is that a stupid question (I am not sure myself), but maybe someone could assure me of it 
when you activate Buddypress, you enable this function
function bp_get_signup_page() {
global $bp; if ( bp_has_custom_signup_page() )
$page = $bp->root_domain . '/' . BP_REGISTER_SLUG;
else
$page = $bp->root_domain . '/wp-signup.php';</p>
return apply_filters( 'bp_get_signup_page', $page );
}
which redirects your wp-signup.php page to your BP_REGISTER_SLUG.
in order to change that url slug ~ modify your register slug in your wp-config.php by adding this line.
define( 'BP_REGISTER_SLUG', 'whatever_you_want_to_call_it_no_spaces_or_weird_characters' );
above the line. /* That’s all, stop editing! Happy blogging. */
I just noticed I failed to read you entire question there. Correct, they will target wp-signup.php and you can modify this file name too, if you wish. It is a bit involved though and may I suggest this article if you would like detailed information about how to do so ~ http://wpmu.tripawds.com/2009/12/12/the-ongoing-fight-against-spam-blogs/
keep in mind those instructions are for MU 2.8.6 and if you decide to edit wp-signup.php ~ don’t forget to change it in these places ~ wp-signup.php, wp-login.php,wpmu-settings.php and bp-core/bp-core-templatetags.php
.. and remember that anytime you ‘hack’ the core, you’ll eventually need to keep up with those edits for when it comes time to upgrade since many of those filenames are going to be changing in the upcoming 3.0 release.
Thanks – you are very helpful!
Do you know WHY it is important, that in Subblogs the wp-signup.php instead of the register-slug is called?
Because you can’t sign up directly to a member blog in MU, you must sign up on the main site first.
Yes, but Why doesnt it Show everywhere just the Custom BP slug (As on rootblog)? Why the redirection?
To make it clear (excuse my english):
Why: Blog.org/Wp-signup.php
instead of: Blog.org/register
?
do you have buddypress enabled as a sitewide plugin? the registration is a function of wpmu and the register slug is a function of buddypress. If you have blogs that don’t have buddypress installed as a plugin, they will not redirect the user to the BP_REGISTER_SLUG
Yes it is sitewide and I think it is good that they finally go to the register-slug. But maybe the sitewide/ Not-sitewide Option is an answer… I guess after all, it is not too important. Thx for your efforts!
I’m having this same problem, I think. Since upgrading to 1.2, my custom BP_REGISTER_SLUG doesn’t work anywhere other than the root blog buddybar. Other blogs and login widget all direct to blank wp-signup.php page. http://injersey.com
Any ideas?
This problem comes from the bp_has_custom_signup_page function.
It checks to see if your theme can locate_template( array( 'register.php' ), false ) or locate_template( array( '/registration/register.php' ), false ) )
Since your child theme has neither of those files, naturally it will return false and give you wp-signup.php as the link. To counter this, BuddyPress attempts to be smart and redirect to BP_REGISTER_SLUG.
If you always want to bypass this check all together, you could try putting this in your bp-custom.php file…
function bp_custom_get_signup_page( $page ) {
global $bp;
return $bp->root_domain . '/' . BP_REGISTER_SLUG;
}
add_filter( 'bp_get_signup_page', 'bp_custom_get_signup_page' );
Note that bp_get_activation_page and bp_has_custom_activation_page work the same way, and the same rules apply if for some reason you want to bounce people from a different activation page.
Hey JJJ,
Tried this out on an install where BP is setup in a sub blog on WPMU 2.9.2.
Didn’t work on the root blog. The root blog had its own wp-signup.php page.
For now, I’m using a rewriterule in .htaccess and redirecting to the BP subblog’s register page.
I’ve been getting pummeled with spam signups ever since the BP_REGISTER_SLUG stopped working throughout the site. I used R-A-Y’s idea of just having an .htaccess redirect. Just curious: If others have taken that approach, does it indeed cut down on spam signups?
Didn’t work on the root blog. The root blog had its own wp-signup.php page.
For now, I’m using a rewriterule in .htaccess and redirecting to the BP subblog’s register page.
Any more detail on this please. What to put in .htaccess in this situation
