Mysidia Adoptables Support Forum - Disable certain characters in usernames

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- - Disable certain characters in usernames (http://www.mysidiaadoptables.com/forum/showthread.php?t=4936)

Disable certain characters in usernames

Resolved

Hello!

So despite the very obvious warning I put on my registration page I still have users registering with special characters in their usernames, which makes it so that their profiles become unviewable and makes for some issues.

Is there a way to disable it so that if they attempt to register with a special character in the username it won't register them, but instead gives the warning "Sorry, please only use letters, numbers, or spaces in your username."

OK, so there's this chunk of code;

Code:

      if($username == "SYSTEM"){

         $this->seterror("Cannot use SYSTEM as username.");

         return FALSE;

      }

But I'm wondering if I could do something like this to make it so the only characters that can be entered are alphanumeric and spaces? So if a user tries something like; "user_name" then they'll get the error; "Sorry, you cannot use special characters in your username."

Some folks use this sort of code;

PHP Code:


		
			
if(preg_match('/^[a-zA-Z0-9 ]+$/', $username)) {
}

Do y'all think I'd be able to incorporate that somehow..?

To check that usernames only have letters, numbers, and spaces, find the usernamevalidate() function in classes/class_registervalidator.php and replace the function with 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(preg_match('#^[A-Z0-9 ]+$#i', $username) == FALSE){

         $this->seterror("Usernames can only contain letters, numbers, and spaces.");

         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;

  }

Awesome, thank you!

Also- Pachooooo! <3