Title: help
Last modified: June 24, 2021

---

# help

 *  Resolved [ale8521](https://wordpress.org/support/users/ale8521/)
 * (@ale8521)
 * [4 years, 11 months ago](https://wordpress.org/support/topic/help-869/)
 * Hi, why this is not working?
 *     ```
       add_action('um_submit_form_errors_hook_','um_custom_validate_username', 999, 1);
       function um_custom_validate_username( $args ) {
   
       	global $ultimatemember;
   
           $number = preg_replace('/[^0-9]/', '', $number);
   
       	if ( isset( $args['user_login'] ) && ((!strstr( $args['user_login'], 'E00') && strlen($args['user_login'] =='9')))) {
       		UM()->form()->add_error( 'user_login', 'This user login is not valid.' );
       	}
   
       }
       ```
   
 * thanks for your help.

Viewing 2 replies - 1 through 2 (of 2 total)

 *  Plugin Contributor [Champ Camba](https://wordpress.org/support/users/champsupertramp/)
 * (@champsupertramp)
 * [4 years, 11 months ago](https://wordpress.org/support/topic/help-869/#post-14594314)
 * Hi [@ale8521](https://wordpress.org/support/users/ale8521/)
 * What’s your sample input value?
 * Regards,
 *  Plugin Contributor [Champ Camba](https://wordpress.org/support/users/champsupertramp/)
 * (@champsupertramp)
 * [4 years, 11 months ago](https://wordpress.org/support/topic/help-869/#post-14602175)
 * Hi [@ale8521](https://wordpress.org/support/users/ale8521/)
 * Please feel free to re-open this thread by changing the Topic Status to ‘Not 
   Resolved’ if any other questions come up and we’d be happy to help. 🙂
 * Regards,

Viewing 2 replies - 1 through 2 (of 2 total)

The topic ‘help’ is closed to new replies.

 * ![](https://ps.w.org/ultimate-member/assets/icon-256x256.png?rev=3160947)
 * [Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin](https://wordpress.org/plugins/ultimate-member/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/ultimate-member/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/ultimate-member/)
 * [Active Topics](https://wordpress.org/support/plugin/ultimate-member/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/ultimate-member/unresolved/)
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 * 2 replies
 * 2 participants
 * Last reply from: [Champ Camba](https://wordpress.org/support/users/champsupertramp/)
 * Last activity: [4 years, 11 months ago](https://wordpress.org/support/topic/help-869/#post-14602175)
 * Status: resolved