Re: Is it possible to parse a variable by character?

I still haven't had the time to finish {} and I don't want ppl to "discover" that it works like [] and have them mistakenly use {} for array offsets. Andi At 07:25 PM 4/18/2001 +0900, Yasuo Ohgaki wrote:

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"" <yohgaki@hotmail.com> wrote in message news:OE35Xjaf3mOV9e8L25s00004a67@hotmail.com... 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" <uid0@worldvibe.org> wrote in message news:B70272AA.D54%uid0@worldvibe.org...

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 -- PHP General Mailing List (http://www.php.net/) To unsubscribe, e-mail: php-general-unsubscribe@lists.php.net For additional commands, e-mail: php-general-help@lists.php.net To contact the list administrators, e-mail: php-list-admin@lists.php.net

-- PHP General Mailing List (http://www.php.net/) To unsubscribe, e-mail: php-general-unsubscribe@lists.php.net For additional commands, e-mail: php-general-help@lists.php.net To contact the list administrators, e-mail: php-list-admin@lists.php.net -- PHP Language Mailing List (http://www.php.net/) To unsubscribe, e-mail: php-lang-unsubscribe@lists.php.net For additional commands, e-mail: php-lang-help@lists.php.net To contact the list administrators, e-mail: php-list-admin@lists.php.net -- PHP Language Mailing List (http://www.php.net/) To unsubscribe, e-mail: php-lang-unsubscribe@lists.php.net For additional commands, e-mail: php-lang-help@lists.php.net To contact the list administrators, e-mail: php-list-admin@lists.php.net