1. <?php
  3. /**
  4. * Hashes log stream values for batch processing.
  5. *
  6. * @param string $logStreamPath Path to the log file.
  7. * @param string $hashAlgorithm The hashing algorithm to use (e.g., 'sha256').
  8. * @param string $outputFile Path to the output file for hashed values.
  9. * @return void
  10. */
  11. function hashLogStream(string $logStreamPath, string $hashAlgorithm, string $outputFile): void
  12. {
  13. try {
  14. // Open the log file for reading.
  15. $logFile = fopen($logStreamPath, 'r');
  16. if (!$logFile) {
  17. error_log("Error: Could not open log file: $logStreamPath");
  18. return;
  19. }
  21. // Open the output file for writing.
  22. $outputFileHandle = fopen($outputFile, 'w');
  23. if (!$outputFileHandle) {
  24. error_log("Error: Could not open output file: $outputFile");
  25. fclose($logFile);
  26. return;
  27. }
  29. // Process each line in the log file.
  30. while (($line = fgets($logFile)) !== false) {
  31. // Skip empty lines.
  32. if (empty($line)) {
  33. continue;
  34. }
  36. // Hash the log line.
  37. $hash = hash($hashAlgorithm, $line);
  39. // Write the original line and its hash to the output file.
  40. fprintf($outputFileHandle, "%s|%s\n", $line, $hash);
  41. }
  43. // Close the log file and the output file.
  44. fclose($logFile);
  45. fclose($outputFileHandle);
  47. echo "Log stream hashed successfully. Hashed values written to: $outputFile\n";
  49. } catch (Exception $e) {
  50. error_log("An unexpected error occurred: " . $e->getMessage());
  51. }
  52. }
  54. // Example usage:
  55. // hashLogStream('/path/to/your/log.txt', 'sha256', '/path/to/hashed_logs.txt');
  57. ?>

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