HTML Upload MAX_FILE_SIZE does not appear to work

by

MAX_FILE_SIZE is in KB not bytes. You were right, it is in bytes. So, for a limit of 4MB convert 4MB in bytes {1024 * (1024 * 4)} try:

<input type="hidden" name="MAX_FILE_SIZE" value="4194304" />

enter image description here

Update 1

As explained by others, you will never get a warning for this. It’s there just to impose a soft limit on server side.

Update 2

To answer your sub-question. Yes, there is a difference, you NEVER trust the user input. If you want to always impose a limit, you always must check its size. Don’t trust what MAX_FILE_SIZE does, because it can be changed by a user. So, yes, you should check to make sure it’s always up to or above the size you want it to be.

The difference is that if you have imposed a MAX_FILE_SIZE of 2MB and the user tries to upload a 4MB file, once they reach roughly the first 2MB of upload, the transfer will terminate and the PHP will stop accepting more data for that file. It will report the error on the files array.

More Related Contents:

  1. Count and limit the number of files uploaded (HTML file input)
  2. Detecting file upload size on the client side?
  3. Something wrong with PHP
  4. How do i place word restriction on html and php [closed]
  5. Get Data with PHP [closed]
  6. What is the purpose of compiling css/scss? [closed]
  7. Using .htaccess to make all .html pages to run as .php files?
  8. Seo Friendly URL results in CSS IMG and JS not working
  9. How to prevent form resubmission when page is refreshed (F5 / CTRL+R)
  10. How to upload & Save Files with Desired name
  11. Multiple Image Upload PHP form with one input
  12. How do I make a PHP form that submits to self?
  13. PHP – Upload utf-8 filename
  14. How to prevent multiple inserts when submitting a form in PHP?
  15. HTML Scraping in Php [duplicate]
  16. Could not instantiate mail function. Why this error occurring
  17. Equivalent of include() in HTML
  18. file_get_contents() give me 403 Forbidden
  19. PHP ftp_put fails
  20. Dynamic table in HTML using MySQL and php
  21. PHP Warning: move_uploaded_file() unable to move
  22. Converting HTML to PDF (not PDF to HTML) using PHP [closed]
  23. Using PHP to get DOM Element
  24. Sanitizing HTML input
  25. PHP – Secure member-only pages with a login system
  26. Continuing overflowed text in a different div?
  27. Regex matching table rows in HTML [duplicate]
  28. How to keep form values after post [duplicate]
  29. Detect Ajax calling URL
  30. jQuery Mobile: Sending data from one page to the another

Leave a Comment