Format a price based on a user's language in PHP - Formater un prix en fonction de la langue d'un utilisateur en PHP

Publié le 18 avr. 2024.

[EN] Here is a function that allows you to display a price formatted according to a user's language and which automatically adds the corresponding currency symbol. [FR] Voici une fonction qui permet d'afficher un prix formaté selon la langue d'un utilisateur et qui ajoute automatiquement le symbole monétaire correspondant.

/*
 * intl_currency( $price, $lang_locale );
 * Function to format a price based on a user's language in PHP
 * @param {int/float} $price
 * @param {string}    $lang_locale - language code to translate (en_US, fr_FR, de_DE, ...)
 * @return {string}   A price formatted according to the desired language
 */
function intl_currency( $price, $lang_locale ){

    // cast in float
    $price = (float) $price;

    // format price by language
    $formatted_price = new NumberFormatter( $lang_locale, NumberFormatter::CURRENCY );

    // return: £ 142.23 or 142,23 €, ...
    return $formatted_price->formatCurrency( $price,
                 $formatted_price->getTextAttribute(NumberFormatter::CURRENCY_CODE) );

}
/*
 * intl_currency( $price, $lang_locale );
 */

// Examples :

$currency = intl_currency( '1452.36', 'en_GB' );
echo 'English - Great Britain : '.$currency;
echo "\r\n";
$currency = intl_currency( '1452.36', 'en_US' );
echo 'English - United States : '.$currency;
echo "\r\n";
$currency = intl_currency( '1452.36', 'fr_FR' );
echo 'French - France : '.$currency;
echo "\r\n";
$currency = intl_currency( '1452.36', 'fr_CA' );
echo 'French - Canada : '.$currency;
echo "\r\n";
$currency = intl_currency( '1452.36', 'de_DE' );
echo 'Deutsch - Deutschland : '.$currency;
echo "\r\n";
$currency = intl_currency( '1452.36', 'zh-CN' );
echo 'Chinese - China : '.$currency;

// output : 
// English - Great Britain : £1,452.36
// English - United States : $1,452.36
// French - France : 1 452,36 €
// French - Canada : 1 452,36 $
// Deutsch - Deutschland : 1.452,36 €
// Chinese - China : ￥1,452.36

// Tip -> list all PHP language codes
// given by Jared at https://www.php.net/manual/en/resourcebundle.locales.php
// print_r(ResourceBundle::getLocales(''));