How to count Total, Tax using data from database - php

Question

so im kinda new in codeigniter and web developing in general but is it possible to count Sub Total and Tax, automatically input that value into somekind of input box in codeigniter?
for example :
i have model that join some column and show the data into a table
table model.php
public function getPurchaseOrder()
{
$query =$this->db->query('SELECT dkmno, kodeprod,kodebarang_op,qty_op,unit_op,price,catatan FROM order_product JOIN barang_dkm ON order_product.kodebarang_op = barang_dkm.kodebarang');
return $query->result_array();
}
table view.php
<table class="table table-fixed table-bordered table-hover" style="width:100%;" id="tebal">
<thead>
<tr>
<th scope="col">DKM No </th>
<th scope="col">Kode Produksi </th>
<th scope="col">Kode Barang </th>
<th scope="col">Deskripsi </th>
<th scope="col">Jumlah/Quantity </th>
<th scope="col">Unit </th>
<th scope="col">Unit Price </th>
<th scope="col">Sub Total </th>
</tr>
</thead>
<tbody>
<?php foreach ($dataTabel as $kiki) : ?>
<tr class="table-row">
<td><?php echo $kiki["dkmno"]; ?></td>
<td><?php echo $kiki["kodeprod"]; ?></td>
<td><?php echo $kiki["kodebarang_op"]; ?></td>
<td><?php echo $kiki["catatan"]; ?></td>
<td><?php echo $kiki["qty_op"]; ?></td>
<td><?php echo $kiki["unit_op"]; ?></td>
<td><?php echo $kiki["price"]; ?></td>
<td class="calc"><?php $a=$kiki["qty_op"]*$kiki["price"]; echo $a ?></td>
</tr>
<?php endforeach;?>
</tbody>
</table>
and i want to count sub total from the table above and show the answer in a textbox or inputbox
subtotal, discount, and tax code if you want to know
<div class="row mt-5">
<div class="col-sm" id="kontol">
<div class="form-group">
<div class="row">
<div class="col-sm-3">
<label for="SubTotal" class="control-label">Sub Total : </label>
</div>
<div class="col-sm-9">
<input type="number" id="subTotal" name="SubTotal" value="" style="text-align: right;" class="form-control" disabled>
</div>
</div>
</div>
<div class="form-group">
<div class="row">
<div class="col-lg-3">
<label for="Discount" class="label-control" id="Discount">Discount : </label>
</div>
<div class="col-lg-3">
<div class="input-group">
<input type="number" name="Discount" class="form-control" id="inputDiscount" value="" min="0" max="100" onchange="calculatedSubTotal()"><span class="input-group-addon">%</span>
</div>
</div>
<div class="col-lg-6">
<input type="number" name="SubTotalDiscount" value="" style="text-align: right;" class="form-control" id="subTotalDiscount" disabled>
</div>
</div>
</div>
<div class="form-group">
<div class="row">
<div class="col-lg-3">
<label for="Tax" class="label-control">Tax : </label>
</div>
<div class="col-lg-3">
<div class="input-group">
<input type="number" name="Tax" value="" min="0" max="100" class="form-control" id="inputTax" onchange="calculatedSubTotal()"><span class="input-group-addon">%</span>
</div>
</div>
<div class="col-lg-6">
<input type="number" name="SubTotalTax" style="text-align: right;" class="form-control" id="subTotalTax" value="" disabled>
</div>
</div>
</div>
i have try to look at people who ask the same question but i still need somekind a detail how the model.php, controller.php, view.php, script.js work, if you need more details here's the link the ui that i already made : https://i.imgur.com/LSkrnMH.png

Answer 1

You could get the subtotal using CodeIgniter, but you have to use javascript to calculate the tax because it involves user interaction.
For example you have the subtotal input like this :
<div class="form-group">
<label class="col-sm-3 control-label" for="SubTotal">Sub Total</label>
<div class="col-sm-9">
<input type="number" name="SubTotal" id="subTotal" class="form-control" value="" title="Sub Total" disabled><br/>
</div>
</div>
<div class="form-group">
<label class="col-sm-3 control-label" for="Discount">Discount</label>
<div class="col-sm-9">
<div class="col-sm-6">
<div class="input-group input-group-md">
<input type="number" name="Discount" id="inputDiscount" class="form-control" value="" title="Discount" min="0" max="100" onchange="calculateSubTotal()"><span class="input-group-addon">%</span>
</div>
</div>
<div class="col-sm-6">
<input type="number" name="SubTotalDiscount" id="subTotalDiscount" class="form-control" value="" title="Subtotal After Discount" disabled><br/>
</div>
</div>
</div>
<div class="form-group">
<label class="col-sm-3 control-label" for="Tax">Tax</label>
<div class="col-sm-9">
<div class="col-sm-6">
<div class="input-group input-group-md">
<input type="number" name="Tax" id="inputTax" class="form-control" value="" title="Tax" min="0" max="100" onchange="calculateSubTotal()"><span class="input-group-addon">%</span>
</div>
</div>
<div class="col-sm-6">
<input type="number" name="SubTotalTax" id="subTotalTax" class="form-control" value="" title="Subtotal After Tax" disabled><br/>
</div>
</div>
</div>
Then you could set the subtotal value and also count the subtotals value after discount and after tax like this :
<script>
jQuery(function () {
let sum = 0.0;
jQuery('.calc').each(function() {
sum += parseInt(jQuery(this).text());
});
jQuery("#subTotal").val(sum);
});
function calculateSubTotal() {
let subtotal = jQuery("#subTotal").val();
jQuery("#subTotalDiscount").val(subtotal - (Math.round((jQuery("#inputDiscount").val() / 100) * subtotal)));
let subtotal_discount = jQuery("#subTotalDiscount").val();
jQuery("#subTotalTax").val(+subtotal_discount + (Math.round((jQuery("#inputTax").val() / 100) * subtotal_discount)));
}
</script>
That will set all of the subtotals using javascript instead.

Answer 2

Try this:
$this->db->select_sum('your_column_to_calculate');
$this->db->select('your_column_to_calculate');
$this->db->from('price');
$this->db->get();
or like this:
query = $this->db->query('SELECT sum(your_column_to_calculate) FROM price');
Hope it helps

Answer 3

This is javascript code,This calculate the only the calc row and show the result in subtotal text box and it will load automatically:
<script>
$(document).ready(function(){
var hh2 = 0;
$('#tebal > tbody > tr').each(function() {
var price = $(this).find('.calc').val();
hh2 += parseFloat(price);
});
$('#SubTotal').val(hh2);
});
</script>

Answer 4

you can count all of the sum with php itself
set variable $subtotal with zero, and add $subtotal in every loop
<?php
$subtotal = 0;
foreach ($dataTabel as $kiki) : ?>
<tr class="table-row">
....
</tr> <?php $subtotal = $subtotal+$kiki["qty_op"]*$kiki["price"]; endforeach;?>
Hope you get it.