1. <?php
  3. /**
  4. * Form Field Formatter with Basic Validation
  5. *
  6. * This script formats form field data and performs basic validation.
  7. */
  9. // Sample form data (replace with actual $_POST data)
  10. $formData = [
  11. 'name' => 'John Doe',
  12. 'email' => 'john.doe@example.com',
  13. 'age' => '30',
  14. 'phone' => '123-456-7890',
  15. 'city' => 'New York',
  16. ];
  19. /**
  20. * Form Field Formatting Function
  21. *
  22. * Formats individual form fields for display or processing.
  23. * @param string $fieldName The name of the form field.
  24. * @param mixed $value The value of the form field.
  25. * @param string $type The field type ('text', 'email', 'number', 'phone').
  26. * @return string The formatted field value or an error message.
  27. */
  28. function formatFormField(string $fieldName, $value, string $type): string
  29. {
  30. // Basic validation
  31. if (empty($value)) {
  32. return '<span style="color:red;">' . $fieldName . ' is required.</span>';
  33. }
  35. // Type-specific formatting
  36. switch ($type) {
  37. case 'text':
  38. return '<input type="text" name="' . $fieldName . '" value="' . htmlspecialchars($value) . '">';
  39. case 'email':
  40. if (!filter_var($value, FILTER_VALIDATE_EMAIL)) {
  41. return '<span style="color:red;">' . $fieldName . ' is not a valid email.</span>';
  42. }
  43. return '<input type="email" name="' . $fieldName . '" value="' . htmlspecialchars($value) . '">';
  44. case 'number':
  45. if (!is_numeric($value)) {
  46. return '<span style="color:red;">' . $fieldName . ' must be a number.</span>';
  47. }
  48. return '<input type="number" name="' . $fieldName . '" value="' . htmlspecialchars($value) . '">';
  49. case 'phone':
  50. // Basic phone number validation (can be improved)
  51. if (!preg_match('/^\d{3}-\d{3}-\d{4}$/', $value)) {
  52. return '<span style="color:red;">' . $fieldName . ' must be in the format XXX-XXX-XXXX.</span>';
  53. }
  54. return '<input type="tel" name="' . $fieldName . '" value="' . htmlspecialchars($value) . '">';
  55. default:
  56. return '<input type="text" name="' . $fieldName . '" value="' . htmlspecialchars($value) . '">'; // Default to text
  57. }
  58. }
  61. // Output the formatted form fields
  62. echo '<form>';
  63. echo '<fieldset>';
  65. echo '<legend>Form Data</legend>';
  67. echo formatFormField('name', $formData['name'], 'text');
  68. echo formatFormField('email', $formData['email'], 'email');
  69. echo formatFormField('age', $formData['age'], 'number');
  70. echo formatFormField('phone', $formData['phone'], 'phone');
  71. echo formatFormField('city', $formData['city'], 'text');
  73. echo '</fieldset>';
  74. echo '<button type="submit">Submit</button>';
  75. echo '</form>';
  77. ?>

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