Something

$user_image = $_FILES["imagine"]["name"];
$tmp_imagename = $_FILES["imagine"]["tmp_name"];
$extension = GetFileExtension($user_image);

if (is_uploaded_file($tmp_imagename))
{	
	do
	{
		$randomName = GenerateRandomString(15);
		$final_image = $final_image = $uploaddir.$randomName.'.'.$extension;		
		// echo $final_image;	
	}		
	while(file_exists($final_image));				
	
	
	move_uploaded_file($tmp_imagename, $final_image) 	or die ('<br>unable to move_uploaded_file');
	
	// ResizeUploadedImage($final_image);
	
	$insertedFilm = -1;
	$insertedFilm = EnterFilmInDatabase($categorie, $titlu, $descriere, $randomName.'.'.$extension);
	if ($insertedFilm  == 1)
	{	 	
		unset($_SESSION["propunere_state_categorie"]);
		unset($_SESSION["propunere_state_titlu"]);
		unset($_SESSION["propunere_state_descriere"]);
		// unset($SESSION["propunere_state_categorie"]);
				
		
		header("Location: propunerefilm.php");
	}
	else
	{
		// redirect to error file	
	}
	// exit();
	
			
}
else
{
	$_SESSION["propune_error"] = "no_file_uploaded";
	header ("Location: propunerefilm.php");	
	exit();
}