During June 2026, contributed to the php/php-src repository by addressing a critical stability issue in the PHP core. Focused on system programming and compiler design using C, the work involved delivering a targeted bug fix in the Zend.m4 emulation function for global register detection. By adding a missing return statement, the update improved the reliability and correctness of the emulation path, reducing edge-case failures and enhancing CI and build stability. The solution was closely linked to a tracked GitHub issue and pull request, ensuring traceability and facilitating code review. This contribution strengthened the internal stability of the PHP core.