1. <?php
  3. /**
  4. * Guards execution of user records for maintenance tasks with fallback logic.
  5. *
  6. * @param string $function The function to protect.
  7. * @param callable $fallback The fallback function to execute if the primary function fails.
  8. * @return void
  9. */
  10. function guardedExecution(string $function, callable $fallback): void
  11. {
  12. try {
  13. // Attempt to execute the primary function.
  14. $function();
  15. } catch (\Exception $e) {
  16. // If the primary function fails, execute the fallback.
  17. error_log("Maintenance task failed: " . $e->getMessage()); // Log the error
  18. if (is_callable($fallback)) {
  19. $fallback();
  20. } else {
  21. error_log("Fallback function not callable."); // Log if fallback is not callable
  22. }
  23. }
  24. }
  26. // Example usage:
  28. /**
  29. * Simulates a user record update that might fail.
  30. */
  31. function updateUserRecord(): void
  32. {
  33. // Simulate a database error.
  34. throw new \Exception("Database connection error!");
  35. //echo "Updating user record... (Simulated)";
  36. }
  38. /**
  39. * Simple fallback function.
  40. */
  41. function fallbackUpdateUserRecord(): void
  42. {
  43. //echo "Fallback: Could not update user record, attempting alternative action.";
  44. // Add alternative logic here, like logging or sending an email.
  45. error_log("Fallback: User record update failed. Performing alternative action.");
  46. }
  48. // Call the guarded execution function.
  49. guardedExecution("updateUserRecord", "fallbackUpdateUserRecord");
  51. ?>

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