NYCPHP Meetup

[Brian D.]

Same thing goes for strlen(). It won't break, but it reports bytes, so
be aware any validation you're doing using strlen may break. Check out
mb_strlen() for an alternative.

http://us2.php.net/manual/en/function.mb-strlen.php

On Wed, Mar 5, 2008 at 7:25 PM, John Campbell <jcampbell1 at gmail.com> wrote:
> 2008/3/5 Cliff Hirsch <cliff at pinestream.com>:
>
> > Is there a downside to using utf-8?
>
>  No, but there are issues with some string functions.  In php4/5
>  functions like substr() operate on bytes, and may break UTF-8 strings
>  that contain multibyte characters.  I'd search your code for things
>  like "substr" and "pos", and make sure they are not operating on
>  userdata in an unsafe way.
>
>  see:
>  http://www.phpwact.org/php/i18n/utf-8
>
>  Regards,
>  John Campbell
>
>
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