Error : Warning: fread(): supplied argument is not a valid stream resource อัพรูปลงฐานข้อมูลไม่ได้

$img_data = "";
	if($_FILES['file']['error'] == 0) {
		$file = $_FILES['file']['tmp_name'];
		$name=$_FILES['file']['name'];
		$size=$_FILES['file']['size'];
		$type=$_FILES['file']['type'];
		$f = fopen($file, "r");
		$img_data = fread($f, filesize($file));<<<<<<<<<<<<<<<<<<<<<<บรรทัดนี้
		$img_data = addslashes($img_data);
		fclose($f);<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<และบรรทัดนี้
		
		//echo $type;
	}
	if (($type== "image/jpg") || ($type== "image/pjpeg") || ($type== "image/png") || ($type== "image/gif") && ($size<700000)) {

   $str="insert into inform values('' , '$cust_id' , '$name' , '$email' , '$tel' , '$bank' , '$money' , '$date' , '$time' , '$name' )";
   copy($file,"imgs/$name");