Generate unique string

[houssam_ballout]

 

Hello,

I had a form in which users can upload their photos, but if 2 files had the same name, then it won't upload.

I need to make the file names, something like the one downloaded from facebook (in which filenames can get their string name using some php code) which is a lengthy.

Any help?

Thanks

[TeddyKiller]

$_SESSION['id'] . time() . $filename;

example

111249231941myimage.jpg

Although you might want to stick some hypens between id, time and filename. So you can use an explode to seperate it and get the actual image name

[houssam_ballout]

I need more explanation for that

its a simple website for uploading images, why do I need session?

[TeddyKiller]

The session is the logged in users id. (Will need to be changed to suit your needs)

So.. for definately more than 1 user cannot have the same file uploaded, as it'll have the users unique ID in it.

As for the time() this gives it a unique timestamp, for the sake of duplication of the image. (Users may have the same filename on two images for example, the timestamp will allow users can upload 2 pics with the same filename)

[houssam_ballout]

I will try to use the time stamp & file name, cause I don't have a place for users to login.

Thanks