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Code example of php readfile function downloading files and determining permissions

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2016-07-25 08:58:501198browse
  2. /**
  3. * Application examples of header and readfile functions
  4. * Download files and determine permissions
  5. * edit bbs.it-home.org
  6. */
  7. $file = get_file_address();// The real address of the file (supports url, but url is not recommended)
  9. if (file_exists($file ))
  10. {
  11. header('Content-Description: File Transfer');
  12. header('Content-Type: application/octet-stream');
  13. header('Content-Disposition: attachment; filename='.basename($ file));
  14. header('Content-Transfer-Encoding: binary');
  15. header('Expires: 0');
  16. header('Cache-Control: must-revalidate, post-check=0, pre-check= 0');
  17. header('Pragma: public');
  18. header('Content-Length: ' . filesize($file));
  19. ob_clean(); //Pay attention to the call of this function, clear but not close the output cache , otherwise the first two characters of the downloaded file will be 0a
  20. flush();
  21. readfile($file); // Output file content
  22. }
  23. ?>
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