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How to batch detect and remove file BOM headers with PHP

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WBOYOriginal
2016-07-25 08:53:18835browse
  1. if (isset($_GET['dir'])) { //设置文件目录
  2. $basedir = $_GET['dir'];
  3. } else {
  4. $basedir = '.';
  5. }
  6. $auto = 1;
  7. checkdir($basedir);
  8. function checkdir($basedir)
  9. {
  10. if ($dh = opendir($basedir)) {
  11. while (($file = readdir($dh)) !== false) {
  12. if ($file != '.' && $file != '..') {
  13. if (!is_dir($basedir . "/" . $file)) {
  14. echo "filename: $basedir/$file " . checkBOM("$basedir/$file") . "
    ";
  15. } else {
  16. $dirname = $basedir . "/" . $file;
  17. checkdir($dirname);
  18. }
  19. }
  20. }
  21. closedir($dh);
  22. }
  23. }
  24. function checkBOM($filename)
  25. {
  26. global $auto;
  27. $contents = file_get_contents($filename);
  28. $charset[1] = substr($contents, 0, 1);
  29. $charset[2] = substr($contents, 1, 1);
  30. $charset[3] = substr($contents, 2, 1);
  31. if (ord($charset[1]) == 239 && ord($charset[2]) == 187 && ord($charset[3]) == 191) {
  32. if ($auto == 1) {
  33. $rest = substr($contents, 3);
  34. rewrite($filename, $rest);
  35. return ("BOM found, automatically removed.");
  36. } else {
  37. return ("BOM found.");
  38. }
  39. } else
  40. return ("BOM Not Found.");
  41. }
  42. function rewrite($filename, $data)
  43. {
  44. $filenum = fopen($filename, "w");
  45. flock($filenum, LOCK_EX);
  46. fwrite($filenum, $data);
  47. fclose($filenum);
  48. }
  49. ?>
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