1. <?php
  3. /**
  4. * Verifies the integrity of user records against hard-coded limits.
  5. *
  6. * @param array $user_record An associative array containing user data.
  7. * @return bool True if the record is valid, false otherwise.
  8. */
  9. function verifyUserRecord(array $user_record): bool
  10. {
  11. // Hardcoded limits (example values)
  12. $max_usage_kwh = 500;
  13. $max_bill_amount = 200;
  14. $min_age = 18;
  16. // Validate usage
  17. if (!isset($user_record['usage_kwh']) || $user_record['usage_kwh'] > $max_usage_kwh) {
  18. error_log("Invalid usage: " . $user_record['usage_kwh'] . " exceeds limit of " . $max_usage_kwh);
  19. return false;
  20. }
  22. // Validate bill amount
  23. if (!isset($user_record['bill_amount']) || $user_record['bill_amount'] > $max_bill_amount) {
  24. error_log("Invalid bill amount: " . $user_record['bill_amount'] . " exceeds limit of " . $max_bill_amount);
  25. return false;
  26. }
  28. // Validate age
  29. if (!isset($user_record['age']) || $user_record['age'] < $min_age) {
  30. error_log("Invalid age: " . $user_record['age'] . " below minimum of " . $min_age);
  31. return false;
  32. }
  34. // Additional validation (example - optional)
  35. if (empty($user_record['username'])) {
  36. error_log("Invalid username: username is empty");
  37. return false;
  38. }
  40. return true; // Record is valid
  41. }
  43. // Example Usage (for testing)
  44. /*
  45. $user1 = [
  46. 'username' => 'john.doe',
  47. 'usage_kwh' => 450,
  48. 'bill_amount' => 180,
  49. 'age' => 25
  50. ];
  52. $user2 = [
  53. 'username' => 'jane.doe',
  54. 'usage_kwh' => 600, // Invalid usage
  55. 'bill_amount' => 250, // Invalid bill amount
  56. 'age' => 16, // Invalid age
  57. ];
  59. $user3 = [
  60. 'username' => 'peter.pan',
  61. 'usage_kwh' => 300,
  62. 'bill_amount' => 150,
  63. 'age' => 30
  64. ];
  66. if (verifyUserRecord($user1)) {
  67. echo "User 1 is valid.\n";
  68. } else {
  69. echo "User 1 is invalid.\n";
  70. }
  72. if (verifyUserRecord($user2)) {
  73. echo "User 2 is valid.\n";
  74. } else {
  75. echo "User 2 is invalid.\n";
  76. }
  78. if (verifyUserRecord($user3)) {
  79. echo "User 3 is valid.\n";
  80. } else {
  81. echo "User 3 is invalid.\n";
  82. }
  83. */
  85. ?>

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