1. <?php
  3. /**
  4. * Configuration Loader for Scheduled Tasks.
  5. * Loads configuration from files, allowing for easy modification
  6. * without code changes.
  7. */
  8. class ConfigLoader
  9. {
  10. /**
  11. * Loads configuration from a file.
  12. *
  13. * @param string $filePath Path to the configuration file.
  14. * @return array|null An associative array representing the configuration,
  15. * or null if the file cannot be loaded.
  16. */
  17. public static function loadConfig(string $filePath): ?array
  18. {
  19. if (file_exists($filePath)) {
  20. $config = file_get_contents($filePath);
  21. if ($config !== false) {
  22. $config = json_decode($config, true); // Decode as associative array
  23. if (json_last_error() === JSON_ERROR_NONE) {
  24. return $config;
  25. } else {
  26. error_log("Error decoding JSON from file: " . json_last_error_msg());
  27. return null;
  28. }
  29. } else {
  30. error_log("Error reading file: " . $filePath);
  31. return null;
  32. }
  33. } else {
  34. error_log("Configuration file not found: " . $filePath);
  35. return null;
  36. }
  37. }
  39. /**
  40. * Gets a configuration value.
  41. *
  42. * @param array $config The configuration array.
  43. * @param string $key The key of the value to retrieve.
  44. * @param mixed $defaultValue The default value to return if the key
  45. * is not found.
  46. * @return mixed The value associated with the key, or the default
  47. * value if the key is not found.
  48. */
  49. public static function get(array $config, string $key, $defaultValue = null)
  50. {
  51. if (array_key_exists($key, $config)) {
  52. return $config[$key];
  53. } else {
  54. return $defaultValue;
  55. }
  56. }
  57. }
  60. // Example Usage (in your scheduled task script)
  62. // Load the configuration
  63. $config = ConfigLoader::loadConfig('config.json');
  65. if ($config) {
  66. // Access configuration values
  67. $startTime = ConfigLoader::get($config, 'start_time');
  68. $interval = ConfigLoader::get($config, 'interval', 60); // Default interval is 60 seconds
  69. $logFile = ConfigLoader::get($config, 'log_file', 'scheduled_task.log');
  70. $enabled = ConfigLoader::get($config, 'enabled', true);
  73. //Your scheduled task logic here, using the config values
  74. if ($enabled) {
  75. echo "Scheduled task started.\n";
  76. // ... your task code ...
  77. file_put_contents($logFile, date('Y-m-d H:i:s') . " - Task executed.\n", FILE_APPEND);
  78. } else {
  79. echo "Scheduled task is disabled.\n";
  80. }
  82. } else {
  83. echo "Failed to load configuration. Exiting.\n";
  84. }
  87. ?>

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