change the name of uploaded files

[janim]

i want to upload files in folder called upload

so the name of this file stores in DB with 'file' field

ok ?

the name of the file uploaded could be similar to another one uploaded before so the sys. gonna overwrite it automatically

right ?

i want check from DB in 'file' field if the file is exist or not

if yes

change this file name to (A+original name) and so on

so if the of file was "mypicture.jpg" then with if statement it will be "Amypicture.jpg"

so in the upload folder now exist two files

mypicture.jpg & Amypicture.jpg

if another one uploaded new file named "mypicture.jpg" i want to rename it's to AAmypicture.jpg

so my if statement convert the first file just and don't continue why

this is my code

 

$checkfilename = "select id from $table where file = '".$_POST['file']."';";
$qryname=mysql_query($checkfilename) or die ("Could not match data because ".mysql_error());
$num_file= mysql_num_rows($qryname);
$target_path = "upload/";

$target_path = $target_path . basename( $_FILES['file']['name']);

$_FILES['file']['tmp_name'];

$target_path = "upload/";
$oldfile =  basename($_FILES['file']['name']);
$pos = strpos($oldfile,".",0);
$ext = trim(substr($oldfile,$pos+1,strlen($oldfile))," ");

if ($num_file == $oldfile ){

$newfile =  "A" . $oldfile ."" ;
} else {
$newfile=$oldfile;
}

$target_path = $target_path . basename($newfile);
.
.
.
.
.
.

 

what is the problem here

i posted this problem but have no answer

i think i wasn't clear enough

any comment now

 

thanks for all

 

[Daniel0]

Just give them names like this:

$name = md5(microtime()).$_FILES['file']['name'];

 

And store it like that on the disk and store the original and new name in the database.

[janim]

thank you Daniel0

it's work 100%

but why to store original name to DB

i want to use the same name from DB

and then download the file using $_GET

why i need the original file name

[Daniel0]

but why to store original name to DB

 

Because when downloading the file again (I assume that that's the purpose), then you can name the original name like this:

header("Content-Disposition: attachment; filename={$filename}");

 

So they'll e.g. download "file.txt" instead of "2203632f7d8f2c8168fc2f30217bde35file.txt".