Is there an easy way to increase the maximum file upload size (currently 2 megabytes)?

The file upload size is set in your PHP configuration, php.ini, with the parameter upload_max_filesize.

The setting can be changed in a number of different places depending on your webserver and the method it uses to run PHP.

If your Webserver allows the modification of PHP settings through a .htaccess file (Apache + mod_php) add the following two lines to a .htaccess in the installed directory:

php_value upload_max_filesize 15M
php_value post_max_size 15M

Otherwise you need to modify your php.ini (usually located in /etc/php5/php.ini, but refer to your administrator or distribution manual for the correct location):

upload_max_filesize = 15M
post_max_size = 15M

After modifying the global php.ini you will need to restart the webserver to have changes take effect.

Users with Suhosin might need to increase the suhosin.post.max_value_length value as well.

Red Hat ES users will also want to check (and probably increase) LimitRequestBody in /etc/httpd/conf.d/php.conf, which is set by default to a fairly low value. This directive specifies the number of bytes from 0 (meaning unlimited) to 2147483647 (2GB) that are allowed in a request body.

An updated default FastCGI restriction, which limited the maximum body size of a HTTP request results in internal server errors. You may set new values in your apache, i.e.

<IfModule mod_fcgid.c>
  FcgidMaxRequestLen 26214400
  FcgidConnectTimeout 60
</IfModule>

for 25 MB and 60 sec timeout.

For more details check the support section of your webhost, the documentation for your webserver and the instructions for configuring PHP at www.php.net.