Constants and Configuration Values Avoid hardcoded values throughout your codebase. Use constants, configuration files, and enums to make your application more maintainable, refactorable, and debuggable. The Problem with Hardcoded Values Solution 1: PHP Constants and Enums Class Constants PHP 8.1+ Enums Solution 2: Configuration Files Application-Wide Settings Feature-Specific Configuration Solution 3: Database-Driven Configuration Settings Model Solution 4: Service Constants Solution 5: Validation Constants Solution 6: HTTP Status Constants Solution 7: Queue Priorities and Job Constants Envi…