1. <?php
  3. /**
  4. * Synchronizes resources of arrays for an experiment with basic sanity checks.
  5. *
  6. * @param array $arrays An array of arrays to synchronize.
  7. * @param string $sync_key The key to use for synchronization.
  8. *
  9. * @return array|false Returns a new array with synchronized resources, or false on error.
  10. */
  11. function syncArrays(array $arrays, string $sync_key)
  12. {
  13. if (empty($arrays)) {
  14. return []; // Return empty array if input is empty
  15. }
  17. $synchronized = [];
  19. foreach ($arrays as $array) {
  20. if (!is_array($array)) {
  21. error_log("Error: Invalid array element found. Skipping."); // Log error
  22. continue;
  23. }
  24. if (!isset($array[$sync_key])) {
  25. error_log("Error: Sync key '$sync_key' not found in array. Skipping."); // Log error
  26. continue;
  27. }
  29. $sync_value = $array[$sync_key];
  31. if (!is_numeric($sync_value)) {
  32. error_log("Error: Sync value must be numeric. Skipping."); // Log error
  33. continue;
  34. }
  37. if (!isset($synchronized[$sync_value])) {
  38. $synchronized[$sync_value] = $array; // Initialize entry
  39. } else {
  40. // Merge resources, prioritizing current array's values
  41. $synchronized[$sync_value] = array_merge($synchronized[$sync_value], $array);
  42. }
  43. }
  45. // Sanity checks: Ensure all values are arrays
  46. foreach ($synchronized as $key => $array) {
  47. if (!is_array($array)) {
  48. error_log("Error: Synchronized value is not an array. Skipping."); //Log Error
  49. unset($synchronized[$key]);
  50. }
  51. }
  53. if (empty($synchronized)) {
  54. return false; // Return false if no valid synchronized arrays
  55. }
  57. return $synchronized;
  58. }
  60. ?>

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