A way to deny names that are already in use?

[GeneticAlpha]

Is there a way for the system to check if there is a user with the same nickname or not and deny duplicates names to be used? I know it's possible, I just don't know how to set this up. Can anyone help me make this?

 

[Hall of Famer]

You mean duplicate nickname? Maybe at account settings, inside the method profile(), try to change this line:

        if($mysidia->input->post("submit")){
            $mysidia->db->update("users_profile", array("avatar" => $mysidia->input->post("avatar"), "nickname" => $mysidia->input->post("nickname"), "gender" => $mysidia->input->post("gender"), "color" => $mysidia->input->post("color"), "bio" => $mysidia->input->post("bio"), "favpet" => $mysidia->input->post("favpet"), "about" => $mysidia->input->post("about")), "username = '{$mysidia->user->username}'");
            return;
        }

To:

        if($mysidia->input->post("submit")){
            $nicknameExists = $mysidia->db->select("users_profile", ["nickname"], "nickname = '{$mysidia->input->post("nickname")}'")->fetchColumn();
            if($nicknameExists) throw new Exception("Nickname is already taken, please use a different one.");
            $mysidia->db->update("users_profile", array("avatar" => $mysidia->input->post("avatar"), "nickname" => $mysidia->input->post("nickname"), "gender" => $mysidia->input->post("gender"), "color" => $mysidia->input->post("color"), "bio" => $mysidia->input->post("bio"), "favpet" => $mysidia->input->post("favpet"), "about" => $mysidia->input->post("about")), "username = '{$mysidia->user->username}'");
            return;
        }

The code above assumes clean installation of Mys v1.3.5(the version you are using I believe). If you have modified the file and the method profile(), then you need to just add the nicknameExists check to where it fits in your customized code.