Error: Symfony\Polyfill\Intl\Icu\Locale::setDefault() Not Implemented

[igor-jean]

I encountered an error while trying to run the Symfony project. The error message states:

"The Symfony\Polyfill\Intl\Icu\Locale::setDefault() is not implemented. Please install the "intl" extension for full localization capabilities."

Installation Procedure Used:

I used option 2 for installation:

bash
Copy code
You can create a new project based on the Symfony Demo project...
composer create-project symfony/symfony-demo my_project

...or you can clone the code repository and install its dependencies
git clone https://github.com/symfony/demo.git my_project
cd my_project/
composer install
Server Launch Behavior:

When I launch the server using symfony serve, here's what happens:

[igor-jean]

I just tried again, it doesn't work. I thinking it was the location.I am in France and when I launch the server the URL address appears like this: http://127.0.0.1:8000/fr
So I tried to change the address to http://127.0.0.1:8000/en, and I managed to join the demo.

[derrabus]

For the best experience, you should really install the INTL extension, as the error message suggests.

---

Regarding the issue, I'm unsure how we should tackle it. I basically see two options:

• Document ext-intl as a requirement in composer.json of the demo app.
• Send a PR to Symfony to ignore this error in the locale switcher.

[stof]

Symfony should ignore this in the LocaleSwitcher, as already done in \Symfony\Component\HttpFoundation\Request::setLocale