1. <?php
  3. /**
  4. * Checks constraints of data entries for migration.
  5. *
  6. * Handles potential errors gracefully, logging them and continuing with the next entry.
  7. *
  8. * @param array $data The data entry to validate.
  9. * @param array $constraints An array of constraint rules. Each rule should be an associative array
  10. * with keys like 'field', 'type', 'value', 'message'.
  11. * Example: ['field' => 'email', 'type' => 'string', 'value' => 'email_regex', 'message' => 'Invalid email format']
  12. *
  13. * @return bool True if the entry passes all constraints, false otherwise.
  14. */
  15. function validateDataEntry(array $data, array $constraints): bool
  16. {
  17. foreach ($constraints as $constraint) {
  18. $field = $constraint['field'];
  19. $type = $constraint['type'];
  20. $value = $constraint['value'];
  21. $message = $constraint['message'];
  23. // Check if the field exists in the data. Important for robustness
  24. if (!isset($data[$field])) {
  25. error_log("Data validation error: Field '$field' missing from data.");
  26. continue; // Skip to the next constraint
  27. }
  29. $dataValue = $data[$field];
  31. switch ($type) {
  32. case 'string':
  33. if (!is_string($dataValue)) {
  34. error_log("Data validation error: Field '$field' must be a string.");
  35. return false;
  36. }
  37. break;
  38. case 'integer':
  39. if (!is_int($dataValue)) {
  40. error_log("Data validation error: Field '$field' must be an integer.");
  41. return false;
  42. }
  43. break;
  44. case 'float':
  45. if (!is_numeric($dataValue) || !is_float($dataValue)) {
  46. error_log("Data validation error: Field '$field' must be a float.");
  47. return false;
  48. }
  49. break;
  50. case 'email':
  51. if (!filter_var($dataValue, FILTER_VALIDATE_EMAIL)) {
  52. error_log("Data validation error: Field '$field' is not a valid email address.");
  53. return false;
  54. }
  55. break;
  56. case 'regex':
  57. if (!preg_match($value, $dataValue)) {
  58. error_log("Data validation error: Field '$field' does not match the regex pattern.");
  59. return false;
  60. }
  61. break;
  62. case 'required':
  63. if (empty($dataValue)) {
  64. error_log("Data validation error: Field '$field' is required.");
  65. return false;
  66. }
  67. break;
  68. case 'min_length':
  69. if (strlen($dataValue) < $constraint['min_length']) {
  70. error_log("Data validation error: Field '$field' must be at least " . $constraint['min_length'] . " characters long.");
  71. return false;
  72. }
  73. break;
  74. default:
  75. error_log("Data validation error: Unknown constraint type '$type' for field '$field'.");
  76. return false;
  77. }
  78. }
  80. return true; // All constraints passed
  81. }
  83. // Example Usage:
  84. /*
  85. $data = [
  86. 'id' => 123,
  87. 'name' => 'John Doe',
  88. 'email' => 'john.doe@example.com',
  89. 'age' => 30,
  90. 'description' => 'This is a test string',
  91. ];
  93. $constraints = [
  94. ['field' => 'id', 'type' => 'integer'],
  95. ['field' => 'name', 'type' => 'string'],
  96. ['field' => 'email', 'type' => 'email'],
  97. ['field' => 'age', 'type' => 'integer', 'min_length' => 1],
  98. ['field' => 'description', 'type' => 'string', 'required' => true],
  99. ['field' => 'phone', 'type' => 'string', 'message' => 'Phone number is required'], // Example of a missing field.
  100. ];
  102. if (validateDataEntry($data, $constraints)) {
  103. echo "Data entry is valid.\n";
  104. } else {
  105. echo "Data entry is invalid.\n";
  106. }
  107. */
  110. ?>

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