Develop Reference

How to properly distribute js code for php foreach?

Have php foreach in file
<?php
foreach($_SESSION['cart'] as $item):
$sqlcartprod = mysqli_query(db(),"SELECT * FROM products WHERE id='".$item['product']."' ");
$rowcartprod = mysqli_fetch_array($sqlcartprod);
?>
<tr>
<td class="shoping__cart__item">
<img src="<?=$rowcartprod['ikonka']?>" width="101" alt="">
<h5><?=$rowcartprod['name_'.$lang]?></h5>
</td>
<td class="shoping__cart__price" >
<span id="priceprod"><?=$rowcartprod['price']?></span> azn
</td>
<td class="shoping__cart__quantity">
<div class="quantity">
<div class="pro-qty">
<input type="text" style="cursor: default" readonly value="<?=$item['qty']?>">
</div>
</div>
</td>
<td class="shoping__cart__total" id="totalprice">
<?=$item['price']*$item['qty']?> azn
</td>
</tr>
<?php endforeach; ?>
for this piece of code:
<div class="quantity">
<div class="pro-qty">
<input type="text" style="cursor: default" readonly value="<?=$item['qty']?>">
</div>
</div>
have JS code:
var proQty = $('.pro-qty');
proQty.prepend('<span class="dec qtybtn">-</span>');
proQty.append('<span class="inc qtybtn">+</span>');
proQty.on('click', '.qtybtn', function () {
var $button = $(this);
var oldValue = $button.parent().find('input').val();
if ($button.hasClass('inc')) {
var newVal = parseFloat(oldValue) + 1;
} else {
// Don't allow decrementing below zero
if (oldValue > 0) {
var newVal = parseFloat(oldValue) - 1;
} else {
newVal = 0;
}
}
$button.parent().find('input').val(newVal);
var Price = document.getElementById('priceprod').innerText;
var Tprice = document.getElementById('totalprice');
if (Price[i] > 0) {
Tprice.textContent = (Price[i] * newVal) + ' azn';
}
});
The issue is that when I click on qtybtn + or qtybtn -, the js code works only for the first product in the shopping list, even if there are 2,3 or more products in the list. I tried to separate inside the js code with loops, but then the js code somehow stops working at all. How to distribute correctly so that the js code works for each product separately?

Auto calculation in table using jquery

My Requirment:
I have table with quantity cell as editable when change quantity it need to multiply with other parent td value.and sum the column values .
(i.e) if i change quantity to 2 then the parent rows need multiply by 2 & columns get value get added
I done all the calculation part the only thing when i delete or change the quantity the calculated value remain same how to revert back to old values
Here is my fiddle
Fiddle link
$(document).ready(function(){
$('.quantity').on('change, keyup',function(){
var val=$(this).text();
// To avoid auto inc while pressing arrow keys
var preVal =$(this).data('prevval');
<!-- console.log(preVal); -->
if(preVal && preVal == val){
return;
}
$(this).data('prevval',val);
//To avoid auto inc while pressing arrow keys //
if(val =='' || isNaN(val) || val < 1){
return;
}
$(this).siblings().each(function(){
var tbvalue=$(this).text();
var result= parseInt(tbvalue)*parseInt(val);
$(this).text(result);
})
autoSum();
});
autoSum();
});
function autoSum(){
for (var i = 1; i < 8; i++) {
var sum = 0;
$('.auto_sum>tbody>tr>td:nth-child(' + i + ')').each(function() {
sum += parseInt($(this).text()) || 0;
});
// set total in last cell of the column
$('.auto_sum>tbody>tr>td:nth-child(' + i + ')').last().html(sum);
// $('.auto_sum>tbody>tr>td:nth-child(' + i + ')').last().toggleClass('total');
}
}
.total {
background-color: #000;
color: #fff;
font-weight: bold;
}
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<div class="container">
<h2>Table calculation</h2>
<p>Calculaton</p>
<table class="auto_sum table table-hover">
<thead>
<tr>
<th>value1</th>
<th>value2</th>
<th>value3</th>
<th>Quantity</th>
</tr>
</thead>
<tbody>
<tr>
<td>10</td>
<td>5</td>
<td>4</td>
<td class="quantity" type="number" contenteditable>1</td>
</tr>
<tr>
<td>8</td>
<td type>2</td>
<td>3</td>
<td class="quantity" type="number" contenteditable>1</td>
</tr>
<tr>
<td>20</td>
<td>3</td>
<td>5</td>
<td class="quantity" type="number" contenteditable>1</td>
</tr>
<tr class="total">
<td> </td>
<td> </td>
<td> </td>
<td> </td>
</tr>
</tbody>
</table>
</div>

