BuddyPress.org

I have a working version now, but the avatar rotates with every page refresh, so it isn’t really permanently assigning a random avatar to users without one.

function myavatar_add_default_avatar( $url )
{
$tmp = glob(‘avatars/*.png’);
$flist = array();
if (is_array($tmp))
{
$flist = array_merge($flist,$tmp);
}
$default_avatar = $flist[array_rand($flist)];
$avatrat_dir_url=get_bloginfo(‘url’);//or what ever is your absolute url for the folder in which you are keeping the avatar
return $avatrat_dir_url.”/”.$default_avatar;
}
add_filter( ‘bp_core_mysteryman_src’, ‘myavatar_add_default_avatar’ );