SQL插入查询无法在数据库中插入数据[重复]

if(isset($_POST['insert_post']))
   {

         //global $con;

$con=mysqli_connect("localhost","root","","ecom") or die('Error ocurred while establishing database connection');

    // getting text data from feilds
      $product_title=$_POST['product_title'];
        $product_cat=$_POST['product_cat'];
          $product_brand=$_POST['product_brand'];
            $product_price=$_POST['product_price'];
              $product_desc=$_POST['product_desc'];
                 $product_keywords=$_POST['product_keywords'];

    // getting image from feilds
    $product_image = $_FILES['product_image']['name'];
    $product_image_tmp = $_FILES['product_image']['tmp_name'];
     echo "asd";
    move_uploaded_file($product_image_tmp, "product_images/$product_image");   


   $query = "insert into products values 
    ($product_cat','$product_brand','$product_title','$product_price','$product_desc','$product_image','$product_keywords')";


   mysqli_query($con,$query) or die ("can't work!"); 


  echo "<script>alert('Product has been inserted')</script>";
  echo "<script> window.open('insert_product.php','self')</script>";

   }

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