1. <?php
  3. /**
  4. * Error Handling and Fallback for File Operations
  5. *
  6. * Wraps file operations with error handling and fallback mechanisms.
  7. *
  8. * @param string $filePath Path to the file.
  9. * @param string $operation The operation to perform (e.g., 'read', 'write').
  10. * @param string $fallback_data Data to use if the primary operation fails.
  11. * @return mixed|false The result of the operation, or false on failure.
  12. */
  13. function safeFileOperation(string $filePath, string $operation, string $fallback_data = ''): mixed
  14. {
  15. try {
  16. switch ($operation) {
  17. case 'read':
  18. $fileContent = file_get_contents($filePath);
  19. if ($fileContent === false) {
  20. // Fallback: Return default data if file read fails
  21. error_log("Error reading file: $filePath. Falling back to: $fallback_data");
  22. return $fallback_data;
  23. }
  24. return $fileContent;
  26. case 'write':
  27. $result = file_put_contents($filePath, $fallback_data);
  28. if ($result === false) {
  29. error_log("Error writing to file: $filePath. Falling back to: $fallback_data");
  30. return false; // Indicate failure
  31. }
  32. return $result;
  34. case 'exists':
  35. if (file_exists($filePath)) {
  36. return true;
  37. } else {
  38. error_log("File does not exist: $filePath");
  39. return false;
  40. }
  42. default:
  43. error_log("Unsupported file operation: $operation");
  44. return false;
  45. }
  46. } catch (Exception $e) {
  47. error_log("Unexpected error: " . $e->getMessage());
  48. return false;
  49. }
  50. }
  52. // Example Usage:
  53. // $content = safeFileOperation('my_file.txt', 'read', 'Default content');
  54. // if ($content !== false) {
  55. // echo $content;
  56. // }
  58. // $result = safeFileOperation('new_file.txt', 'write', 'Initial data');
  59. // if ($result === false) {
  60. // echo "Write failed!";
  61. // }
  63. ?>

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