Prateek Bhujel enhanced the SNMP extension in the php/php-src repository by improving error handling and code maintainability. He promoted invalid-input warnings to ValueError, enabling more precise feedback for users and streamlining troubleshooting. Through disciplined refactoring, Prateek standardized argument and variable names, which improved code readability and consistency, making future changes easier and reducing onboarding time for new contributors. His work leveraged C programming and deep knowledge of the SNMP protocol, focusing on robust error handling and system programming practices. These changes provided tangible business value by reducing support overhead and laying a solid foundation for ongoing extension development and maintenance.