如何创建不允许符号的正则表达式？

Question

I got a question regarding regexp in general. I'm currently building a register form where you can enter the full name (given name and family name) however I cant use [a-zA-Z] as a validation check because that would exclude everyone with a "foreign" character.

What is the best way to make sure that they don't enter a symbol, in both php and javascript?

Thanks in advance!

Answer 1

The correct solution to this problem (in general) is POSIX character classes. In particular, you should be able to use [:alpha:] (or [:alphanum:]) to do this.

Though why do you want to prevent users from entering their name exactly as they type it? Are you sure you're in a position to tell them exactly what characters are allowed to be in their names?