Setup max file size for php

The file upload size is set in your PHP configuration, php.ini, with the parameter upload_max_filesize. You may change it, if you run e.g. a private wiki (MediaWiki, DokuWiki) or an CMS like WordPress.

Example for Debian

vim /etc/php5/apache2/php.ini

Change from 2M to 10M

; Maximum allowed size for uploaded files.
upload_max_filesize = 10M

You need to reload your apache configuration before you can upload the file.

service apache2 reload