Develop Reference

how to insert both value and content of dropdown select into database?

i want to insert both value and content of dropdown select into a database table. i can insert the value with no problem but i have no idea how to insert the content. i've been searching similar questions and probably it can be done by adding javascript. but i haven't learned about that yet so i have no clue how to use it.
<form action="hitung.php" method="POST" id="formid">
<?php
$query = "SELECT nama FROM alternatif";
$result = mysqli_query($conn, $query);
for ($i=0; $i < $row = mysqli_fetch_array($result) ; $i++) {
?>
<tr>
<th><?php echo $row['nama'] ?></th>
<?php
$select = mysqli_query($conn, "SELECT * FROM kriteria");
$count = mysqli_num_rows($select);
for ($j=0; $j < $count ; $j++) {
?>
<td>
<select class="btn-secondary" name="subkrt[<?php echo $i ?>][<?php echo $j ?>]" required>
<option value="" style="display:none;" required>-Pilih-</option>
<?php
$query = mysqli_query($conn, "SELECT pv_alternatif.pv_subkriteria, subkriteria.nama FROM pv_alternatif INNER JOIN subkriteria ON pv_alternatif.id_alternatif = subkriteria.id WHERE id_kriteria=$j+1");
while ($a = mysqli_fetch_array($query)) {
?>
<option value="<?php echo $a['pv_subkriteria']; ?>"><?php echo $a['nama']; ?></option>
<?php
}
?>
</select>
</td>
<?php
}
}
?>
</tr>
</form>
so both value and content are fetched from two different tables of my database. and hitung.php is code to insert into database.
include 'koneksi.php';
include 'fungsi.php';
$jmlsub = array();
$qwery = mysqli_query($conn, "SELECT nilai FROM pv_kriteria");
while ($row = mysqli_fetch_array($qwery)){
$rows[] = $row['nilai'];
$jmlsub[] = 0;
}
$query = "SELECT nama FROM alternatif";
$result = mysqli_query($conn, $query);
$a = mysqli_query($conn, "SELECT * FROM nilai_alt");
for ($i=0; $i < $row = mysqli_fetch_array($result) ; $i++) {?>
<?php
$select = mysqli_query($conn, "SELECT * FROM kriteria");
$count = mysqli_num_rows($select);
for ($j=0; $j < $count ; $j++) {
if(isset($_POST['subkrt'][$i][$j])){
$matriks[$i][$j] = $_POST['subkrt'][$i][$j] * $rows[$j];
$value = $matriks[$i][$j];
$jmlsub[$i] += $value;
$id_alternatif = getIDAlternatif($i);
$id_kriteria = getKriteriaID($j);
if (mysqli_num_rows($a)==0) {
$b = "INSERT INTO nilai_alt VALUES('',$id_alternatif,$id_kriteria,$value)";
} else {
$b = "UPDATE nilai_alt SET nilai_alternatif=$value WHERE id_alternatif = $id_alternatif AND id_kriteria = $id_kriteria";
}
$rsult = mysqli_query($conn,$b);
if (!$rsult) {
echo "Gagal memasukkan / mengupdate nilai alternatif";
exit();
}
}
}
}
$jmlAlternatif = getJumlahSubKriteria();
for ($i=0; $i < ($jmlAlternatif); $i++) {
$id_alternatif = getIDAlternatif($i);
$query = "INSERT INTO ranking VALUES ($id_alternatif,$jmlsub[$i]) ON DUPLICATE KEY UPDATE nilai=$jmlsub[$i]";
$result = mysqli_query($conn,$query);
if (!$result) {
echo "Gagal mengupdate ranking";
exit();
}
}
header('Location: hasil_subkrt.php');
?>
tables:
Any help will be greatly appreciated. Thanks.

As you said you "can insert the value with no problem", so it is simple to pass all the value and content to the selected option value as a string
using json_encode(...), then in hitung.php you just convert it back to array or object using json_decode(...)
If you have a array, example:
$a = array('pv_subkriteria' => 'the value', 'nama' => 'the name');
Then just
<option value='<?php echo htmlentities(json_encode($a)); ?>'><?php echo $a['nama']; ?></option>
Then in your case in hitung.php,
...
$a = json_decode(html_entity_decode($_POST['subkrt'][$i][$j]), true);
...
More info, generally your code has nested loop and query database in loop, you need to think more about better query way to reduce number of loops to increase performance.
Edited and added an example using some php functions that might help you:
<?php
$a = array('pv_subkriteria' => 'the value', 'nama' => 'the name');
$str = htmlentities(json_encode($a));
$a2 = json_decode(html_entity_decode($str), true);
print_r($a2);
?>

