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Code to detect whether the PHP file has BOM header

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Release: 2016-07-25 09:04:27
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  1. //This file is used to quickly test whether the UTF8 encoded file has a BOM added and can be automatically removed

  2. //By Bob Shen

  3. < p>$basedir="."; //Modify the directory that needs to be detected for this behavior. The dot indicates the current directory
  4. $auto=1; //Whether to automatically remove the discovered BOM information. 1 means yes, 0 means no.

  5. //No need to change the following

  6. if ($dh = opendir($basedir)) {
  7. while (($file = readdir($dh)) !== false) {
  8. if ( $file!='.' && $file!='..' && !is_dir($basedir."/".$file)) echo "filename: $file ".checkBOM("$basedir/$file"). "
    ";
  9. }
  10. closedir($dh);
  11. }

  12. function checkBOM ($filename) {

  13. global $auto;
  14. $contents=file_get_contents($filename);
  15. $charset[1]=substr($contents, 0, 1);
  16. $charset[2]=substr($contents, 1, 1);
  17. $charset[3]=substr($contents, 2, 1) ;
  18. if (ord($charset[1])==239 && ord($charset[2])==187 && ord($charset[3])==191) {
  19. if ($auto==1) {
  20. $rest=substr($contents, 3);
  21. rewrite ($filename, $rest);
  22. return ("BOM found, automatically removed.");
  23. } else {
  24. return ("BOM found.");
  25. }
  26. }
  27. else return ("BOM Not Found.");
  28. }

  29. < p>function rewrite ($filename, $data) {
  30. $filenum=fopen($filename,"w");
  31. flock($filenum,LOCK_EX);
  32. fwrite($filenum,$data);
  33. fclose($filenum );
  34. }
  35. ?>

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