PHP implementation of File download (multiple file format) code

Source: Internet
Author: User
  1. /**

  2. * File Download
  3. * Multiple file formats, including PDF, zip, gif, JPG, MPEG, Word, etc.
  4. * Edit bbs.it-home.org
  5. */
  6. function Dl_file ($file) {
  7. First, see if the file exists
  8. if (!is_file ($file)) {die ("404 File Not found!");}

  9. Gather relevent info about file

  10. $len = FileSize ($file);
  11. $filename = basename ($file);
  12. $file _extension = Strtolower (substr (STRRCHR ($filename, "."), 1);

  13. This would set the Content-type to the appropriate setting for the file

  14. Switch ($file _extension) {
  15. Case "PDF": $ctype = "Application/pdf"; Break
  16. Case "EXE": $ctype = "Application/octet-stream"; Break
  17. Case "Zip": $ctype = "Application/zip"; Break
  18. Case "Doc": $ctype = "Application/msword"; Break
  19. Case "xls": $ctype = "application/vnd.ms-excel"; Break
  20. Case "ppt": $ctype = "Application/vnd.ms-powerpoint"; Break
  21. Case "gif": $ctype = "Image/gif"; Break
  22. Case "png": $ctype = "Image/png"; Break
  23. Case "JPEG":
  24. Case "jpg": $ctype = "image/jpg"; Break
  25. Case "MP3": $ctype = "Audio/mpeg"; Break
  26. Case "wav": $ctype = "Audio/x-wav"; Break
  27. Case "MPEG":
  28. Case "MPG":
  29. Case "MPE": $ctype = "Video/mpeg"; Break
  30. Case "mov": $ctype = "Video/quicktime"; Break
  31. Case "avi": $ctype = "Video/x-msvideo"; Break

  32. The following is for extensions that shouldn ' t is downloaded (sensitive stuff, like PHP files)

  33. Case "PHP":
  34. Case "htm":
  35. Case "HTML":
  36. Case ' txt ': Die ("cannot is used for". $file _extension. "Files!"); Break

  37. Default: $ctype = "Application/force-download";

  38. }

  39. Begin Writing Headers

  40. Header ("Pragma:public");
  41. Header ("expires:0");
  42. Header ("Cache-control:must-revalidate, Post-check=0, pre-check=0");
  43. Header ("Cache-control:public");
  44. Header ("Content-description:file Transfer");
  45. Use the switch-generated content-type
  46. Header ("Content-type: $ctype");

  47. Force the Download

  48. $header = "content-disposition:attachment; Filename= ". $filename."; ";
  49. Header ($header);
  50. Header ("Content-transfer-encoding:binary");
  51. Header ("Content-length:". $len);
  52. @readfile ($file);
  53. Exit
  54. }
  55. ?>

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