names for file uploads

svoec

I have a site where I am allowing users to do file uploads. --

I want to be able to sort the uploads by the time they were uploaded

I was thinking I could use a timestamp for the name of the file, this would reducce the chance of duplicates, and give me the ability to tell which came first...

do you guys see any holes in this ??

what are the chances of 2 users hitting the submit button at the EXACT same milisecond??

rpanning

I have a script that lists a directory by file modification time. http://www.phpbuilder.com/board/showthread.php?s=&threadid=10222157 The script below will list all the files listed by modification time in a certain directory. Hope this helps!

<?php
$folder = ".";  // Enter the absolute path to the dir to list (Ex: UNIX /var/folder  Windows c:/wwwroot/folder
$fileArray = array();
if ($handle = opendir($folder)) {
  while (false !== ($file = readdir($handle))) {
    if (is_file($file)) {
      $fileArray["$file"] = filemtime("$folder/$file");
    }
  }
  closedir($handle); 
  arsort($fileArray);
  foreach ($fileArray as $file1 => $time) {
    echo "$file1<br>\n";
  }
}
?>

Let me know if you need any modifications to that script.

cgraz

Are you using a database? if so, you can drop the time they uploaded the file there.

Cgraz

svoec

i was thinking something along these lines

if ($_FILES['imagefile']['type'] == "image/gif") {$ft[ext]="gif";}
If ($_FILES['imagefile']['type'] == "image/pjpeg") {$ft[ext]="jpg";}
$nn = time();
$nn = $nn."."."$ft[ext]";

$nn being new name

all the files being uploaded are jpg, or gif

then I download the files, and sort through them, so sorting them wile on the server isn't a big deal, just when I download them (which my PC can handle OK)