Change file name Laravel 4 - php

Question

How can I change name of uploaded file in Laravel 4.
So far I have been doing it like this:
$file = Input::file('file');
$destinationPath = 'public/downloads/';
if (!file_exists($destinationPath)) {
mkdir("./".$destinationPath, 0777, true);
}
$filename = $file->getClientOriginalName();
But if I have 2 files with the same name I guess it gets rewritten, so I would like to have something like (2) added at the end of the second file name or to change the file name completely

Answer 1

The first step is to check if the file exists. If it doesn't, extract the filename and extension with pathinfo() and then rename it with the following code:
$img_name = strtolower(pathinfo($image_name, PATHINFO_FILENAME));
$img_ext = strtolower(pathinfo($image_name, PATHINFO_EXTENSION));
$filecounter = 1;
while (file_exists($destinationPath)) {
$img_duplicate = $img_name . '_' . ++$filecounter . '.'. $img_ext;
$destinationPath = $destinationPath . $img_duplicate;
}
The loop will continue renaming files as file_1, file_2 etc. as long as the condition file_exists($destinationPath) returns true.

Answer 2

I know this question is closed, but this is a way to check if a filename is already taken, so the original file is not overwriten:
(... in the controller: ... )
$path = public_path().'\\uploads\\';
$extension = pathinfo($fileName, PATHINFO_EXTENSION);
$original_filename = pathinfo($fileName, PATHINFO_FILENAME);
$new_filename = $this->getNewFileName($original_filename, $extension, $path);
$upload_success = Input::file('file')->move($path, $new_filename);
this function get an "unused" filename:
public function getNewFileName($filename, $extension, $path){
$i = 1;
$new_filename = $filename.'.'.$extension;
while( File::exists($path.$new_filename) )
$new_filename = $filename.' ('.$i++.').'.$extension;
return $new_filename;
}