Inside every row, with the td that store the numbers to be multiplied, keep the original numbers in a data-val attribute in the td, and multiply your content editable value with that. Display the multiplied value as the td text. One change here is that, when you delete the value of contenteditable cell, it takes it as 1 for row calculation, but does not consider it for column multiplication.
HTML part
<div class="container">
<h2>Table calculation</h2>
<p>Calculaton</p>
<table class="auto_sum table table-hover">
<thead>
<tr>
<th>value1</th>
<th>value2</th>
<th>value3</th>
<th>Quantity</th>
</tr>
</thead>
<tbody>
<tr>
<td data-val="10">10</td>
<td data-val="5">5</td>
<td data-val="4">4</td>
<td class="quantity" type="number" contenteditable>1</td>
</tr>
<tr>
<td data-val="8">8</td>
<td data-val="2">2</td>
<td data-val="3">3</td>
<td class="quantity" type="number" contenteditable>1</td>
</tr>
<tr>
<td data-val="20">20</td>
<td data-val="3">3</td>
<td data-val="5">5</td>
<td class="quantity" type="number" contenteditable>1</td>
</tr>
<tr class="total">
<td> </td>
<td> </td>
<td> </td>
<td> </td>
</tr>
</tbody>
</table>
</div>
JS Part
$(document).ready(function(){
$('.quantity').on('change, keyup',function(){
var val=$(this).text();
// To avoid auto inc while pressing arrow keys
var preVal =$(this).data('prevval');
$(this).data('prevval',val);
//To avoid auto inc while pressing arrow keys //
if(val =='' || isNaN(val) || val < 1 || val == undefined){
val = 1;
}
$(this).siblings().each(function(){
var tbvalue=$(this).data("val");
var result= parseInt(tbvalue)*parseInt(val);
$(this).text(result);
});
autoSum();
});
autoSum();
});
function autoSum(){
for (var i = 1; i <= 4; i++) {
var sum = 0;
var tdBoxes = $('.auto_sum>tbody>tr>td:nth-child(' + i + ')');
for(var j=0; j<tdBoxes.length-1;j++)
{
var value = $(tdBoxes[j]).text();
//alert(value);
sum += (value == undefined || value == "")? 0 : parseInt(value);
}
// set total in last cell of the column
$('.auto_sum>tbody>tr>td:nth-child(' + i + ')').last().html(sum);
// $('.auto_sum>tbody>tr>td:nth-child(' + i + ')').last().toggleClass('total');
}
}

