1. <?php
  3. /**
  4. * Compares values from two web forms for an experiment.
  5. *
  6. * @param array $form1 Data from the first form.
  7. * @param array $form2 Data from the second form.
  8. * @return array An associative array containing the comparison results.
  9. */
  10. function compareForms(array $form1, array $form2): array
  11. {
  12. $results = [];
  14. // Check if the forms have the same keys (same fields)
  15. if (array_keys($form1) !== array_keys($form2)) {
  16. $results['error'] = 'Forms have different fields.';
  17. return $results; // Exit if fields are different
  18. }
  20. foreach ($form1 as $field => $value1) {
  21. if (isset($form2[$field])) {
  22. $value2 = $form2[$field];
  24. // Compare values based on data type
  25. if (is_numeric($value1) && is_numeric($value2)) {
  26. $comparison = compareNumbers($value1, $value2);
  27. } elseif (is_string($value1) && is_string($value2)) {
  28. $comparison = compareStrings($value1, $value2);
  29. } else {
  30. $comparison = $value1 === $value2; // For other types, use strict comparison
  31. }
  33. $results[$field] = [
  34. 'value1' => $value1,
  35. 'value2' => $value2,
  36. 'match' => $comparison,
  37. ];
  38. } else {
  39. $results[$field] = [
  40. 'value1' => $value1,
  41. 'value2' => null,
  42. 'match' => false, // Field missing in form2
  43. ];
  44. }
  45. }
  47. return $results;
  48. }
  50. /**
  51. * Compares two numbers.
  52. *
  53. * @param float $num1 The first number.
  54. * @param float $num2 The second number.
  55. * @return int 0 if equal, 1 if num1 > num2, -1 if num1 < num2.
  56. */
  57. function compareNumbers(float $num1, float $num2): int
  58. {
  59. if ($num1 == $num2) {
  60. return 0;
  61. } elseif ($num1 > $num2) {
  62. return 1;
  63. } else {
  64. return -1;
  65. }
  66. }
  69. /**
  70. * Compares two strings.
  71. *
  72. * @param string $str1 The first string.
  73. * @param string $str2 The second string.
  74. * @return int 0 if equal, 1 if str1 > str2, -1 if str1 < str2.
  75. */
  76. function compareStrings(string $str1, string $str2): int
  77. {
  78. $comparison = strcmp($str1, $str2); // Use strcmp for string comparison
  79. if ($comparison == 0) {
  80. return 0;
  81. } elseif ($comparison > 0) {
  82. return 1;
  83. } else {
  84. return -1;
  85. }
  86. }
  89. // Example Usage (replace with your actual form data)
  90. $form1Data = [
  91. 'name' => 'John Doe',
  92. 'age' => 30,
  93. 'city' => 'New York',
  94. 'score' => 85.5,
  95. ];
  97. $form2Data = [
  98. 'name' => 'John Doe',
  99. 'age' => 30,
  100. 'city' => 'London',
  101. 'score' => 92.0,
  102. ];
  104. $comparisonResults = compareForms($form1Data, $form2Data);
  106. // Output the results (you can format this as needed)
  107. echo "<pre>";
  108. print_r($comparisonResults);
  109. echo "</pre>";
  111. ?>

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