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You are browsing the Symfony 4.3 documentation, which changes significantly from Symfony 3.x. If your app doesn't use Symfony 4.3 yet, browse the Symfony 3.4 documentation.

The Symfony Polyfill / Intl IDN Component

4.3 version
Maintained Unmaintained

The Symfony Polyfill / Intl IDN Component

This component provides a collection of functions related to IDN when the Intl extension is not installed.


$ composer require symfony/polyfill-intl-idn


If you install this component outside of a Symfony application, you must require the vendor/autoload.php file in your code to enable the class autoloading mechanism provided by Composer. Read this article for more details.


Once this component is installed in your application, you can use the following functions, no matter if the PHP intl extension is installed or not in your server.

Provided Functions

Symfony provides more polyfills for other classes and functions related to the Intl PHP extension: polyfill-intl-grapheme, polyfill-intl-icu, polyfill-intl-messageformatter, and polyfill-intl-normalizer.

This work, including the code samples, is licensed under a Creative Commons BY-SA 3.0 license.