Invalidate username with spaces in BuddyPress

Found this great BuddyPress snippet by Remkus de Vries. Normally in BuddyPress when registering if you have a space in the username BuddyPress will automatically replace the space with an _underscore. This snippet rather than adding the underscore will return an error allowing the user to change the username. In my opinion this is a much better option, creating the username with an underscore without notice is not great. Thanks for the great snippet Remkus de Vries checkout his Github profile here.

Code Snippet:

add_action( 'bp_loaded','bpdev_remove_bp_pre_user_login_action') ;
* BuddyPress replaces the space with '-' which is not known to the user
* We remove the attached function to stop BP from circumventing the space in username
function bpdev_remove_bp_pre_user_login_action(){

remove_action( 'pre_user_login', 'bp_core_strip_username_spaces' );

add_filter( 'validate_username','bpdev_restrict_space_in_username',10,2) ;
* add a filter to invalidate a username with spaces
function bpdev_restrict_space_in_username( $valid,$user_name ){

//check if there is an space
if ( preg_match('/\s/',$user_name ) )

//if yes, then we say it is an error
return false;

//otherwise return the actual validity
return $valid;

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