1. <?php
  3. /**
  4. * Normalizes header metadata for batch processing.
  5. *
  6. * This function takes an array of header metadata and standardizes
  7. * it to a consistent format. It focuses on simple normalization,
  8. * handling common variations in header names and values.
  9. *
  10. * @param array $header_metadata An array of header metadata. Each element
  11. * should be an associative array representing
  12. * a single header.
  13. * @return array Normalized header metadata. Returns an empty array on error.
  14. */
  15. function normalizeHeaderMetadata(array $header_metadata): array
  16. {
  17. $normalized_metadata = [];
  19. foreach ($header_metadata as $header) {
  20. $normalized_header = [];
  22. // Normalize 'header_name' key
  23. $normalized_header['name'] = trim($header['header_name']);
  25. // Normalize 'header_value' key - handle different data types
  26. $normalized_header['value'] = trim($header['header_value']);
  27. if (is_numeric($normalized_header['value'])) {
  28. $normalized_header['value'] = (float)$normalized_header['value']; // Convert to float if numeric
  29. } else {
  30. $normalized_header['value'] = $normalized_header['value']; // Keep as string otherwise
  31. }
  33. //Add other potential normalized keys, like 'description'
  34. if(isset($header['description'])){
  35. $normalized_header['description'] = trim($header['description']);
  36. }
  39. $normalized_metadata[] = $normalized_header;
  40. }
  41. return $normalized_metadata;
  42. }
  44. //Example Usage (for testing)
  45. /*
  46. $header_data = [
  47. ['header_name' => ' Content-Type ', 'header_value' => 'text/html'],
  48. ['header_name' => ' Cache-Control ', 'header_value' => 'no-cache'],
  49. ['header_name' => ' Max-Age ', 'header_value' => '3600'],
  50. ['header_name' => 'description', 'header_value' => 'This is a test description']
  51. ];
  53. $normalized_data = normalizeHeaderMetadata($header_data);
  55. print_r($normalized_data);
  56. */
  59. ?>

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