Regex to allow A-Z, - and '

Question

I am trying to get this Regex to work to validate a Name field to only allow A-Z, \' and -.

So far I am using this which is working fine apart from it wont allow an

Answer 1

if (preg_match("/^[A-Z'-]+$/",$firstname)) {
    // do something
}

The caret ^ inside a character class [] will negate the match. The way you have it, it means if the $firstname contains characters other than a-z, A-Z, ', and -.