1. <?php
  3. /**
  4. * Compresses timestamp output with retry intervals for monitoring.
  5. *
  6. * @param callable $data_source A function that returns the data to be timestamped.
  7. * @param int $retry_interval Seconds between retry attempts.
  8. * @param int $max_retries Maximum number of retry attempts.
  9. * @return string Compacted timestamped output.
  10. */
  11. function compactTimestampedOutput(callable $data_source, int $retry_interval, int $max_retries): string
  12. {
  13. $retries = 0;
  14. $output = '';
  16. do {
  17. $data = $data_source(); // Fetch data
  19. if ($data !== false) { // Check for data availability
  20. $timestamp = date('Y-m-d H:i:s'); // Current timestamp
  21. $output .= $timestamp . ': ' . $data . "\n"; // Format and append output
  22. $retries = 0; // Reset retry count on success
  23. } else {
  24. $retries++;
  25. if ($retries > $max_retries) {
  26. return 'ERROR: Max retries reached.'; // Handle max retries
  27. }
  28. sleep($retry_interval); // Wait before retrying
  29. }
  30. } while ($retries <= $max_retries);
  32. return $output; // Return the accumulated output
  33. }

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