1. <?php
  3. /**
  4. * Validates a timestamp string.
  5. *
  6. * @param string $timestamp_string The timestamp string to validate.
  7. * @param string $format The expected timestamp format (e.g., 'Y-m-d H:i:s').
  8. * @return bool True if the timestamp is valid, false otherwise.
  9. */
  10. function validateTimestamp(string $timestamp_string, string $format = 'Y-m-d H:i:s'): bool
  11. {
  12. // Check if the timestamp string is provided
  13. if (empty($timestamp_string)) {
  14. return false;
  15. }
  17. // Attempt to create a DateTime object from the timestamp string
  18. try {
  19. $dateTime = new DateTime($timestamp_string, new DateTimeZone('UTC')); //Use UTC to avoid timezone issues
  20. } catch (Exception $e) {
  21. // If DateTime fails to create an object, the timestamp is invalid
  22. return false;
  23. }
  25. // Check if the timestamp matches the expected format
  26. $dateTimeFormat = new DateTimeFormat($format);
  27. $dateTime->format($dateTimeFormat);
  29. // If the timestamp is valid, return true
  30. return true;
  31. }
  34. /**
  35. * Validates an array of timestamps.
  36. *
  37. * @param array $timestamp_array An array of timestamp strings.
  38. * @param string $format The expected timestamp format (e.g., 'Y-m-d H:i:s').
  39. * @return array An array of validation results (true/false for each timestamp).
  40. */
  41. function validateTimestampArray(array $timestamp_array, string $format = 'Y-m-d H:i:s'): array
  42. {
  43. $results = [];
  44. foreach ($timestamp_array as $timestamp_string) {
  45. $results[] = validateTimestamp($timestamp_string, $format);
  46. }
  47. return $results;
  48. }
  50. ?>

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