Installation

phil/url-bundle

Requirement	Version	Why
PHP	8.5 or later	The floor the bundle declares
`phil/url`, `phil/enums`	^0.1@dev, ^0.3@dev	The value types and the enum sets
`symfony/form`, `symfony/options-resolver`	^8.2	`TypedUrlType`
`symfony/validator`	^8.2	`UrlOfType`
`symfony/dependency-injection`, `symfony/config`	^8.2	The bundle class
`doctrine/dbal`	optional	The column type `phil_url`
`twig/twig`	optional	The Twig filters and function

composer require phil/url-bundle

// config/bundles.php
return [
    // ...
    Phil\UrlBundle\PhilUrlBundle::class => ['all' => true],
];

With DoctrineBundle, the bundle registers the column type phil_url; with Twig, its extension; the messages come in English and French.

Configuration

One key: allow_localhost, false by default. localhost and the names under .localhost name the loopback address, so the form type, the constraint UrlOfType, the column type and the Twig extension refuse them, as phil/url does. An application allows them in development and in its tests only:

# config/packages/phil_url.yaml
when@dev:
    phil_url:
        allow_localhost: true

when@test:
    phil_url:
        allow_localhost: true

Allowed, http://localhost:8000/ and https://app.localhost/ are addresses; http://127.0.0.1/, any other single name and a user name stay refused. The value is also the container parameter phil_url.allow_localhost.