WordPress offers a specialized debugging system that streamlines PHP code troubleshooting, enhancing consistency across core files, plugins, and themes. This system provides users, including non-programmers, with tools to reveal detailed error information. Essential precautions such as employing staging environments or backing up websites before alterations are emphasized. Core debugging constants like WP_DEBUG, WP_DEBUG_LOG, WP_DEBUG_DISPLAY, and SCRIPT_DEBUG allow developers to control error logging, display, and use of development versions of scripts. Additionally, mechanisms to identify deprecated functions help maintain code quality. Advanced debugging includes saving database queries for performance analysis and utilizing supporting plugins like Debug Bar to gain insights on queries and PHP issues, ultimately promoting productive and maintainable coding practices.