Connection of two tables

I have a problem with making a query to MYSQL which will combine two tables.
Mainly I want to through such a query
<?php
require_once 'dbconnect.php';
$wynik = mysql_query("SELECT * FROM users")
or die('Błąd zapytania');
/*
wyświetlamy wyniki, sprawdzamy,
czy zapytanie zwróciło wartość większą od 0
*/
if(mysql_num_rows($wynik) > 0) {
/* jeżeli wynik jest pozytywny, to wyświetlamy dane */
echo "<table cellpadding=\"2\" border=1>";
while($r = mysql_fetch_assoc($wynik)) {
echo "<tr>";
echo "<td><a href='pokaz.php?id=".$r['userId']."'>".$r['userName']."</a></td>";
echo "</tr>";
}
echo "</table>";
}
?>
and after clicking on the link, the pictures that this user added showed me
the file pokaz.php looks like this
my tables
Please, let someone ask me this question, I will be grateful

use mysqli:
<?php
$con = mysqli_connect("localhost","my_user","my_password","my_db");
$wynik = mysqli_query($con, "select `user`.userId, `user`.userName, `pictures`.image_name from `user` inner join `user_uploads` on `user_uploads`.user_id_fk = `user`.id");
/*
wyświetlamy wyniki, sprawdzamy,
czy zapytanie zwróciło wartość większą od 0
*/
if($wynik) {
if (mysqli_num_rows($wynik) > 0) {
;
/* jeżeli wynik jest pozytywny, to wyświetlamy dane */
echo "<table cellpadding=\"2\" border=1>";
while ($r = mysqli_fetch_assoc($wynik)) {
$imgName = $r['image_name'];
echo "<tr>";
echo "<td><a href='pokaz.php?id=" . $r['userId'] . "'>" . $r['userName'] . "</a></td>";
echo "<img src='/uploads/$imgName' />";
echo "</tr>";
}
echo "</table>";
}
}
?>
UPDATE:
if you want to show images in pokaz.php for each user:
<?php
$con = mysqli_connect("localhost","my_user","my_password","my_db");
$wynik = mysqli_query($con, "select `user`.userId, `user`.userName, `pictures`.image_name from `user` inner join `user_uploads` on `user_uploads`.user_id_fk = `user`.id");
/*
wyświetlamy wyniki, sprawdzamy,
czy zapytanie zwróciło wartość większą od 0
*/
if($wynik) {
if (mysqli_num_rows($wynik) > 0) {
;
/* jeżeli wynik jest pozytywny, to wyświetlamy dane */
echo "<table cellpadding=\"2\" border=1>";
while ($r = mysqli_fetch_assoc($wynik)) {
$imgName = $r['image_name'];
echo "<tr>";
echo "<td><a href='pokaz.php?id=" . $r['userId'] . "'>" . $r['userName'] . "</a></td>";
echo "<img src='/uploads/$imgName' />";
echo "</tr>";
}
echo "</table>";
}
}
?>
pokaz.php
<?php
if(isset($_GET['userId'])){
$userId = $_GET['userId'];
$con = mysqli_connect("localhost","my_user","my_password","my_db");
$query = "select image_name from user_uploads";
$result = mysqli_query($con, $query);
if($result){
while($row = mysqli_fetch_assoc($result)){
$imgName = $row['image_name'];
echo "<img src='/uploads/$imgName' /></br>";
}
}
}

