Worked on the FreshRSS/simplepie repository to enhance stability and compatibility for PHP applications, focusing on resolving deprecation issues introduced in PHP 8.5. Addressed a key bug by conditionally wrapping calls to xml_parser_free and curl_close, ensuring that deprecated function warnings do not appear on older PHP versions. This approach reduced runtime warnings across diverse hosting environments and facilitated smoother PHP upgrades. Emphasized regression testing and version-guarded logic to catch cross-version issues early in the CI workflow. Utilized PHP development skills and a strong understanding of version compatibility to minimize maintenance burdens and support reliable deployments across multiple PHP environments.