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How to batch detect and remove file BOM headers with PHP

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2016-07-25 08:53:18845browse
  2. if (isset($_GET['dir'])) { //设置文件目录
  3. $basedir = $_GET['dir'];
  4. } else {
  5. $basedir = '.';
  6. }
  7. $auto = 1;
  8. checkdir($basedir);
  9. function checkdir($basedir)
  10. {
  11. if ($dh = opendir($basedir)) {
  12. while (($file = readdir($dh)) !== false) {
  13. if ($file != '.' && $file != '..') {
  14. if (!is_dir($basedir . "/" . $file)) {
  15. echo "filename: $basedir/$file " . checkBOM("$basedir/$file") . "
    ";
  16. } else {
  17. $dirname = $basedir . "/" . $file;
  18. checkdir($dirname);
  19. }
  20. }
  21. }
  22. closedir($dh);
  23. }
  24. }
  25. function checkBOM($filename)
  26. {
  27. global $auto;
  28. $contents = file_get_contents($filename);
  29. $charset[1] = substr($contents, 0, 1);
  30. $charset[2] = substr($contents, 1, 1);
  31. $charset[3] = substr($contents, 2, 1);
  32. if (ord($charset[1]) == 239 && ord($charset[2]) == 187 && ord($charset[3]) == 191) {
  33. if ($auto == 1) {
  34. $rest = substr($contents, 3);
  35. rewrite($filename, $rest);
  36. return ("BOM found, automatically removed.");
  37. } else {
  38. return ("BOM found.");
  39. }
  40. } else
  41. return ("BOM Not Found.");
  42. }
  43. function rewrite($filename, $data)
  44. {
  45. $filenum = fopen($filename, "w");
  46. flock($filenum, LOCK_EX);
  47. fwrite($filenum, $data);
  48. fclose($filenum);
  49. }
  50. ?>
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