PHP Best Practices Priority: P1 (HIGH) Structure Implementation Guidelines Coding Style (PSR Standards) - PSR-12 : Enforce 4-space indentation and opening braces on same line for functions/methods. - Organization : One class per file; use statements follow namespace. Run PHP CS Fixer with PSR-12 preset. - Naming Conventions : Use (UserService) for classes, (getUserById) for methods/variables, and (MAX RETRIES) for class constants. SOLID Principles in PHP - SRP : Single Responsibility Principle — extract each into its own focused class; keep classes under 200 lines. - Dependency Inversion : in…