I'm fairly new to minibb would like a bit of help solving this problem.

I have customized the new user registration page so that a user would need to enter a valid reference number ( eg. like a driving license number). I need to validate this number from the database and the idea is that only users with a valid number will be able to register with my site.

Obviously before registering user details I need to do the validation part and wondering where exactly should i include this function?

any help will be greatly appreciated.

thanks

It depends on how have you customized the new user registration page.

If you've modified bb_func_regusr.php you are already broke the core file and that means you may break it further. Probably before the condition which says

you need to put your own piece of code which will perform kind of validation and then set $correct's variable value to any except 0, if validation do not pass. You may put your own warning message under $l_userErrors[XX] of the language pack where XX stays for the error num of $correct.

Also, you may put such validation code as a plugin under bb_plugins_user.php and it could work non-destructive way.