I have changed the upload_max_filesize and the max body size in my php.ini to 15 MB. It used to be 2 MB. Drupal displays the max file size correctly, but when I try to upload files bigger than 2 MB - the old limit - I get an Ajax Error, telling me the entity is too large. Any idea where this comes from?

  • 1
    Have you changed the same on your web server?
    – Clive
    Commented Jan 15, 2015 at 11:11
  • Ah, it might also need a change in my Apache? This is a good hint. Unfortunately I don't have access to the server config. Do you happen to know how I can check it in PHP? Commented Jan 15, 2015 at 11:17
  • 2
    Yeah but only maybe :) Have you set all possible vars in php.ini? You can have: upload_max_filesize, post_max_size, and suhosin.post.max_value_length (if that's active). I believe both of the first two need to be set for things to take effect
    – Clive
    Commented Jan 15, 2015 at 11:20
  • They are both set to 15 MB. Commented Jan 15, 2015 at 11:25
  • 1
    It could well need changing at web server level then, might be an idea to get in touch with your sysadmin and ask how to proceed
    – Clive
    Commented Jan 15, 2015 at 11:26

1 Answer 1


Just for documentation I'd like to add my findings here. I had this issue in Drupal 8, but I guess the Drupal version can be neglected to answer this question.


As @Clive already mentioned it in the comments to the question it's definitely worth a look under /admin/reports/status/php if the Suhosin PHP extension is enabled.

In https://www.drupal.org/node/725056 people suggest to disable this extension completely, but it's maybe better as @Clive suggested to simply override one of its parameters by editing your php.ini. Or by setting this in settings.php – if that is possible at all – via ini_set('suhosin.post.max_value_length', '-1'); or something like that. Maybe it's a different parameter you have to override.

Or Apache

If there's no Suhosin extension enabled, you may find this forum post valuable: https://www.drupal.org/forum/support/post-installation/2015-04-07/ajax-error-when-uploading-large-files where it's suggested to disable or reconfigure Apache's mod_security security mod.


Last but not least you could simply try to circumvent Ajax completely by unbinding the event handler for the submit button, or by removing it completely.

Drupal 7

// Disable ajax upload for file field
drupal_add_js("jQuery(function() { jQuery('#edit-field-image :submit').unbind(); });", 'inline');

Source: How do I disable ajax on file fields?

Drupal 8

(function ($, Drupal) {
  Drupal.behaviors.autokill = {
    attach: function (context, settings) {
      // $('.form-managed-file > input.form-submit').remove();
      $submit_button = $('.form-managed-file > input.form-submit');
})(jQuery, Drupal);

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