- fixed #812;

- changed version name;

includes/core/class-validation.php

@@ -19,6 +19,7 @@ if ( ! class_exists( 'um\core\Validation' ) ) {
 		 */
 		function __construct() {
 			$this->regex_safe = '/\A[\w\-\.]+\z/';
+			$this->regex_username_safe = '|[^a-z0-9 _.\-@]|i';
 			$this->regex_phone_number = '/\A[\d\-\.\+\(\)\ ]+\z/';
 
 
@@ -214,12 +215,12 @@ if ( ! class_exists( 'um\core\Validation' ) ) {
 			 * }
 			 * ?>
 			 */
-			$regex_safe_username = apply_filters('um_validation_safe_username_regex',$this->regex_safe );
+			$regex_safe_username = apply_filters( 'um_validation_safe_username_regex', $this->regex_username_safe );
 
 			if ( is_email( $string ) ) {
 				return true;
 			}
-			if ( ! is_email( $string ) && ! preg_match( $regex_safe_username, $string ) ) {
+			if ( ! is_email( $string ) && preg_match( $regex_safe_username, $string ) ) {
 				return false;
 			}
 			return true;

readme.txt

@@ -155,6 +155,11 @@ The plugin works with popular caching plugins by automatically excluding Ultimat
 * To learn more about version 2.1 please see this [docs](https://docs.ultimatemember.com/article/1512-upgrade-2-1-0)
 * UM2.1+ is a significant update to the Member Directories' code base from 2.0.x. Please make sure you take a full-site backup with restore point before updating the plugin
 
+= 2.1.18: May xx, 2021 =
+
+* Bugfixes:
+  - Fixed: Regular expression for registration form and username field (added ability to use spaces) (#812)
+
 = 2.1.17: April 14, 2021 =
 
 * Enhancements:

ultimate-member.php

@@ -3,7 +3,7 @@
 Plugin Name: Ultimate Member
 Plugin URI: http://ultimatemember.com/
 Description: The easiest way to create powerful online communities and beautiful user profiles with WordPress
-Version: 2.1.17
+Version: 2.1.18-alpha
 Author: Ultimate Member
 Author URI: http://ultimatemember.com/
 Text Domain: ultimate-member