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    <h3>Editing: Dsn.php</h3>
    <textarea name="content" rows="20" cols="80">&lt;?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier &lt;fabien@symfony.com&gt;
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Symfony\Component\Translation\Provider;

use Symfony\Component\Translation\Exception\InvalidArgumentException;
use Symfony\Component\Translation\Exception\MissingRequiredOptionException;

/**
 * @author Fabien Potencier &lt;fabien@symfony.com&gt;
 * @author Oskar Stark &lt;oskarstark@googlemail.com&gt;
 */
final class Dsn
{
    private $scheme;
    private $host;
    private $user;
    private $password;
    private $port;
    private $path;
    private $options;
    private $originalDsn;

    public function __construct(string $dsn)
    {
        $this-&gt;originalDsn = $dsn;

        if (false === $params = parse_url($dsn)) {
            throw new InvalidArgumentException('The translation provider DSN is invalid.');
        }

        if (!isset($params['scheme'])) {
            throw new InvalidArgumentException('The translation provider DSN must contain a scheme.');
        }
        $this-&gt;scheme = $params['scheme'];

        if (!isset($params['host'])) {
            throw new InvalidArgumentException('The translation provider DSN must contain a host (use &quot;default&quot; by default).');
        }
        $this-&gt;host = $params['host'];

        $this-&gt;user = '' !== ($params['user'] ?? '') ? rawurldecode($params['user']) : null;
        $this-&gt;password = '' !== ($params['pass'] ?? '') ? rawurldecode($params['pass']) : null;
        $this-&gt;port = $params['port'] ?? null;
        $this-&gt;path = $params['path'] ?? null;
        parse_str($params['query'] ?? '', $this-&gt;options);
    }

    public function getScheme(): string
    {
        return $this-&gt;scheme;
    }

    public function getHost(): string
    {
        return $this-&gt;host;
    }

    public function getUser(): ?string
    {
        return $this-&gt;user;
    }

    public function getPassword(): ?string
    {
        return $this-&gt;password;
    }

    public function getPort(?int $default = null): ?int
    {
        return $this-&gt;port ?? $default;
    }

    public function getOption(string $key, $default = null)
    {
        return $this-&gt;options[$key] ?? $default;
    }

    public function getRequiredOption(string $key)
    {
        if (!\array_key_exists($key, $this-&gt;options) || '' === trim($this-&gt;options[$key])) {
            throw new MissingRequiredOptionException($key);
        }

        return $this-&gt;options[$key];
    }

    public function getOptions(): array
    {
        return $this-&gt;options;
    }

    public function getPath(): ?string
    {
        return $this-&gt;path;
    }

    public function getOriginalDsn(): string
    {
        return $this-&gt;originalDsn;
    }
}
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