Unique file name after uploading

Question

I'm trying to rename a image after uploading it. I want it to be a unique name.

I have this class (found on the internet):

I tried editing the file like this:

$upload_image = $target_path.basename($fileName);

to

$upload_image = $target_path.basename(uniqid($fileName, rand()));

but it gives me just a file, without an extension..

yeah, it is working. but it just gives me a file without the extension. how can I check what extension the image has? — tweetok, Aug 19 '16 at 15:07

score 0 · Accepted Answer · answered Aug 19 '16 at 15:07

What else should happen? uniqid will generate something like:

php > echo uniqid('kittens.jpg', rand());
kittens.jpg57b72004c1a470.87520799
php > echo basename(uniqid('kittens.jpg', rand()));
kittens.jpg57b7201cdce2e9.40812361

You don't get a extension, because you turned the file's extension into part of the "middle" of the filename.

Perhaps something like this would work better:

$info = pathinfo($file);
$file = $path . $info['filename'] . uniqid() . $info['extension'];

thanks, this is working. I just had to add a "." after uniqid(). — tweetok, Aug 19 '16 at 15:12

score 0 · Answer 2 · edited May 23 '17 at 12:00

On line 26 of the library you provided there's a variable named $file_ext that contain exactly what you need. Just concat it to the $upload_image so line 32 becomes:

$upload_image = $target_path.basename(uniqid($fileName, rand())).$file_ext;

Even if, as stated here, I would get the extension in this way: $path = $_FILES['image']['name']; $file_ext = pathinfo($path, PATHINFO_EXTENSION);

Because if the file name is, for example, test.tar.gz it will take only .gz as extension.

If you want to use this method, you could substitute line 22-24 with the above code.

Unique file name after uploading

2 Answers2