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Posted by Kimmo Laine on 03/14/06 10:41
"greg" <greg@no-spam.org> wrote in message
news:44166b72$0$7933$636a55ce@news.free.fr...
>> In a sense he is right, it is not really straightforward to make the
>> distinction, if you strictly mean the ascii character set.
>>
>> Binary just means that it consists of binary patterns or sequence of
>> bits, varied in length and meaning. The content of a binary file only
>> makes sense to an application which knows what the sequence of bits
>> means. When a file is viewed in a text-editor, then the data is (possibly
>> mistakenly) chopped up in 8-bits (or whatever), and the corresponding
>> symbol of that value is displayed, which may or may not make any sense at
>> all. Strictly speaking, the only difference between ascii and non-ascii
>> would be whether or not each chunk of bits is *intended* to correspond to
>> a specific symbol in the Ascii character table.
>>
>> If you by ascii generally mean plain readable/printable text, not
>> necessarilly limited to ascii, then there is tools that could help you.
>>
>> http://dk2.php.net/mime_content_type
>> http://pecl.php.net/package/fileinfo
>>
>> If you are on a linux/unix, check:
>> http://www.freebsd.org/cgi/man.cgi?query=file
>>
>> You could just ignore the subtype, and only distinguish on mediatype
>> between text and everything else.
>>
>> /Bent
>
> Thank you for these explanations.
> In fact, I should have told why I want know make the difference between
> ascii and binary files.
> I have a list of files to send via FTP from a local machien to a remote
> server.
> the ftp_put function needs an argument that can be FTP_ASCII or
> FTP_BINARY.
> I don't know how to choose dynamicaly this argument as the must upload
> various file types.
I suppose you could just send binary always.
--
"En ole paha ihminen, mutta omenat ovat elinkeinoni." -Perttu Sirviφ
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