Tag Archives: registration

Unconfirmed 1.2: non-Network support; delete options

I’ve just tagged version 1.2 of Unconfirmed, my WordPress plugin that allows for easy management of unactivated registrations on your WP site.

Unconfirmed 1.2 has two new, handy features:

  • WordPress non-Network support Previous version of Unconfirmed supported only WP Multisite (Network mode). That made sense, because WP “single” does not have native support for user activation in the same way that MS does. However, BuddyPress, when run on WP “single”, apes Multisite’s activation functions, and in those cases, it makes sense to use Unconfirmed. Version 1.2 introduces support for this kind of setup.
  • A “delete” option A lot of people have asked for a “delete” button, which would allow admins to delete unactivated registrations altogether (usually used in case of spam registrations). In Unconfirmed 1.2, those wishes have been granted. The new version allows you to delete spam registrations, one at a time or in bulk.

Download Unconfirmed from the wordpress.org repo, and follow development at https://github.com/boonebgorges/unconfirmed.

Wildcard email whitelists in WordPress and BuddyPress

Cross-posted on the CUNY Academic Commons Development Blog

WordPress (and before that WPMU) has long had a feature that allows admins to set a whitelist of email domains for registration (Limited Email Registration). On the Commons, we need to account for a lot of different domains, some of which are actually dynamic – but they are all of the form *.cuny.edu. WP doesn’t support this kind of wildcards, but we’ve got it working through a series of customizations.

These first two functions form the heart of the process. The first one hooks to the end of the BP registration process, looks for email domain errors, and then sends the request to the second function, which does some regex to check against the wildcard domains you’ve specified. This is BP-specific, but I think you could make it work with WPMS just by changing the hook name.

function cac_signup_email_filter( $result ) {
	global $limited_email_domains;

if ( !is_array( $limited_email_domains ) )
		$limited_email_domains = get_site_option( 'limited_email_domains' );

$valid_email_domain_check = cac_wildcard_email_domain_check( $result['user_email'] );

if( $valid_email_domain_check ) {
		if ( isset( $result['errors']->errors['user_email'] ) )
			unset( $result['errors']->errors['user_email'] );

return $result;
add_filter( 'bp_core_validate_user_signup', 'cac_signup_email_filter', 8 );

function cac_wildcard_email_domain_check( $user_email ) {
	global $limited_email_domains;

if ( !is_array( $limited_email_domains ) )
		$limited_email_domains = get_site_option( 'limited_email_domains' );

if ( is_array( $limited_email_domains ) && empty( $limited_email_domains ) == false ) { 
		$valid_email_domain_check = false;
		$emaildomain = substr( $user_email, 1 + strpos( $user_email, '@' ) );
		foreach ($limited_email_domains as $limited_email_domain) {
			$limited_email_domain = str_replace( '.', '.', $limited_email_domain);        // Escape your .s
			$limited_email_domain = str_replace('*', '[-_.a-zA-Z0-9]+', $limited_email_domain);     // replace * with REGEX for 1+ occurrence of anything
			$limited_email_domain = "/^" . $limited_email_domain . "/";   // bracket the email with the necessary pattern markings
			$valid_email_domain_check = ( $valid_email_domain_check or preg_match( $limited_email_domain, $emaildomain ) );

return $valid_email_domain_check;

Before WP 3.0, this was enough to make it work. The latest WP does increased sanitization on the input of the limited_email_domains field, however, which makes it reject lines like *.cuny.edu. The following functions add an additional field to the ms-options.php panel that saves the limited domains without doing WP’s core checks. (Beware: bypassing WP’s checks like this means that there are no safeguards in place for well-formedness. Be careful about what you type in the field, or strange things may happen.)

function cac_save_limited_email_domains() {
	if ( $_POST['cac_limited_email_domains'] != '' ) {
		$limited_email_domains = str_replace( ' ', "n", $_POST['cac_limited_email_domains'] );
		$limited_email_domains = split( "n", stripslashes( $limited_email_domains ) );

$limited_email = array();
		foreach ( (array) $limited_email_domains as $domain ) {
				$domain = trim( $domain );
			//if ( ! preg_match( '/(--|..)/', $domain ) && preg_match( '|^([a-zA-Z0-9-.])+$|', $domain ) )
				$limited_email[] = trim( $domain );
		update_site_option( 'limited_email_domains', $limited_email );
	} else {
		update_site_option( 'limited_email_domains', '' );
add_action( 'update_wpmu_options', 'cac_save_limited_email_domains' );

function cac_limited_email_domains_markup() {

<h3><?php _e( 'Limited Email Domains That Actually Work' ); ?></h3>

<table class="form-table">
	<tr valign="top">
		<th scope="row"><label for="cac_limited_email_domains"><?php _e( 'Limited Email Registrations' ) ?></label></th>
			<?php $limited_email_domains = get_site_option( 'limited_email_domains' );
			$limited_email_domains = str_replace( ' ', "n", $limited_email_domains ); ?>
			<textarea name="cac_limited_email_domains" id="limited_email_domains" cols="45" rows="5">
			<br />
			<?php _e( 'If you want to limit site registrations to certain domains. One domain per line.' ) ?>

add_action( 'wpmu_options', 'cac_limited_email_domains_markup' );