Get currency ISO 4217 code based on locale - php

Question

Say, if I parse HTTP Accept-Language header with Locale::acceptFromHttp is there an easy and reliable way to get user's preferred currency based on this locale identifier? Like "USD" for "en-US".
I wish there was a way to do this with PHP intl extension but so far was unable to find my answer in the manual. I saw Zend Framework can do this with Zend_Currency but it's just too bloated for my particular software.
Any other libs or ways of achieving this? Since there must be a lot of locale identifiers a simple switch is a bit of overkill.

Answer 1

You can do this in both PHP 4 and PHP 5 using setlocale() and localeconv():
$locale = Locale::acceptFromHttp($_SERVER['HTTP_ACCEPT_LANGUAGE']);
setlocale(LC_MONETARY, $locale);
print_r(localeconv());
Sample output:
Array
(
[decimal_point] => .
[thousands_sep] =>
[int_curr_symbol] => EUR
[currency_symbol] => €
[mon_decimal_point] => ,
[mon_thousands_sep] =>
[positive_sign] =>
[negative_sign] => -
[int_frac_digits] => 2
[frac_digits] => 2
[p_cs_precedes] => 1
[p_sep_by_space] => 1
[n_cs_precedes] => 1
[n_sep_by_space] => 1
[p_sign_posn] => 1
[n_sign_posn] => 2
[grouping] => Array
(
)
[mon_grouping] => Array
(
[0] => 3
[1] => 3
)
)
The ISO 4217 code is contained within the resulting array's int_curr_symbol key.

Answer 2

A bit late but you can get it with \NumberFormatter:
<?php
$currencyPerLocale = array_reduce(
\ResourceBundle::getLocales(''),
function (array $currencies, string $locale) {
$currencies[$locale] = \NumberFormatter::create(
$locale,
\NumberFormatter::CURRENCY
)->getTextAttribute(\NumberFormatter::CURRENCY_CODE);
return $currencies;
},
[]
);