Detecting illegal characters

[Trilogen]

Hi,

I'm scripting a domain availability search tool. And I just wanted to know how to detect if user is typing unacceptable domain characters such as *"#@ etc..

I'm not exactly sure which function or how to use the function to detect bad characters.

The only legal characters in a domain are 0-9, a-z and "-".

How would I write this in an if statement.

Where if all characters are legal then continue with search. else print "Only legal characters in a domain are 0-9, a-z and - ."; to the user.

[bpat1434]

Here is a prime example of where RegEx shines.

if(ereg("[a-z0-9\-]*", $domain))
{
    // They did everything OK
}

Basically, ereg looks to make sure that the only characters in there are a-z and 0-9, and a hyphen. If it's anything else, it won't allow it.

~Brett