为什么basename在unlink（）中不起作用

I have a strange issue: I am trying to unlink a file from a subfolder.

So the subfolder is folder1 My unlink looks like this:

unlink("uploads/sfm/c4ca4238a0b923820dcc509a6f75849b/".'folder1/'.$_GET['delete']);

Result: he deletes the file out of the folder.

To catch the foldername, i use basename();

This shows me my current dir: basename($dir);

When i echo basename($dir); het outputs: folder1

So i put the basename in the unlink like this:

   unlink("uploads/sfm/c4ca4238a0b923820dcc509a6f75849b/".basename($dir).'/'.$_GET['delete']);

Result: i cannot delete the file anymore!

basename($dir) == folder1

What is going wrong?

Try using same operator

echo "uploads/sfm/c4ca4238a0b923820dcc509a6f75849b/".basename($dir)."/Penguins.jpg";