upload image ขอคำแนะนำหน่อยค่ะ

if (isset($_POST['save'])){
	
	if(!empty($_FILES['img']['name'])){
		$filename = md5($_FILES['img']['name'].time());
		$ext = explode('.', $_FILES['img']['name']);
		$dest = __DIR__.DIRECTORY_SEPARATOR.'image'.DIRECTORY_SEPARATOR.$filename.'.'.$ext[1];
		if(!copy($_FILES['img']['tmp_name'], $dest)){
			echo 'Upload error';
			exit();
		}
		$img = $_filename.'.'.$ext[1];
	}
	
	$name = $_POST['names'];
	$mail = $_POST['mail'];
	$phone = $_POST['phone'];
	$video = $_POST['video'];
	
	$strSQL = "INSERT INTO logo (names ,mail ,phone ,img ,video)"
            ."VALUES ('$names', '$mail', $phone, '$img', '$video')";
  $objQuery = mysqli_query($objCon,$strSQL);

    echo 'Insert success';
 
}