Expanding a file upload code

murphybr

I am working on a file upload script for my server. just trying to further learn php.
Currently it will upload a file i designate to upload to my file server, however if the folder is not already there (in this case the folder is designated as the username i log in with) I currently must create it for the script to load the file to that folder.

I am coming up against a brick wall in the 2 things i want to expand on.

1st my code will be below this explanation.

I would like for the script to check to see if the folder already exists, if it does not then i would like it to create the said folder based off of $username.
if a file with the same name is already located on the file server, i would like for the script to prompt in order to overwrite the pre-existing file.

Any help would be greatly appreciated.

if((!empty($FILES["uploaded"])) && ($FILES['uploaded']['error'] == 0)) {
$filename = basename($FILES['uploaded']['name']);
//Determine the path to which we want to save this file
$upload_file = $upload_path.$filename;
//Check if the file with the same name is already exists on the server
if (!file_exists($upload_file)) {
//Attempt to move the uploaded file to it's new place
if ((move_uploaded_file($FILES['uploaded']['tmp_name'],$upload_file))) {
echo "It's done! The file has been saved as: ".$upload_file;
} else {
echo "Error: A problem occurred during file upload!";
}
} else {
echo "Error: File ".$_FILES["uploaded"]["name"]." already exists";
}
} else {
echo "Error: No file uploaded";
}

bradgrafelman

Welcome to PHPBuilder! When posting PHP code, please use the board's [noparse]

..

[/noparse] bbcode tags as they make your code much easier to read and analyze. Speaking of being easy to read, you should indent your code as well.

murphybr wrote:
1. I would like for the script to check to see if the folder already exists, if it does not then i would like it to create the said folder based off of $username.

[man]is_dir/man and [man]mkdir/man should be all you need for that.

murphybr wrote:
2. if a file with the same name is already located on the file server, i would like for the script to prompt in order to overwrite the pre-existing file.

You can use [man]file_exists/man to check for an existing file, but in order to "prompt" the user you're going to have to move the uploaded file to a temporary location since PHP deletes all uploaded files that haven't been moved by the end of the script's execution.

murphybr

sorry, i didnt see the php tags.

I got the is_dir and mk_dir put in....thank you for that.

in line 4 I use a if (!file_exist) to start off the file upload.

So I assume I need to do something with line 11 where it echos the Error file already exists to make it run some sort of user prompt(i assume maybe a javascript???) to ask for a user prompt of overwrite or quit. but then how do i get it to continue to overwrite the file(do I use the move_uploaded_file command again?)

if((!empty($_FILES["uploaded"])) && ($_FILES['uploaded']['error'] == 0)) {
    $filename = basename($_FILES['uploaded']['name']);
    $upload_file = $upload_path.$filename;
    if (!file_exists($upload_file)) {
         if ((move_uploaded_file($_FILES['uploaded']['tmp_name'],$upload_file))) {
              echo "It's done! The file has been saved as: ".$upload_file;
         } else {
              echo "Error: A problem occurred during file upload!";
         }
   } else {
         echo "Error: File ".$_FILES["uploaded"]["name"]." already exists";
   }
} else {
   echo "Error: No file uploaded";
}

bradgrafelman

murphybr wrote:
but then how do i get it to continue to overwrite the file

Like I said, you're going to have to do something like:

Move the uploaded file to a (different) temporary location.
Display a page that notifies the user of the duplicate filename and asks them how to proceed (overwrite, rename old, supply new file name, whatever). Include in this page some way to identify the file's new temp location (e.g. store the filename/path in a session).
Process the above request (separate page load - hence why you'll need some way to identify the file that was uploaded previously).