Regular expression, How to allow combination of dot (period) and letters?

Question

I want to allow (.) and (a-zA-Z) letters and _ and - , I have some problems with the (.) ,

Any idea ?

Thanks in advance ,

Ish

Answer 1

[A-Za-z_.-]

is a character class that includes all the characters you mentioned. Inside a character class, it's not necessary to escape the ., and you can avoid escaping the - if you put it first or last.

If numbers are ok, too, you can shorten this to

[\w.-]