Add option to prevent certain usernames

Defaults to ‘anonymous’

qa-include/app/options.php

@@ -436,6 +436,10 @@ function qa_default_option($name)
 			$value = qa_lang_html_sub('options/default_terms', qa_html(qa_opt('site_title')));
 			break;
 
+		case 'block_bad_usernames':
+			$value = qa_lang_html('main/anonymous');
+			break;
+
 		case 'custom_sidebar':
 			$value = qa_lang_html_sub('options/default_sidebar', qa_html(qa_opt('site_title')));
 			break;

qa-include/lang/qa-lang-options.php

@@ -45,6 +45,7 @@ return array(
 	'avatar_q_page_q_size' => 'Avatar size on questions:',
 	'avatar_store_size' => 'Maximum size for storing avatars:',
 	'avatar_users_size' => 'Avatar size on top users page:',
+	'block_bad_usernames' => 'Disallowed usernames - separate by spaces or commas:',
 	'block_bad_words' => 'Censored words - separate by spaces or commas:',
 	'block_ips_write' => 'Blocked IP addresses - separate by spaces or commas:',
 	'caching_catwidget_time' => 'Cache category widget for:',

qa-include/lang/qa-lang-users.php

@@ -63,6 +63,7 @@ return array(
 	'email_required' => 'Email address required - not public',
 	'forgot_link' => 'I forgot my password',
 	'full_name' => 'Full name',
+	'handle_blocked' => 'Username is disallowed - please try another',
 	'handle_empty' => 'Username must not be empty',
 	'handle_exists' => 'Username is taken - please try another',
 	'handle_has_bad' => 'Username may not contain: ^',

qa-include/pages/admin/admin-default.php

@@ -322,7 +322,7 @@ switch ($adminsection) {
 			require_once QA_INCLUDE_DIR . 'util/image.php';
 
 			array_push($showoptions, 'show_custom_register', 'custom_register', 'show_register_terms', 'register_terms', 'show_notice_welcome', 'notice_welcome', 'show_custom_welcome', 'custom_welcome',
-				'', 'allow_login_email_only', 'allow_change_usernames', 'register_notify_admin', 'suspend_register_users',
+				'', 'allow_login_email_only', 'allow_change_usernames', 'register_notify_admin', 'suspend_register_users', '', 'block_bad_usernames',
 				'', 'allow_private_messages', 'show_message_history', 'page_size_pms', 'allow_user_walls', 'page_size_wall',
 				'', 'avatar_allow_gravatar');
 
@@ -747,6 +747,7 @@ else {
 						break;
 
 					case 'block_bad_words':
+					case 'block_bad_usernames':
 						require_once QA_INCLUDE_DIR . 'util/string.php';
 						$optionvalue = implode(' , ', qa_block_words_explode($optionvalue));
 						break;
@@ -1243,6 +1244,7 @@ foreach ($showoptions as $optionname) {
 				break;
 
 			case 'block_bad_words':
+			case 'block_bad_usernames':
 				$optionfield['style'] = 'tall';
 				$optionfield['rows'] = 4;
 				$optionfield['note'] = qa_lang_html('admin/block_words_note');

qa-include/plugins/qa-filter-basic.php

@@ -52,6 +52,12 @@ class qa_filter_basic
 		if (qa_strlen($handle) > QA_DB_MAX_HANDLE_LENGTH) {
 			return qa_lang_sub('main/max_length_x', QA_DB_MAX_HANDLE_LENGTH);
 		}
+		// check for banned usernames (e.g. "anonymous")
+		$wordspreg = qa_block_words_to_preg(qa_opt('block_bad_usernames'));
+		$blocked = qa_block_words_match_all($handle, $wordspreg);
+		if (!empty($blocked)) {
+			return qa_lang('users/handle_blocked');
+		}
 	}
 
 	public function filter_question(&$question, &$errors, $oldquestion)