[..Chris]

Well currently I have a script that uploads files and displays the URL. That's about all I really want. Only one thing I don't know how to do though. When theres a URL with the same name, it simply over writes the file.

Something that could stop that from happening is if I rename the uploaded files to a random 8-10 number/letter combonation. For example, if someone uploaded a file named my_photo.png, it should be renamed to 8a1f2e55se.png.

Any help is appreciated.

[ruteckycs]

The easiest way I have found to solve this problem is to upload the file with the original name and then append a 4 digit random number to the end of the file name.

so

picture.jpg

becomes

picture5489.jpg

This makes it extremely unlikely that files will overwrite because not only must the file name be the same, but the 4 digit number would have to be the same, so someone would have to upload picture.jpg 9999 before a overwrite is guaranteed.

[DaiLaughing]

You should already be using the FILES to get the old name for the file:

PHP Code:

$oldname=$_FILES['file01']['name']; 

so just add a number to that as ruteckycs said. You might need to explode() the old name (be careful to allow for multiple dots in the name). Then add the number and implode() it back together.

[Nico]

PHP Code:

$filename  = $_FILES['file']['name'];

$extension = end(expode('.', $filename));

$chars = 'abcdefghijklmnopqrstuvwxyz012346789';



do

{

    $filename = sprintf('%s.%s', substr(0, 10, str_shuffle($chars)), $extension);

}

while (is_file("path/to/files/{$filename}")); 

... untested, but might work.

[wirehopper]

Rather than a random number, I'd use the time.

(Sample code - in use)

PHP Code:

        $sImage='tmp/'.time();

        shell_exec('convert -comment "Generated by http://wirehopper.com/design/banner.php" '

                .$sList.' +append -unsharp 0x.2 '

                .' +flatten -quality 100 '

                .$sImage.'.png');