Disable special characters in username

Hello, i know that for disable special characters in username i should use a Regular Expression.

I need a Regular Expression that allow all characters of an english/european keyboard (for example A-Z 0-9 and|!"£$%&/()[]{}~=?^'ìè+ùàò,.-é*§°ç;:_@#<>€ and spaces too) but not special characters like that αßу ♥, etc.

What Regular Expression should i use to do that?
Thanks in advance

Hello Fabio ,

You can use one of the following that suits your needs

Code:

^[A-Z]+$ - Characters from A-Z only
^[A-Z ]+$ - Characters from A-Z including space
^[A-Z0-9 ]+$ - Alphanumeric characters including space
^((?!&#\d+;)[\x20-\x7E])+$ - ASCII characters from 32-127

Code:

^((?!&#\d+;)[\x20-\x7E])+$

That's good for me but i need to allow also ° § ç and accented letters like éèìòàù. How can i do?