preg_match allowing a-z AND å ä ö ü

[Daniel]

I've been searching the net and Google news groups for a preg_match
expression that will return true on strings containing (uppercase and
lowercase) characters of A-Z, 0-9 and for instance Swedish characters Å Ä Ö.
It should return false on strings containing stuff like -#¤%\"[]()=?&/.

The thing is, I don't want to specifically allow Å Ä Ö, I want a more
general rule in case other characters like ü or ø turn up. Is this possible
to do?

I've tried
preg_match("/^\w+$/", $string)
and
preg_match("/^[[:alpha:]]+$/", $string)

but both returns false on everything except a-z A-Z.

I'm going to use it to test a receiver's name ($to_name) before putting it
in an e-mail header like "$to_name <$to_email>"; The names are entered in a
text field by my users and I want to test the name so it won't mess up the
e-mail header causing the e-mail to fail.

Any help would be greatly appreciated. Thank you.

Daniel

[Pedro Graca]

Re: preg_match allowing a-z AND å ä ö ü

Daniel wrote:[color=blue]
> I've been searching the net and Google news groups for a preg_match
> expression that will return true on strings containing (uppercase and
> lowercase) characters of A-Z, 0-9 and for instance Swedish characters Å Ä Ö.
> It should return false on strings containing stuff like -#¤%\"[]()=?&/.
>
> The thing is, I don't want to specifically allow Å Ä Ö, I want a more
> general rule in case other characters like ü or ø turn up. Is this possible
> to do?
>
> I've tried
> preg_match("/^\w+$/", $string)
> and
> preg_match("/^[[:alpha:]]+$/", $string)
>
> but both returns false on everything except a-z A-Z.
>
> I'm going to use it to test a receiver's name ($to_name) before putting it
> in an e-mail header like "$to_name <$to_email>"; The names are entered in a
> text field by my users and I want to test the name so it won't mess up the
> e-mail header causing the e-mail to fail.
>
> Any help would be greatly appreciated. Thank you.
>
> Daniel[/color]


<quote source="RFC2822 ">
Note: This standard specifies that messages are made up of characters
in the US-ASCII range of 1 through 127. There are other documents,
specifically the MIME document series [RFC2045, RFC2046, RFC2047,
RFC2048, RFC2049], that extend this standard to allow for values
outside of that range. Discussion of those mechanisms is not within
the scope of this standard.
</quote>

So, according to this standard those characters you want to include in
the header part of your email are invalid :)


Anyway, I think it should work if you

<?php setlocale(LC_AL L, 'se_SE'); ?>
I have no idea about the correct locale string ('se_SE') for you.


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..sig