How can I raise the maximum upload file size?

Question

I set up private file directory at /var/www/private to keep upload files from webform and setup permission on directory and files (664 for files, 775 for directories). When I click on upload button and select file, it throw an exception -
"An unrecoverable error occurred. The uploaded file likely exceeded the maximum file size (32 MB) that this server supports."

Solution is running on Drupal 8.3 on VM (Vagrant). Below is screen capture of error message

Appreciate if you have an answer of this bug

Answer 1

This is not particular to the Drupal site but is caused by the hosting (local Vagrant) environment's PHP configuration.

Try increasing these values in php.ini:

upload_max_filesize = 64M 
post_max_size = 64M 
memory_limit = 64M

NOTE: If you are using Webform for anonymous file upload to your site and you are setting high limits on file size like this you are quickly going to fill up a lot of disk space (most likely with spam).

NOTE: After modifying php.ini file(s), you need to restart your HTTP server to use new configuration

See answer on Stackoverflow.