Increase file upload size limit in PHP-Nginx

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!

You may like to read these posts which explains PHP file upload related config in some details.

Change in Nginx config

Add following line to http{..} block in nginx config:

http {
	#...
        client_max_body_size 100m;
	#...
}