I am creating an upload form using codeiginiter upload class to facilitate user uploading file (allowed .csv only). I want to force the users renaming their filename before they upload the csv by rejecting them if the filename is same.

$folder is my path (correctly set as I can retrieve the file and presented on another page);
$config[‘file_name’] is formed to >strtolower($_FILES[$field_name][‘name’]); resulting uploaded_user_file_name.csv as expected.

I set >$config[‘overwrite’] = TRUE; to avoid appending increment num at the end of filename.

if(file_exists($folder.'/'.$config['file_name'])) 
   {
        //$status['status'] = 0;
        $message = 'Please rename your file';
        $this->session->set_flashdata('flash_message', $message );
        redirect('pengumuman-new', 'refresh');
   }else{
    //proceed to upload

   }

HOWEVER, the code above resulting in processing the upload and overwriting the file.
Please help.

I had tried setting >$config[‘overwrite’] = FALSE; but it is not working.

I tried modifying the path (in case I mistakenly wrote the wrong path) but no solution too.