When you upload a theme or plugin or anything from PHP application, you may need to increase “upload max file size” via php.ini. But in Shared Hosting Environment, you can’t edit php.ini of the main server. So cPanel is giving us a easy way to do that.
cPanel > Select PHP Version.
After go there, click on the Options Tab.
Increase all of them to maximum limit if you like. Problem solved. Now you can upload big files via PHP.