1. <?php
  3. /**
  4. * Reads text data from a file, with fallback mechanisms and error handling.
  5. *
  6. * @param string $filePath The path to the text file.
  7. * @param string $fallbackData Optional data to use if the file read fails.
  8. * @return string|null The content of the file, or the fallback data if the file is unavailable, or null on critical error.
  9. */
  10. function readTextFileWithFallback(string $filePath, string $fallbackData = ''): ?string
  11. {
  12. try {
  13. // Attempt to read the file.
  14. $fileContent = file_get_contents($filePath);
  16. // Check if file read was successful.
  17. if ($fileContent === false) {
  18. // File read failed. Log an error (or perform other logging).
  19. error_log("Error reading file: " . $filePath);
  20. return $fallbackData; // Use fallback data.
  21. }
  23. return $fileContent; // Return the file content.
  25. } catch (Exception $e) {
  26. //Catch any unexpected exceptions.
  27. error_log("Unexpected error reading file: " . $filePath . " - " . $e->getMessage());
  28. return $fallbackData;
  29. }
  30. }
  33. // Example usage:
  34. $filePath = 'data.txt'; // Replace with your file path
  35. $fallbackData = "Default data in case of file failure.";
  37. $data = readTextFileWithFallback($filePath, $fallbackData);
  39. if ($data !== null) {
  40. echo "File content:\n" . $data . "\n";
  41. } else {
  42. echo "Failed to retrieve data from file.\n";
  43. }
  46. ?>

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