How can I test if an input field contains foreign characters?

Posted by zeckdude on Stack Overflow See other posts from Stack Overflow or by zeckdude
Published on 2010-03-23T11:34:42Z Indexed on 2010/03/23 11:43 UTC
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Filed under:

php

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JavaScript

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regex

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validation

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unicode

I have an input field in a form. Upon pushing submit, I want to validate to make sure the user entered non-latin characters only, so any foreign language characters, like Chinese among many others. Or at the very least test to make sure it does not contain any latin characters.

Could I use a regular expression for this? What would be the best approach for this?

I am validating in both javaScript and in PHP. What solutions can I use to check for foreign characters in the input field in both programming languages?

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