如何删除Gravatar bbPress + BuddyPress + Wordpress？

Question

I have bbPress 2.1.2 and BuddyPress 1.6.1 installed on a WordPress 3.4.2 site.

The problem is, on the forums, avatar errors show for users who do not have avatars images in /wp-content/uploads/avatars/ instead of the mystery man.

How do I remove Gravatar completely from WordPress and use BuddyPress' avatars instead? In case a user does not have any avatar yet, a default image should show up.

The source of the erroneous avatars at the moment is like

http://www.gravatar.com/avatar/d41d8cd98f00b204e9800998ecf8427e?d=http://mywebsite.com/forums/wp-content/plugins/buddypress/bp-core/images/mystery-man.jpg&s=80&r=G

Users who have uploaded their avatars properly, the avatars have source like the following:

http://mywebsite.com/forums/wp-content/uploads/avatars/1/d4f01e214d783339fc186ec365307ed1-bpfull.jpg

Answer 1

Please try this code and put it into the your functions.php file in theme:

function myavatar_add_default_avatar( $url ) {
    return get_stylesheet_directory_uri() .'/_inc/images/avatar-member.jpg';
}
add_filter( 'bp_core_mysteryman_src', 'myavatar_add_default_avatar' );

Please use your default image to replace gravatar photo.