Question

I want to put some good avatar instead of the wordpress default. How can i do this without touching the core.

Answer 1

It’s very easy, you don’t have touch the core. Just use the avatar_defaults filter.

There is post on that here

/**
* add a default-gravatar to options
*/
if ( !function_exists('fb_addgravatar') ) {
function fb_addgravatar( $avatar_defaults ) {
$myavatar = get_bloginfo('template_directory') . '/images/avatar.gif';
$avatar_defaults[$myavatar] = 'people';

$myavatar2 = get_bloginfo('template_directory') . '/images/myavatar.png';
$avatar_defaults[$myavatar2] = 'wpengineer.com';

return $avatar_defaults;
}

add_filter( 'avatar_defaults', 'fb_addgravatar' );
}