If Nginx aborts your connection when uploading large files, you will see something like below in Nginx’s error logs:
[error] 25556#0: *52 client intended to send too large body:
This means, you need to increase PHP file-upload size limit. Following steps given below will help you troubleshoot this!
Changes in php.ini
To change max file upload size to 100MB
Edit…
vim /etc/php5/fpm/php.ini
Set…
upload_max_filesize = 100M post_max_size = 100M
Notes:
- Technically, post_max_size should always be larger than upload_max_filesize but for large numbers like 100M you can safely make them equal.
- There is another variable max_input_time which can limit upload size but I have never seen it creating any issue. If your application supports uploads of file-size in GBs, you may need to adjust it accordingly. I am using PHP-FPM behind Nginx from very long time and I think in such kind of setup, its Nginx to which a client uploads file and then Nginx copies it to PHP. As Nginx to PHP copying will be local operation max_input_time may never create issue. I also believe Nginx may not copy the file but merely hand-over the location of file or descriptor records to PHP!
Change in Nginx config
Add following line to http{..} block in nginx config:
http { #... client_max_body_size 100m; #... }
Note: For very large files, you may need to change value of client_body_timeout parameter. Default is 60s.
Reload PHP-FPM & Nginx
service php5-fpm reload service nginx reload
Changes in WordPress-Multisite
If you are running WordPress Multisite setup, then you may need to make one more change at the WordPress end.
Go to: Network Admin Dashboard >> Settings. Look for Upload Settings
Also change value for Max upload file size
https://rtcamp.com/tutorials/php/increase-file-upload-size-limit/