upload_max_size

By running the upload_max_size command, you can set the maximum file upload size for nginx and php to new_upload_size_in_mb.

The following help text is displayed when you run the command followed by -h:

Usage upload_max_size [-h] [new_upload_size_in_mb]

Sets the maximum file upload size for nginx and php to new_upload_size_in_mb.
Without any parameters then it will show the current max upload size