1. <?php
  3. /**
  4. * Data Migration Form Validation
  5. *
  6. * Validates form data for data migration purposes.
  7. *
  8. * @param array $data The form data array.
  9. * @return array|bool Returns an array of errors if validation fails,
  10. * or true if validation passes.
  11. */
  12. function validateData(array $data)
  13. {
  14. $errors = [];
  16. // Validate required fields
  17. if (empty($data['firstName'])) {
  18. $errors['firstName'] = 'First name is required.';
  19. }
  20. if (empty($data['lastName'])) {
  21. $errors['lastName'] = 'Last name is required.';
  22. }
  23. if (empty($data['email'])) {
  24. $errors['email'] = 'Email is required.';
  25. }
  26. if (empty($data['age'])) {
  27. $errors['age'] = 'Age is required.';
  28. }
  30. // Validate email format
  31. if (!filter_var($data['email'], FILTER_VALIDATE_EMAIL)) {
  32. $errors['email'] = 'Invalid email format.';
  33. }
  35. // Validate age is a number
  36. if (!is_numeric($data['age'])) {
  37. $errors['age'] = 'Age must be a number.';
  38. }
  39. if ($data['age'] < 0 || $data['age'] > 150) {
  40. $errors['age'] = 'Age must be between 0 and 150.';
  41. }
  43. // Example: Validate first name length
  44. if (strlen($data['firstName']) > 50) {
  45. $errors['firstName'] = 'First name cannot be more than 50 characters.';
  46. }
  48. // Example: Validate last name length
  49. if (strlen($data['lastName']) > 50) {
  50. $errors['lastName'] = 'Last name cannot be more than 50 characters.';
  51. }
  54. // Return errors or success
  55. if (!empty($errors)) {
  56. return $errors;
  57. } else {
  58. return true; // Validation successful
  59. }
  60. }
  62. //Example usage
  63. if ($_SERVER["REQUEST_METHOD"] == "POST") {
  64. $formData = $_POST;
  65. $validationErrors = validateData($formData);
  67. if (is_array($validationErrors)) {
  68. // Display errors to the user
  69. echo "<div>";
  70. foreach ($validationErrors as $field => $error) {
  71. echo "<p style='color:red;'>$error</p>";
  72. }
  73. echo "</div>";
  74. } else {
  75. // Data is valid, proceed with migration
  76. echo "Data is valid. Proceeding with migration...";
  77. }
  78. }
  80. ?>

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