String Validation

[Kayzio]

I have created a user system and when a user signs up a confirmation email is sent to them with a link to activate their account. Their activation code which is in the link is a random string which has been sha512 hashed. My question is will a sha512 hash always validate as ctype_alnum()? I have noticed so far that it will so I assume this is true just looking for confirmation, thanks,
Matt

[hexburner]

You got it at the right end.

[Kayzio]

Thanks for confirming for me