Prevent empty multiple inputs from insertion to data base mysql - php

Question

I have a 200 inputs ( 200 rows ) in my web page , the back end user some time enter 20 or 50 inputs and left the rest empty
how to prevent empty inputs from insertion to db
I get around that by deleting the rows with condition but is consuming time
this is my code
<?php
include("db.php");
include("header.php");
if (isset($_POST['invoice_btn'])) {
$userId = $_POST['userId'];
$invoice_to = $_POST['companyName'];
$subTotal = $_POST['subTotal'];
$taxAmount = $_POST['taxAmount'];
$taxRate = $_POST['taxRate'];
$totalAftertax = $_POST['totalAftertax'];
$amountPaid = $_POST['amountPaid'];
$amountDue = $_POST['amountDue'];
$notes = $_POST['notes'];
$productCode = $_POST['productCode'];
$productName = $_POST['productName'];
$quantity = $_POST['quantity'];
$price = $_POST['price'];
$total = $_POST['total'];
$dateTime = $_POST['dateTime'];
$submitbutton = $_POST['invoice_btn'];
if ($submitbutton) {
if (empty($productCode)) {
die(" Product code empty ");
} else {
$sqlInsert = "INSERT INTO invoice_order (invoice_to,order_date, order_total_before_tax, order_total_tax, order_tax_per, order_total_after_tax, order_amount_paid, order_total_amount_due, notes)
VALUES ('$invoice_to' ,'$dateTime', '$subTotal', '$taxAmount','$taxRate', '$totalAftertax','$amountPaid', '$amountDue','$notes')";
$result = mysqli_query($conn, $sqlInsert);
// The mysqli_insert_id() function returns the id (generated with AUTO_INCREMENT) from the last query.
$lastInsertId = mysqli_insert_id($conn);
foreach ($productCode as $index => $productCodes) {
$s_productCode = $productCodes;
$s_productName = $productName[$index];
$s_quantity = $quantity[$index];
$s_price = $price[$index];
$s_total = $total[$index];
$sqlInsertItem = "INSERT INTO invoice_order_item (order_id, item_code, item_name, order_item_quantity, order_item_price, order_item_final_amount)
VALUES ( '$lastInsertId' , '$s_productCode' , '$s_productName' , '$s_quantity', '$s_price', '$s_total')";
$result2 = mysqli_query($conn, $sqlInsertItem);
// Update Quantity on Hand from Produc table
$sqlUpdateQty = "UPDATE product SET pro_quantity = pro_quantity-$s_quantity WHERE pro_id = $s_productCode ";
$result3 = mysqli_query($conn, $sqlUpdateQty);
//delete extra rows that are empty .
$sqlDelete = "DELETE FROM `invoice_order_item` WHERE `item_code`=''";
$Delresult = mysqli_query($conn, $sqlDelete);
} // end foreach
}; // end else
} // end if

Answer 1

In your foreach loop, add a condition before the insertion:
if (empty($s_productCode)) continue;
If the condition becomes true, continue will make the parser skip the rest of the code in the loop.