Any news here? Could someone please say "yay" or "nay" so I can go ahead and implement it or drop the issue?

Hello @elHornair, thank you for opening this issue.

I don't really understand the need to set the placeholder disabled, because in cases where the choice is single (expanded or not), we have to be able to select it to unselect the other choices.

Such feature concerns only multiple choices, but placeholder is not used for multiple choices (ref https://github.com/symfony/symfony/blob/master/src/Symfony/Component/Form/Extension/Core/Type/ChoiceType.php#L295).

Anyway, in very specific cases like that, I would go by setting the placeholder option from the type to false and adding a disabled input hardcoded in a theme.

If you really need wide support in your app before it's in the core, you can easily create an extension for the ChoiceType to add an option, let's say disable_placeholder, and hook in buildForm() to add something like:

if ($options['expanded'] && options['disable_placeholder'] && $builder->has('placeholder')) {
    $builder->get('placeholder')->setDisabled(true);
}

I'm not sure that handling this globally in the framework is worth it so I'm waiting for more feedback.

Thanks for your reply @HeahDude.

we have to be able to select it to unselect the other choices

That's the thing: if placeholder_in_choices is false, we don't want the user to unselect their choice, because this would lead to a validation error anyway (thus, my suggestion #2).

Also, thanks for your two suggestion - Both of these would work for me as a workaround. However I'd rather fix it in the core as others might benefit from it as well

Thank you for this suggestion.
There has not been a lot of activity here for a while. Would you still like to see this feature?

Hello? This issue is about to be closed if nobody replies.

I think adding something like a placeholder_attr option might be possible. @elHornair Would that satisfy your needs?

@xabbuh Hi! Sorry, I'm not actively using Symfony anymore and I don't remember what this issue was originally about. As far as I'm concerned the issue can either be closed or fixed in any way you see fit :)

Thank you for the feedback. I am closing here then. We can consider to reopen if someone runs into it again in the future.

Hello, for me it also would be a useful feature. The placeholder_attr option sounds like a great idea.
Like @elHornair said it would be useful when user has selected a choice and you don't want the user unselect it.

I found this while trying to figure out why placeholders weren't disabled by default when the select field is required. I'm surprised to discover not only is it by design, but so few people are inquiring about it. I'd go for the placeholder_attr solution, but really don't understand why you would ever want a selectable placeholder option if the select field is required, so I'd be ever more in favor of the option being disabled by default under those circumstances.