มือใหม่หัดเขียนมีปัญหา เรื่องอัพโหลดภาพลงฐานข้อมูลค่ะ ช่วยดูโค้ดให้หน่อยค่ะ

<?

$img_id = $_POST['img_id'];
$img_name = $_POST['img_name'];

if($hidAction == "Add") {
	$date = date("U");
	if($file != "  ") {
		$type = getimagesize($file);
		if($type[2] == 1) {
			$image = $date."_img.gif";
		} else if($type[2] == 2) {
			$image = $date."_img.jpg";
		}else if($type[2] == 3) {
			$image = $date."_img.png";
		}else if($type[2] == 4) {
			$image = $date."_img.jpeg";
		}
		copy($file, "images/$image");
		chmod("images/$image", 0664);
}
$host="localhost";
$user="root";
$pw="123456";
$dbname="picture";
$c = mysql_connect($host,$user,$pw);
if (!$c) {
	echo "<h3>ERROR : ??????????????????????????????</h3>";
	exit();
}
mysql_select_db($dbname);
	if(img_id != ""){
			$img_name = $_FILES["img_name"]["name"];
			$sql = "insert into  image values (' 0', '$img_name') ";
			$dbquery = mysql_db_query($dbname, $sql);
		}
}
?>