SamuelDr a écrit :
SamuelDr a écrit :
Hi back,
Manuel Lemos wrote :
Hello,
on 01/28/2006 08:31 PM SamuelDr said the following:
Hi !
I'm trying to develop something in PHP.
I have a list of file, and I want to know if I can have a unique
identifier for each files. What I mean, is:
I have my files:
test.txt
test2.txt
I would like them to return a unique something... anything...
tempnam ?
No, actually, I do not want to create a new file, I want to associate
a certain file to a certain row in a DB. I want to do some windows
desktop like web application for active desktop, and want to know if
there could be some sort of way to have a unique identifier to each file.
I would want this because, take this example in account :
I have dowloaded a file, movie1.avi . I delete it. 2 hours later (the
wipe in the DB for old file entries is not done) I download another
file with the same name. It would be place at the place of the old one
! Maybe by checking the creation date, and the filename, that would be
possibkle... only quirks : if you rename the file not from the web
interface... it would place itself like a new icon.
I have received this in my mail inbox... I saw that it was not there :
> I can think of that would get you a unique ID for a file that does not
> rely on the name being unique...
> 1) filename + creation date
> 2) filename + md5 hash of the contents
the first would be possible... I think.
But the second, if someone modify its files, they would get back to
their default position.
Thanks anyway !
I have received this in my inbox :
SamualDr,
You could get an MD5 hash of the file. It is extremely difficult for two
different files to have the same hash.
Paul
It would be a good idea if my files were not meant to be modyfied, but
it seems that files on the desktop WILL be modified... So, i'm still
looking for something.
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