoupper(mb_substr($string, 0, 1)).mb_strtolower(mb_substr($string, 1));
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* This method does the actual negotiation. It has override parameter in case user wants to switch
|
||
|
|
* languages.
|
||
|
|
* @param String $override adds language to list of preffered languages with highest priority
|
||
|
|
* @return String language code that matched best with browser preferences
|
||
|
|
*/
|
||
|
|
public function negotiate($override = null){
|
||
|
|
$langs = [];
|
||
|
|
|
||
|
|
if (isset($_SERVER['HTTP_ACCEPT_LANGUAGE'])) {
|
||
|
|
preg_match_all('/([a-z]{1,8}(-[a-z]{1,8})?)\s*(;\s*q\s*=\s*(1|0\.[0-9]+))?/i', $_SERVER['HTTP_ACCEPT_LANGUAGE'], $lang_parse);
|
||
|
|
|
||
|
|
if (count($lang_parse[1])) {
|
||
|
|
$langs = array_combine($lang_parse[1], $lang_parse[4]);
|
||
|
|
|
||
|
|
foreach ($langs as $lang => $val) {
|
||
|
|
//If browser didn't send quality of language, it is 1 by default
|
||
|
|
if ($val === '') $langs[$lang] = 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (isset($override))
|
||
|
|
{
|
||
|
|
//More important than the best lang of browser
|
||
|
|
$langs[$override] = 2;
|
||
|
|
}
|
||
|
|
|
||
|
|
arsort($langs, SORT_NUMERIC);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
//So we have lang code as value
|
||
|
|
$langs = array_flip($langs);
|
||
|
|
//False unless we set it, so we know to set default locale
|
||
|
|
$best_match = false;
|
||
|
|
//So we have also lang code as value
|
||
|
|
$accepted_langs = array_flip($this->accepted_langs);
|
||
|
|
foreach ($langs as $lang) {
|
||
|
|
if (strlen($lang)>2){
|
||
|
|
if (in_array($lang, $accepted_langs)){
|
||
|
|
$best_match = $lang;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}else{
|
||
|
|
$possible = array_filter($accepted_langs, function($key) {
|
||
|
|
global $lang;
|
||
|
|
return strpos($key, $lang) === 0;
|
||
|
|
});
|
||
|
|
|
||
|
|
if (count($possible)){
|
||
|
|
$best_match = $possible[0];
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if ($best_match === false){
|
||
|
|
$best_match = $this->default_language;
|
||
|
|
}
|
||
|
|
|
||
|
|
return $best_match;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|