All details are commented in working demo. I added <form>, <output>, <input type='number'> and <input type='hidden'>. Also I don't remember <td> having a type attribute or a value of number either.
With the combination of the right elements and attributes (and maybe even a little CSS), you don't have to write so much JS/jQ because there many aspects of form functions built within HTML.
Demo
// Reference the <form>
var main = document.forms.main;
// Reference of all of <input> and <output> of <form>
var field = main.elements;
/* Register the input event on the <form>
|| ANY input event triggered within <form> will...
*/
main.addEventListener('input', function(e) {
// Check to see which field is the user inputing into
if (e.target !== e.currentTarget) {
// Reference that field
var input = document.getElementById(e.target.id);
// console.log(input.value);
// Get the row of the field
var row = input.parentNode.parentNode;
// console.log(row);
/* Gather all hidden fields of that row into a NodeList
|| and convert that NodeList into an array.
*/
var rowArray = Array.from(row.querySelectorAll('[type=hidden]'));
// console.log(rowArray);
// On each hidden field, perform the following function...
rowArray.forEach(function(cel, idx) {
// Get the value of hidden field
const base = cel.value;
// Find the <output> that comes after the hidden field
var output = cel.nextElementSibling;
/* Calculate the product of the hidden field's value
|| and the input field's value
*/
var val = parseInt(base, 10) * parseInt(input.value, 10);
// Display the prouct in the <output>
output.value = val;
});
/* Because we registered the input event on the <form>,
|| we have many ways to manipulate the <form>'s fields.
|| In this demo we have been using:
|| HTMLFormElement and HTMLFormControlsCollection interfaces
|| https://developer.mozilla.org/en-US/docs/Web/API/HTMLFormElement
|| http://www.dyn-web.com/tutorials/forms/references.php#dom0
*/
field.out1.value = Number(field.o1a.value) + Number(field.o1b.value) + Number(field.o1c.value);
field.out2.value = Number(field.o2a.value) + Number(field.o2b.value) + Number(field.o2c.value);
field.out3.value = Number(field.o3a.value) + Number(field.o3b.value) + Number(field.o3c.value);
field.out4.value = Number(field.out1.value) + Number(field.out2.value) + Number(field.out3.value);
}
});
.total {
background-color: #000;
color: #fff;
font-weight: bold;
}
input,
output {
display: inline-block;
font: inherit;
width: 6ch;
border: 0;
text-align: center;
}
.quantity input {
padding-top: .5em;
outline: 0;
}
-
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width,initial-scale=1, user-scalable=no">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<style>
</style>
</head>
<body>
<div class="container">
<form id='main'>
<table class="auto_sum table table-hover">
<thead>
<caption>
<h2>Table Calculation</h2>
<h3>Quanities</h3>
</caption>
<tr>
<th>Value1</th>
<th>Value2</th>
<th>Value3</th>
<th>Quantity</th>
</tr>
</thead>
<tbody>
<tr id='rowA'>
<td>
<!--[0][1]-->
<input id='v1a' type='hidden' value='10'>
<output id='o1a'>0</output>
</td>
<td>
<!--[2][3]-->
<input id='v2a' type='hidden' value='5'>
<output id='o2a'>0</output>
</td>
<td>
<!--[4][5]-->
<input id='v3a' type='hidden' value='4'>
<output id='o3a'>0</output>
</td>
<td class="quantity">
<!--[6]-->
<input id='qa' type='number' value='0' max='999' min='0'>
</td>
</tr>
<tr id='rowB'>
<td>
<!--[7][8]-->
<input id='v1b' type='hidden' value='8'>
<output id='o1b'>0</output>
</td>
<td>
<!--[9][10]-->
<input id='v2b' type='hidden' value='2'>
<output id='o2b'>0</output>
</td>
<td>
<!--[11][12]-->
<input id='v3b' type='hidden' value='3'>
<output id='o3b'>0</output>
</td>
<td class="quantity">
<!--[13]-->
<input id='qb' type='number' value='0' max='999' min='0'>
</td>
</tr>
<tr id='rowC'>
<td>
<!--[14][15]-->
<input id='v1c' type='hidden' value='20'>
<output id='o1c'>0</output>
</td>
<td>
<!--[16][17]-->
<input id='v2c' type='hidden' value='3'>
<output id='o2c'>0</output>
</td>
<td>
<!--[18][19]-->
<input id='v3c' type='hidden' value='5'>
<output id='o3c'>0</output>
</td>
<td class="quantity">
<!--[20]-->
<input id='qc' type='number' value='0' max='999' min='0'>
</td>
</tr>
<tr class="total">
<td>
<!--[21]-->
<output id='out1' for='o1a o1b o1c'>0</output>
</td>
<td>
<!--[22]-->
<output id='out2' for='o2a o2b o2c'>0</output>
</td>
<td>
<!--[23]-->
<output id='out3' for='o3a o3b o3c'>0</output>
</td>
<td>
<!--[24]-->
<output id='out4' for='out1 out2 out3'>0</output>
</td>
</tr>
</tbody>
</table>
</form>
</div>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
</body>
</html>

