How do I rename a filename after uploading with php?

Question

How do I rename the file either before or after it gets uploaded? I just want to rename the filename, not the extension.

$changeTXT = $_SESSION['username'];
$uploaderName = strtolower($changeTXT);
$changeTXT = strtolower($changeTXT);
$changeTXT = ucfirst($changeTXT);
$filelocation = $_POST['userfile'];
$filename = $_POST['filename'];
$max_size = $_POST['MAX_FILE_SIZE'];

$file = $_FILES['userfile'];

$allowedExtensions = array("wma", "mp3", "wav");

function isAllowedExtension($fileName) {
  global $allowedExtensions;

  return in_array(end(explode(".", $fileName)), $allowedExtensions);
}

if($file['error'] == UPLOAD_ERR_OK) {
  if(isAllowedExtension($file['name'])) {

$uploaddir = "uploads/".$uploaderName."/";

$uploadfile = $uploaddir . basename($_FILES['userfile']['name']);

if (move_uploaded_file($_FILES['userfile']['tmp_name'], $uploadfile)) {

    echo "Thank you for uploading your music!<br /><br />";

} else {

    echo "Your file did not upload.<br /><br />";

}

    echo "\n";

    echo "<a href='index.php'>Return</a> to index.<br /><br />$uploaddir";

} else {

    echo "You have tried to upload an invalid file type.<br /><br />";

  }

} else die("Cannot upload");

Answer 1

When using move_uploaded_file you get to pick the filename, so you can pick anything you want.

When you upload the file, its put into a temporary directory with a temporary name, move_uploaded_file() allows you to move that file and in that you need to set the name of the file as well.

Answer 2

When you do

$uploadfile = $uploaddir . basename($_FILES['userfile']['name']);

if (move_uploaded_file($_FILES['userfile']['tmp_name'], $uploadfile)) {

Just set $uploadfile to the whole path of the desired filename; i.e. "uploads/mynewfilename.jpg"

Answer 3

Why not just save it with a different name:

Just change the name of the $uploadfile variable:

$uploadfile = $uploaddir . "somefilename" . end(explode(".", $file['name']));

It wouldn't hurt however if you refactord your code a little.

Answer 4

I'd suggest you to check out Verot's File Upload class. It heals a lot of the pain of file uploading via php, and makes your code much more readable / maintainable.

Here is the link to the class and documentation.

As to the precise answer to your question: To give a new name to an uploaded file, put it as second argument to your move_uploaded_file() function.

Since you want to keep the extension, store it first in a variable:

$ext = explode('.',$_FILES['uploaded']['name']);
$extension = $ext[1];

You could use the file root name to generate the new name (here, with a timestamp appended to it):

$newname = $ext[0].'_'.time();

Say you uploaded a file, and your form input variable name is "myfile.png" it will become 'myfile_2343544.png';

Now, combine the local path to the target directory, the $newname var and the file's extension to set the function's second argument:

$full_local_path = 'path/to/your/filefolder/'.$newname.$extension ;
move_uploaded_file($_FILES['uploaded']['tmp_name'], $full_local_path);