Remove the login form from completed registration

In the case of moderated registration, where the user may not receive access to the site right away, you may find that you want to show the successful registration message, but eliminate the login form that shows below it by default.  Here is a method to do that using the wpmem_login_form filter.

When a user has completed registration, the value of $wpmem->regchk will be “success”.  If you test for that value and it is “success”, return an empty string for the form.  If it is anything else, return the form untouched.  That process looks like this:

add_filter( 'wpmem_login_form', 'my_login_form_filter' );
function my_login_form_filter( $form ) {
	global $wpmem;
	if( $wpmem->regchk == 'success' ) {
		// if we have just registered a user, return empty $form
		return '';
	} else {
		// otherwise return the $form untouched
		return $form;
	}
}

Same as above, but more concise:

add_filter( 'wpmem_login_form', 'my_login_form_filter' );
function my_login_form_filter( $form ) {
    global $wpmem;
    return ( 'success' == $wpmem->regchk ) ? '' : $form;
}