1. <?php
  3. /**
  4. * Diagnostics script to surface HTTP header errors with a timeout.
  5. *
  6. * @param int $timeout Timeout in seconds.
  7. * @return void
  8. */
  9. function diagnoseHeaders(int $timeout = 5): void
  10. {
  11. $startTime = time();
  12. $errors = [];
  14. $headers = get_headers();
  16. if ($headers === false) {
  17. $errors[] = "Failed to retrieve headers.";
  18. } else {
  19. foreach ($headers as $header) {
  20. if (strpos($header, ': ') !== false) { // Check if it's a header line
  21. list($name, $value) = explode(': ', $header, 2); // Split into name and value
  23. // Basic error checks - expand as needed
  24. if (empty($name)) {
  25. $errors[] = "Invalid header name: " . $name;
  26. } elseif (empty($value)) {
  27. $errors[] = "Empty header value: " . $name;
  28. }
  29. }
  30. }
  31. }
  34. $endTime = time();
  35. $duration = $endTime - $startTime;
  37. if ($duration > $timeout) {
  38. $errors[] = "Timeout exceeded: " . $duration . " seconds.";
  39. }
  42. if (!empty($errors)) {
  43. echo "Header Diagnostics:\n";
  44. foreach ($errors as $error) {
  45. echo "- " . $error . "\n";
  46. }
  47. } else {
  48. echo "No header errors found.\n";
  49. }
  50. }
  53. //Example usage:
  54. diagnoseHeaders(10); //Run with a 10 second timeout
  55. ?>

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