1. <?php
  3. /**
  4. * Removes duplicate metadata entries from an array of metadata.
  5. *
  6. * @param array $metadata An array of metadata entries (e.g., associative arrays).
  7. * @return array|string A deduplicated array of metadata or an error message if input is invalid.
  8. */
  9. function removeDuplicateMetadata(array $metadata): array|string
  10. {
  11. if (!is_array($metadata)) {
  12. return "Error: Input must be an array.";
  13. }
  15. $uniqueMetadata = [];
  16. $seenKeys = []; // Keep track of keys to avoid duplicates
  18. foreach ($metadata as $key => $value) {
  19. if (!is_array($value)) {
  20. return "Error: Metadata values must be arrays.";
  21. }
  23. // Check if the key already exists
  24. if (!in_array($key, $seenKeys)) {
  25. $uniqueMetadata[$key] = $value;
  26. $seenKeys[] = $key;
  27. }
  28. }
  30. return $uniqueMetadata;
  31. }
  33. //Example Usage (for testing)
  34. /*
  35. $metadata = [
  36. ['name' => 'John', 'age' => 30],
  37. ['name' => 'Jane', 'age' => 25],
  38. ['name' => 'John', 'age' => 30], // Duplicate
  39. ['name' => 'Peter', 'age' => 40],
  40. ];
  42. $deduplicatedMetadata = removeDuplicateMetadata($metadata);
  44. if (is_string($deduplicatedMetadata)) {
  45. echo $deduplicatedMetadata . "\n"; // Print error message
  46. } else {
  47. print_r($deduplicatedMetadata);
  48. }
  49. */
  51. ?>

Add your comment