1. <?php
  3. /**
  4. * Function to make an API request with metadata and retry logic.
  5. *
  6. * @param string $url The URL to make the request to.
  7. * @param array $headers Optional array of HTTP headers.
  8. * @param array $metadata Optional array of metadata to attach to the response.
  9. * @param int $maxRetries Maximum number of retries.
  10. * @param int $retryDelay Delay between retries in seconds.
  11. * @return mixed|null The response body if successful, null on failure.
  12. */
  13. function apiRequestWithMetadataAndRetry(string $url, array $headers = [], array $metadata = [], int $maxRetries = 3, int $retryDelay = 2): ?mixed
  14. {
  15. $retries = 0;
  17. while ($retries < $maxRetries) {
  18. try {
  19. // Make the API request
  20. $response = file_get_contents($url, false, $headers);
  22. if ($response === false) {
  23. throw new Exception("Failed to fetch URL: " . $url);
  24. }
  26. // Attach metadata to the response
  27. $response = json_decode($response, true);
  28. if (json_last_error() !== JSON_ERROR_NONE) {
  29. throw new Exception("Failed to decode JSON: " . json_last_error_msg());
  30. }
  31. $response['metadata'] = $metadata;
  33. return $response; // Return the response if successful
  35. } catch (Exception $e) {
  36. $retries++;
  37. if ($retries >= $maxRetries) {
  38. error_log("API Request failed after " . $maxRetries . " retries: " . $e->getMessage());
  39. return null; // Return null if max retries reached
  40. }
  42. // Wait before retrying
  43. sleep($retryDelay);
  44. }
  45. }
  47. return null; // Should not reach here, but added for safety.
  48. }
  50. //Example Usage:
  51. /*
  52. $url = 'https://api.example.com/data';
  53. $headers = ['Content-Type: application/json'];
  54. $metadata = ['timestamp' => time(), 'user_id' => 123];
  56. $response = apiRequestWithMetadataAndRetry($url, $headers, $metadata, 5, 5);
  58. if ($response) {
  59. echo "<pre>";
  60. print_r($response);
  61. echo "</pre>";
  62. } else {
  63. echo "API request failed.";
  64. }
  65. */
  67. ?>

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