Merge e72ed606e8 into 426f5688a4

README.md

 * [MailCatcher](https://github.com/sj26/mailcatcher) - A web tool for capturing and viewing emails.
 * [Mailpit](https://github.com/axllent/mailpit) - An email and SMTP testing tool for developers.
 * [phpMyAdmin](https://github.com/phpmyadmin/phpmyadmin) - A web interface for MySQL/MariaDB.
+* [PHP Playground](https://php-play.dev) - A real-time playground for testing and learning PHP quickly in the browser.
 * [PHP Queue](https://github.com/CoderKungfu/php-queue) - An application for managing queueing backends.
 * [phpRedisAdmin](https://github.com/ErikDubbelboer/phpRedisAdmin) - A simple web interface to manage [Redis](https://redis.io/) databases.
 * [PHPSandbox](https://phpsandbox.io) - An online IDE for PHP in the browser.