add text field dynamically in to a html table

$(document).ready(function() {
var maxField = 10;
var addButton = $('.add_button');
var wrapper = $('.field_wrapper');
var fieldHTML = '<div><input type="text" name="Tape_Code[]" value=""/>delete</div>';
var x = 1;
$(addButton).click(function() {
if (x < maxField) {
x++;
$(wrapper).append(fieldHTML);
}
});
$(wrapper).on('click', '.remove_button', function(e) {
e.preventDefault();
$(this).parent('div').remove();
x--;
});
});
<?php
include_once 'dpconnect.php';
$que=mysqli_query($MySQLiconn,"select Backup_Name from admin_backup_list ");
if(isset($_POST['confirm'])) {
$Date=date('d/m/y');
$Backup_Name=$_POST['Backup_Name'];
$Tape_Code = $_POST['Tape_Code'];
$Operator_Approval = $_POST['Operator_Approval'];
$Operator_Remark = $_POST['Operator_Remark'];
$abc=mysqli_query($MySQLiconn,"insert into backup_details(Date, Backup_Name, Tape_Code,Operator_Approval,Operator_Remark)values('$Backup_Name','$Tape_Code','$Operator_Approval','$Operator_Remark')");
}
?>
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.11.2/jquery.min.js"></script>
<?php $Date=date( 'd/m/y'); ?>
<form name="form2" action="" method="post">
<table>
<tr>
<td width="103">Date</td>
<td width="94">Backup_Name</td>
<td width="94">No Of Tapes</td>
<td width="53">Tape Code</td>
<td width="71">Operator Approval</td>
<td width="144">Operator Remark</td>
</tr>
<?php if ($que->num_rows > 0) { while ($row = mysqli_fetch_array($que)) { ?>
<tr>
<td>
<?php echo $Date; ?>
</td>
<td>
<?php echo $row[ 'Backup_Name']; ?>
</td>
<td>
<input type="text" name="No_Of_Backup">
</td>
<td>
<div class="field_wrapper">
<input type="text" name="Tape_Code" value="" />add
</div>
</td>
<td>
<input type="text" name="Operator_Approval">
</td>
<td>
<input type="text" name="Operator_Remark">
</td>
<td colspan="8">
<input type="submit" name="confirm" value="Confirm">
</center>
</td>
</tr>
<?php } } ?>
</table>
</form>
</body>
</html>
I'm doing this code in php. I need a help to add text fields dynamically in to the table's particular column. I have done the code using JavaScript also. But the problem is when I add field in one row, all rows are updating with extra fields. I need a help. How can I insert those data to MySQL?

The problem with your code is that you are using the class selector to select the elements. Class selector returns array like object of all the elements having that class.
https://developer.mozilla.org/en-US/docs/Web/API/Document/getElementsByClassName
you can find out which element was clicked if you change your code similar to below one.
add
and in the script
function addButton(ev) {
var clickedElement = console.log(ev.target);
}
Now you have the element which was clicked by user and you can find the parent td/tr and append html for textbox.

In $Tape_Code = $_POST['Tape_Code']; You will get array of text input you have to insert it in database in form that you want.
$Tape_Code = $_POST['Tape_Code']
foreach($Tape_Code as $code){
echo $code;
}

How to read an array of integers from an element to get values from it?

I make a code , that randomly display an 6-item array in a div.
i want to read the array and pass it to function to calculate the mean of it?
HTML
what i must do , how can i store the data of div(id="numbers" )
and push it in array ?
<pre>
<div >
<form action="" method="post" name="meanForm" onsubmit='return false' id="formmine">
<table width="100%" border="0"
<tr>
<td colspan="3" style="background-color:#06F ;color:#FFF">Answer this problem</td>
</tr>
<tr>
<td style="color:green; font-size:20px">What is the mean of these numbers </td>
<td colspan="2" ><div id="numbers"></div>
</td>
</tr>
<tr>
<td colspan="3"> </td>
</tr>
<tr id="answerANDpic">
<td height="62" colspan="3" align="center" > <input name="" type="text" size="15" maxlength="100" height="50" style=" border: solid #0C0 ; border-width:thin" id="answer" onkeydown="searchm(this)"/> </td>
</tr>
<tr>
<td colspan="3" ><div id ="explain" ></div></td>
</tr>
<tr>
<td> </td>
<td><input name="" type="button" id="newEx" style="background-color:green ; color:white" align ="left" value="New Problem" class="send_feed" onclick="randomArray(6,0,99)" /></td>
<td><input name="" type="button" id="solution" style="background-color:#606 ; color:#FFF " align="left" class="send_feed" value="Solution" onclick="solution()"/></td>
</tr>
</table>
</form>
</div>
in JS
var myNumArray = randomArray(6,0,99);
function random_number(min,max) {
return (Math.round((max-min) * Math.random() + min));
}
function randomArray(num_elements,min,max) {
var nums = new Array;
for (var element=0; element<num_elements; element++) {
nums[element] = random_number(min,max);
}
document.getElementById("numbers").innerHTML=nums;
calcMean(nums);
}
function calcMean(nums) {
var num=0;
for (var i=0;i<nums.length;i++) {
num += parseFloat( nums[i], 6 );
}
var divide=num/nums.length;
var mean=(parseInt(divide,10));
var maxi = Math.max.apply(Math,nums);
var mini = Math.min.apply(Math,nums);
return mean,maxi,mini;
}
function searchm(ele) {
if(event.keyCode == 13) {
// alert(ele.value); // i get the value and put it on alert
var inans= ele.value;
return inans;
}
}
function soltuion(){
//read array saved in div id="numbers"
// call calcMean()
//get the mean and max min values
}

