1. <?php
  3. /**
  4. * Reads user data configuration from a file.
  5. * Handles file not found and invalid format errors.
  6. *
  7. * @param string $config_file Path to the configuration file.
  8. * @return array|null An associative array containing user data configuration,
  9. * or null if an error occurred.
  10. */
  11. function readUserConfig(string $config_file): ?array
  12. {
  13. if (!file_exists($config_file)) {
  14. error_log("Error: Configuration file not found: " . $config_file);
  15. return null; // File not found
  16. }
  18. $config = [];
  19. $data = file_get_contents($config_file);
  21. if ($data === false) {
  22. error_log("Error: Failed to read configuration file: " . $config_file);
  23. return null; // Failed to read file
  24. }
  26. // Attempt to parse the configuration data (assuming it's in a valid format like JSON or YAML)
  27. $config = json_decode($data, true); // Decode as associative array
  29. if (json_last_error() !== JSON_ERROR_NONE) {
  30. error_log("Error: Invalid JSON format in configuration file: " . $config_file);
  31. return null; // Invalid JSON
  32. }
  34. // Validate required keys
  35. if (!isset($config['user_id']) || !is_numeric($config['user_id'])) {
  36. error_log("Error: Missing or invalid user_id in configuration: " . $config_file);
  37. return null; // Missing/Invalid user_id
  38. }
  40. if (!isset($config['email']) || !filter_var($config['email'], FILTER_VALIDATE_EMAIL)) {
  41. error_log("Error: Invalid email format in configuration: " . $config_file);
  42. return null; // Invalid email
  43. }
  45. if (!isset($config['age']) || !is_numeric($config['age']) || $config['age'] < 0 || $config['age'] > 120) {
  46. error_log("Error: Invalid age in configuration: " . $config_file);
  47. return null; // Invalid age
  48. }
  50. //Optional: Validate other fields as needed. Example:
  51. if (isset($config['location']) && !is_string($config['location'])) {
  52. error_log("Error: Invalid location format in configuration: " . $config_file);
  53. return null;
  54. }
  56. return $config;
  57. }
  59. // Example usage:
  60. $config_file = 'user_config.json'; // Your configuration file
  62. $user_config = readUserConfig($config_file);
  64. if ($user_config) {
  65. // Use the configuration data
  66. echo "User ID: " . $user_config['user_id'] . "\n";
  67. echo "Email: " . $user_config['email'] . "\n";
  68. echo "Age: " . $user_config['age'] . "\n";
  69. } else {
  70. echo "Failed to load user configuration.\n";
  71. }
  73. ?>

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