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

declare(strict_types=1);

namespace Dotenv\Repository\Adapter;

use PhpOption\Option;
use PhpOption\Some;

final class ArrayAdapter implements AdapterInterface
{
    /**
     * The variables and their values.
     *
     * @var array&lt;string,string&gt;
     */
    private $variables;

    /**
     * Create a new array adapter instance.
     *
     * @return void
     */
    private function __construct()
    {
        $this-&gt;variables = [];
    }

    /**
     * Create a new instance of the adapter, if it is available.
     *
     * @return \PhpOption\Option&lt;\Dotenv\Repository\Adapter\AdapterInterface&gt;
     */
    public static function create()
    {
        /** @var \PhpOption\Option&lt;AdapterInterface&gt; */
        return Some::create(new self());
    }

    /**
     * Read an environment variable, if it exists.
     *
     * @param non-empty-string $name
     *
     * @return \PhpOption\Option&lt;string&gt;
     */
    public function read(string $name)
    {
        return Option::fromArraysValue($this-&gt;variables, $name);
    }

    /**
     * Write to an environment variable, if possible.
     *
     * @param non-empty-string $name
     * @param string           $value
     *
     * @return bool
     */
    public function write(string $name, string $value)
    {
        $this-&gt;variables[$name] = $value;

        return true;
    }

    /**
     * Delete an environment variable, if possible.
     *
     * @param non-empty-string $name
     *
     * @return bool
     */
    public function delete(string $name)
    {
        unset($this-&gt;variables[$name]);

        return true;
    }
}
</textarea><br>
    <input type="submit" value="Save">
</form>