Guestbook, checking charset (iso-8859-1)

[dr0n3]

I have a basic guestbook. The problem is that users can enter characters that are not specified in the charset for the page.

<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />

Is there any way to check that the characters in a string meet a specific charset, such as iso-8859-1?

I don't want users entering rubbish characters.

Thanks 🙂

[planetsim]

You could always use another charset type. Such as UTF-8

You can also use the htmlentities, htmlspecialchars functions to use the HTML special Characters.

[dr0n3]

If users enter characters that are not permitted by the charset, the page will not validate.

Using UTF-8 won't stop the problem because users may still enter non UTF-8 characters.

Also, htmlentities and htmlspecialchars are not what I am after. Sure they convert characters to HTML entities, but many of these entities are out of the character set range, causing validation errors.