Re: [PHP-LANG] [PHP] Is it possible to parse a variable by character?

Someone mentioned $str[offset] will be depreciated in the future in php-general.
$str{offset} can be used to access char in string.

I wonder why this is not in the manual some where obvious place.

--
Yasuo Ohgaki


""Yasuo Ohgaki"" <[email protected]> wrote in message
news:[email protected]...
> It does not allow cross post to news server.... Posting again.
>
> [Cross post to php-lang/php-general]
> Regular expression functions can do the job and already have reply.
>
> Answer for the original question: How to access string by character.
>
> I'm not sure if accessing string as array is going to be depreciated or not.
> (Or is it already depreciated???)
> But you could do
>
> $str = 'abc';
> for ($i = 0; $i < strlen($i); $i++) {
>   echo $str[$i];
> }
>
> It prints characters in string one by one.
>
> I also not sure behavior of following code is defined or not.
> (It's used to be undefined. You probably should not rely on this.)
>
> $str = 'abc';
> $str[0] = 'X';
>
> You may get
> $str = 'Xbc' or $str[0] = 'X'.
>
> Anyone knows current status on this???
>
> Regards,
> --
> Yasuo Ohgaki
>
>
> "Sean Coyle" <[email protected]> wrote in message
> news:B70272AA.D54%[email protected]...
> > Hey there guys,
> >
> >     This may seem like a dumb question, but I have to ask it anyway.
> >
> > I have a form in one of my php based scripts that allows for file uploads.
> > I recently noticed a potential issue if people upload files containing
> > anything else but the standard characters ([_a-z0-9-]+(\.[_a-z0-9-]).
> >
> >     I am not sure if this can be done, but what I need to do is parse this
> > variable (lets call it $file_name) by character looking for anything save
> > letters a-z (A-Z) and numbers 0-9.  Any arrangements of numbers, letters and
> > full stops (.) are to be permitted, and if any character does not meet those
> > specifications, that single character should be converted to an underscore.
> >
> >     Any ideas on how I can go about doing something like this?
> >
> > BTW: (Some background info)  I examined the average validate e-mail idea,
> > however, rather than reject the string, I would like to be able to 'replace'
> > the offending character.
> >
> > Thanks in advance,
> >
> > Sean
> >
> >
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