See comments in code below. Your code is not far off working.
function calcMean(nums){
var num=0;
for (var i=0;i<nums.length;i++){
// parseFloat only has one argument
// See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/parseFloat
num += parseFloat( nums[i])
// If the numbers in the nums array
// are already floats, you don't need parseFloat
// So maybe you can do... ?
// num += nums[i]
}
// The line below might divide by zero, so check
if (nums.length == 0) {
return 0;
}
var divide=num/nums.length;
// No need to reparse a number.
mean=divide
// This code suggests that nums is already filled with numbers
// See comment in for-loop above
var maxi = Math.max.apply(Math,nums);
var mini = Math.min.apply(Math,nums);
// This returns all 3 numbers
return [mean,mini,maxi];
// If you want just the mean,
// return mean;
}

Disabling a textbox if it has value and ignored this disabled value in addition and subtraction in javascript

I want to add id= lr1, lr2 & lr3 total will show in id=tlrr and subtract from id=totalAmt.
HTML CODE.
<tr>
<td width="125"><b>Receiving Quarantine </b></td>
<td>
<input type="textbox" name="rcv_quantity" class="tqty" id="totalAmt" value="<?php echo $row->rcv_quantity; ?>" /> </td>
</tr>
<tr>
<td width="125"><b>Lot Released-1 </b></td>
<td>
<input type="textbox" name="lot_rel1" id="lr1" class="lr" value="<?php echo $row->lot_rel1; ?>" /> </td>
</tr>
<tr>
<td width="125"><b>Lot Released-2 </b></td>
<td>
<input type="textbox" name="lot_rel2" id="lr2" class="lr" value="<?php echo $row->lot_rel2; ?>" /> </td>
</tr>
<tr>
<td width="125"><b>Lot Released-3 </b></td>
<td>
<input type="textbox" name="lot_rel3" id="lr3" class="lr" value="<?php echo $row->lot_rel3; ?>" /> </td>
</tr>
<tr>
<td width="125"><b>Total Lot Released </b></td>
<td>
<input type="textbox" name="total_lot_rel" id="tlrr" class="tlr" value="<?php echo $row->total_lot_rel; ?>" /> </td>
</tr>
Javascript for addition and subtraction:It works nice.
<script>
$(document).ready(function () {
$('.lr').val(0); // reset
$('.lr,#re').keyup(function () {
$('.tqty, #totalAmt').val(<?php echo $row->rcv_quantity; ?>);
$('.tlr,#tlrr').val(<?php echo $row->total_lot_rel; ?>);
// Loop through all inputs and re-calculate the total
var total = parseFloat(totalAmt.value);
var total_lr = parseFloat(tlrr.value);
$('.lr,#re').each(function () {
// the "+" before the variable makes sure it's a number instead of a string
// the "or 0" makes it 0 if it's empty, instead of "undefined"
var number = +$(this).val() || 0;
// console.log(number);
total -= +number; // adds up the numbers
decimal = parseFloat(total).toFixed(2);
// sets the total to 2 decimal places
});
//----------------------------
$('.lr').each(function () {
var number = +$(this).val() || 0;
total_lr += +number;
decimal1 = parseFloat(total_lr).toFixed(2); // sets the total to 2 decimal places
});
//--------------------------------
// Update the total
$('#totalAmt').val(decimal);
$('#tlrr').val(decimal1);
//$('#notRbl1').val(decimal);
});
});
</script>
But not disable those textbox which has value and these textbox also participate addition and subtraction.Javascript textbox disable
window.onload = function() {
if (document.getElementById("lr1").value != null) {
ddocument.getElementById('lr1')
.setAttribute('disabled', 'disabled');
}
else if (document.getElementById("lr2").value != null) {
ddocument.getElementById('lr2')
.setAttribute('disabled', 'disabled');
}
else if (document.getElementById("lr3").value != null) {
ddocument.getElementById('lr3')
.setAttribute('disabled', 'disabled');
}
}
I want this when lr1 is input it will subtract from totalAmt and and lr1 value show in tlrr. Then when I want to input lr2 then lr1 is disable and only lr2 subtract from totalAmt and it will add tlrr.