Worked on the symfony/symfony repository, focusing on backend development and testing with PHP. Addressed a critical bug in the Dotenv component that previously caused truncation of OS environment variable values, especially those containing apostrophes, when the $_ENV array was unpopulated. The solution involved aligning environment variable loading with the populate() method and leveraging $_SERVER as a reliable source, ensuring consistent handling regardless of PHP’s variables_order configuration. Updated the loadedRawVars tracking and resolveLoadedVars logic to preserve externally provided values such as abc$def, resulting in more stable environment variable management across diverse hosting and deployment environments.