Only numbers

wordpress by default allows usernames with numbers only, our plugin allows you to not allow username to contain numbers only (Not allow use only numbers in the username)

I mean only allowing numbers, not letters or any other characters

Edit this file:

wp-content\plugins\restrict-usernames-emails-characters\classes\classe_val.php

and in line 203 replace this:

			if ( preg_match('/^[0-9]+$/i', $login ) || preg_match( '/^\+?\d+$/', $login ) || preg_match( '/^[0 -9]+$/i', $login ) && $this->options('p_space') != 'on' ) {
				if ( $__valid && $this->options('p_num') ) {	
					$this->valid_num = true;
					return $_valid;
				}
			}

by:

			if ( !preg_match('/^[0-9]+$/i', $login )  ) {
				if ( $__valid ) {	
					$this->valid_num = true;
					return $_valid;
				}
			}