<?php

declare(strict_types=1);

namespace Dotenv\Repository\Adapter;

use PhpOption\None;
use PhpOption\Option;
use PhpOption\Some;

final class PutenvAdapter implements AdapterInterface
{
    /**
     * Create a new putenv adapter instance.
     *
     * @return void
     */
    private function __construct()
    {
        //
    }

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

        return None::create();
    }

    /**
     * Determines if the adapter is supported.
     *
     * @return bool
     */
    private static function isSupported()
    {
        return \function_exists('getenv') && \function_exists('putenv');
    }

    /**
     * Read an environment variable, if it exists.
     *
     * @param non-empty-string $name
     *
     * @return \PhpOption\Option<string>
     */
    public function read(string $name)
    {
        /** @var \PhpOption\Option<string> */
        return Option::fromValue(\getenv($name), false)->filter(static function ($value) {
            return \is_string($value);
        });
    }

    /**
     * Write to an environment variable, if possible.
     *
     * @param non-empty-string $name
     * @param string           $value
     *
     * @return bool
     */
    public function write(string $name, string $value)
    {
        \putenv("$name=$value");

        return true;
    }

    /**
     * Delete an environment variable, if possible.
     *
     * @param non-empty-string $name
     *
     * @return bool
     */
    public function delete(string $name)
    {
        \putenv($name);

        return true;
    }
}

• [F] AdapterInterface.php
  Delete
• [F] ApacheAdapter.php
  Delete
• [F] ArrayAdapter.php
  Delete
• [F] EnvConstAdapter.php
  Delete
• [F] GuardedWriter.php
  Delete
• [F] ImmutableWriter.php
  Delete
• [F] MultiReader.php
  Delete
• [F] MultiWriter.php
  Delete
• [F] PutenvAdapter.php
  Delete
• [F] ReaderInterface.php
  Delete
• [F] ReplacingWriter.php
  Delete
• [F] ServerConstAdapter.php
  Delete
• [F] WriterInterface.php
  Delete

Blog Section

Discover the Latest in Digital Payments and NFC Technology

Dive into our blog to explore the cutting-edge trends in digital payments and NFC technology. Stay updated on the innovations that are revolutionizing transactions, boosting security, and making payments quicker and more convenient. Learn how these advancements are shaping the future of financial interactions and driving the global transition towards a cashless world.

The Rise of Contactless Payments:...

In recent years, contactless payments have surged in popularity, driven...

Visit Blog

March 27, 2024

Enhancing Payment Security: The Role...

As digital transactions proliferate, ensuring robust payment security is more critical than ever. Two foundational...

Visit Blog

March 27, 2024

The Future of Digital Wallets:...

Digital wallets have fundamentally transformed how we manage money, offering a streamlined, secure, and highly...

Visit Blog

March 27, 2024