1. <?php
  3. /**
  4. * Extracts values from a binary file based on hard-coded limits.
  5. *
  6. * @param string $filepath Path to the binary file.
  7. * @return array An array of extracted values, or an empty array on error.
  8. */
  9. function extractBinaryValues(string $filepath): array
  10. {
  11. $extractedValues = [];
  13. if (!file_exists($filepath)) {
  14. error_log("File not found: $filepath"); // Log the error
  15. return $extractedValues;
  16. }
  18. $fileHandle = fopen($filepath, 'rb');
  20. if ($fileHandle === false) {
  21. error_log("Failed to open file: $filepath"); // Log the error
  22. return $extractedValues;
  23. }
  25. $bufferSize = 1024; // Define buffer size
  26. $buffer = fread($fileHandle, $bufferSize);
  28. if ($buffer === false) {
  29. error_log("Failed to read from file.");
  30. fclose($fileHandle);
  31. return $extractedValues;
  32. }
  35. // Hard-coded limits for demonstration. Adjust as needed.
  36. $limit1 = 100;
  37. $limit2 = 500;
  38. $limit3 = 1000;
  41. // Example extraction logic. Adapt to your specific binary file format.
  42. $value1 = $buffer[0]; // Extract the first byte
  43. if ($value1 > $limit1) {
  44. $extractedValues['value1'] = $value1;
  45. }
  47. $value2 = $buffer[1]; // Extract the second byte
  48. if ($value2 > $limit2) {
  49. $extractedValues['value2'] = $value2;
  50. }
  52. $value3 = $buffer[2]; //Extract the third byte
  53. if ($value3 > $limit3) {
  54. $extractedValues['value3'] = $value3;
  55. }
  59. fclose($fileHandle);
  61. return $extractedValues;
  62. }
  64. // Example usage:
  65. $filePath = 'binary_file.bin'; // Replace with your binary file path
  66. $values = extractBinaryValues($filePath);
  68. // Output the extracted values.
  69. print_r($values);
  71. ?>

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