Data validation on Birthdate and username?

[Dinocanid]

I'm not too sure on the date checking, but you should be able to prevent special characters in usernames by adding this under "protected function usernamevalidate" in class_registervalidator.php:

PHP Code:

if(preg_match('/[\'^£$%&*()}{@#~?><>,|=_+¬-]/', $username)){

         $this->seterror("Your username cannot contain special characters!");

         return FALSE;

      } 


So it looks like this:

PHP Code:

protected function usernamevalidate($username = ""){
      // The username validator, note its a bit complicate here due to the different mechanism of username check for register and other validators
      $lang = Registry::get("lang");
      if(!$this->emptyvalidate($username)){
         $this->seterror("The field Username is Empty.");
         return FALSE;
      }
      if($username == "SYSTEM"){
         $this->seterror("Cannot use SYSTEM as username.");
         return FALSE;
      }
      if(preg_match('/[\'^£$%&*()}{@#~?><>,|=_+¬-]/', $username)){
         $this->seterror("Your username cannot contain special characters!");
         return FALSE;
      }
      $username = (empty($username))?$this->value['username']:$username;      
      $userexist = $this->datavalidate("users", array("username"), "username = '{$username}'");
      if($userexist == TRUE){
         $this->seterror($lang->user);
         return FALSE;
      }
      else return TRUE;
  } 


I haven't tried it, but I got the answer from here:
http://stackoverflow.com/questions/3...characters-php

EDIT: Thought I should say that this won't/can't do anything about users who already registered with special characters; only new ones.