Can't upload more than 20 files using Media Image Entities in Drupal 8?

After migrating an older Drupal 6 site with 20,000 media items to Drupal 8, I found a strange problem with image uploads. On the Drupal site, using Image FUpload and Adobe Flash, I could upload up to 99 images in one go. On the new Drupal 8 site, I was only able to upload 20 images, even though I didn't see an error message or any other indication that the rest of the images I had selected through the Media Image upload form were not successfully added.

I could choose 21, 40, or 500 images, but only 20 were ever added to an album at any time.

There were no apparent warnings on the screen, so I just assumed there was some random bug in the Media Image Entity or Media module suite that limited uploads to 20 files at a time.

But due to an unrelated error, I glanced at the PHP logs one day, and noticed the following error message:

[Fri Dec 23 22:05:53.403709 2016] [:error] [pid 29341] [client] PHP Warning:  Maximum number of allowable file uploads has been exceeded in Unknown on line 0, referer:

Quite enlightening!

So looking at the PHP docs for file uploads, it seems the default limit is 20 files. That's a bit low for a photo sharing site, so I decided to lift that limit to 250 for the benefit of family members who are a bit trigger-happy when taking pictures!

I edited php.ini and set the following directive:

max_file_uploads = 250

And now I can upload to my heart's content, without manually batching uploads in groups of 20!


What module do you use in D8 to upload multiple images?

We had this issue arise after updating PHP from 7.2 to 7.4 recently. Apparently, updating does not preserve changes made to the prior version's php.ini file. We were back to default settings, including max_file_uploads = 20. Our new "best practice" is to save a copy of our php.ini file so that following an update, we can restore any custom settings.