1. <?php
  3. /**
  4. * Monitors the state of JSON payloads for a legacy project.
  5. * Outputs simple error messages if issues are detected.
  6. */
  8. // Function to validate JSON
  9. function validateJson($jsonString) {
  10. try {
  11. $data = json_decode($jsonString);
  12. if (json_last_error() !== JSON_ERROR_NONE) {
  13. return false; // JSON decode error
  14. }
  15. return true;
  16. } catch (Exception $e) {
  17. return false; //General exception during decoding
  18. }
  19. }
  21. // Function to check if required fields are present
  22. function checkRequiredFields($data, $requiredFields) {
  23. foreach ($requiredFields as $field) {
  24. if (!isset($data[$field])) {
  25. return false; // Required field missing
  26. }
  27. }
  28. return true;
  29. }
  32. //Example Usage - Replace with your actual JSON payload and required fields
  33. $jsonPayload = '{"name": "John Doe", "age": 30}'; // Example JSON
  34. $requiredFields = ['name', 'age']; // Example required fields
  37. if (!validateJson($jsonPayload)) {
  38. echo "Error: Invalid JSON format.\n";
  39. } elseif (!checkRequiredFields($jsonPayload, $requiredFields)) {
  40. echo "Error: Missing required fields.\n";
  41. } else {
  42. echo "JSON payload is valid.\n";
  43. }
  46. ?>

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