alert shows entry updated succesfully but entry does'nt update in database - php

Question

I am creating a updating form page. it shows no error but there is no updation in my database.
I already check whole the database row names but that doesnt help.
that code is a little bit long but please help.
<?php
if (isset($_POST['update'])) {
$update_id = $_GET['edit_form'];
$bill = $_POST['b_no'];
$naam = $_POST['name'];
$mobile_no = $_POST['mobile'];
$addres = $_POST['add'];
$detail = $_POST['p_detail'];
$p_img_name = $_FILES['p_img']['name'];
$p_img_type = $_FILES['p_img']['type'];
$p_img_size = $_FILES['p_img']['size'];
$p_img_tmp = $_FILES['p_img']['tmp_name'];
$prc = $_POST['price'];
$deposite = $_POST['d_amt'];
$remaning = $_POST['r_amt'];
$b_img_name = $_FILES['b_img']['name'];
$b_img_type = $_FILES['b_img']['type'];
$b_img_size = $_FILES['b_img']['size'];
$b_img_tmp = $_FILES['b_img']['tmp_name'];
$p_date = date('y-m-d');
move_uploaded_file($p_img_tmp, "images/Product/$p_img_name");
move_uploaded_file($b_img_tmp, "images/Bill/$b_img_name");
$update_query = "UPDATE new_entry SET bill_no='$bill', name='$naam',
mobile_no='$mobile_no', address='$addres', product_detail='detail',
product_image='$p_img_name', price='$prc', deposite_amt='deposite',
remaining='$remaning', bill_image='$b_img_name',Product_date='$p_date'
WHERE s_no='$update_id' ";
if(mysqli_query($conn, $update_query)) {
echo "<script> alert('Entry Updated Successfully') </script>";
echo "<script> window.open('view_entry.php','_self') </script>";
} else {
echo "cant Update Entry.." .mysqli_error($conn);
}
}
?>