how can i highlight a row when date is older than yesterday

I am very new to jQuery and JavaScript. I have a small question. Let's say i have a HTML table like the following
<?php
include 'dbconnect.php';
$sql = "SELECT * FROM Comments";
$result = mysqli_query($conn,$sql);
if (!$result) {
echo '<div>no comments were set up</div>';
}
$fields_num = mysqli_num_fields($result);
echo "<h1>Table: {$table}</h1>";
echo "<table id='myTable' border='1'><tr>";
// printing table headers
for($i=0; $i<$fields_num; $i++)
{
$field = mysqli_fetch_field($result);
echo "<td>{$field->name}</td>";
}
echo "</tr>\n";
// printing table rows
while($row = mysqli_fetch_row($result))
{
echo "<tr>";
// $row is array... foreach( .. ) puts every element
// of $row to $cell variable
foreach($row as $cell)
echo "<td>$cell</td>";
//delete button
echo "<td><input type='button' value='Delete' onclick='deleteRow(this)'></td>";
//checkbox button
echo "<td><input type='checkbox' value='Highlight' onclick='highlight(this)'></td>";
echo "</tr>\n";
}
mysqli_free_result($result);
?>
I want to check if the date in the 8th column is older than a day the row should be highlighted. How can I proceed.
i found a code but this is not working:
function checkdate(){
$('#myTable tr td').each(function () {
var dtTd = new Date($(this).html());
var dtNew = new Date();
// 15 minutes is 900000 milliseconds
// getTime() doc - https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date/getTime
if (dtTd.getTime() - dtNew.getTime() < 900000 && dtNew < dtTd) {
$(this).css("background-color", "red");
} else {
if (dtNew > dtTd) {
$(this).css("background-color", "yellow");
}
}
});
}

Try this:
$date = date('Y-m-d');
foreach($row as $cell)
{
if($cell['date'] < $date)
{
// for date less then today's date
}
else
{
// for others date
}
}

Retrieve next row data every 5 mins

I have rows of data in my database table,
How to display
First; row ID 1,
after 5 mins row ID 2,
after 5 mins row ID 3
and so on, Automatically.
The webpage will auto retrieve next row every 5 mins and only display that row.
kinda like refreshing every 5 mins but displaying next row not the latest one.
below is my code :
<html>
<head>
<style>
#main {
margin:5% 15% 10% 15%;
background:url(viewBG.png);
width:70%;
height:80%;
}
p {
padding:20% 20% 20% 20%;
color:white;
font-family: Honey Script;
font-size:30pt;
}
body {
background-color: skyblue;
}
</style>
</head>
<body>
<?php
//connection to
require 'config.php';
$conn = mysqli_connect( $db_host, $db_username, $db_password, $db_name);
// Create connection
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
}
//$sql = "SELECT * FROM `demo` ORDER BY `ID` DESC ";
$sql = "SELECT Comment FROM demo ORDER BY ID DESC LIMIT 1";
$result = $conn->query($sql);
if ($result->num_rows > 0) {
// output data of each row
while($row = $result->fetch_assoc()) {
echo '<div id="main">';
echo ' <p>"'.$row["Comment"].'"</p>';
echo "</div>";
}
} else {
echo "0 results";
}
$conn->close();
?>
</body>
</html>

You will have to combine javascript in your solution. Make your php script to echo a form with a parameter with the next row to retrieve, lets say in php this :
<?php
if (isset($_REQUEST["next_row"])) {
$myrow = $_REQUEST["next_row"];
} else {
$myrow = 0;
}
echo '<form id=myform> <input type=hidden name="next_row" value="'.($myrow * 1 + 1).'"> </form>';
//connection to
require 'config.php';
$conn = mysqli_connect( $db_host, $db_username, $db_password, $db_name);
// Create connection
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
}
//$sql = "SELECT * FROM `demo` ORDER BY `ID` DESC ";
$sql = "SELECT Comment FROM demo ORDER BY ID DESC LIMIT 1 OFFSET ". $myrow;
$result = $conn->query($sql);
if ($result->num_rows > 0) {
// output data of each row
while($row = $result->fetch_assoc()) {
echo '<div id="main">';
echo ' <p>"'.$row["Comment"].'"</p>';
echo "</div>";
}
} else {
echo "0 results";
}
$conn->close();
?>
Ok now on Javascript at the end of the page the following code (be sure to include jquery.js):
setTimeout(function(){ $('#myform').submit(); }, 300000);

Why php code inside the javascript cannot change the value of innerHTML? [duplicate]

This question already has answers here:
What is the difference between client-side and server-side programming?
(3 answers)
Closed 8 years ago.
This page include two web page, insert6.php is using iframe.
This full code of the web site of the page.
form6.php
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=big5" />
<title>CCC</title>
<style>
#tlist tr:last-child td {
background-color:#CCCCCC;
}
table{
table-layout: fixed;
}
th, td {
overflow: hidden;
}
#container
{
margin-left:auto;
margin-right:auto;
width:600px;
}
</style>
</head>
<body>
<h3>New Record</h3>
<script language="JavaScript" type="text/javascript">
function addRowToTable()
{
var tbl = document.getElementById('tblSample');
var lastRow = tbl.rows.length;
// if there's no header row in the table, then iteration = lastRow + 1
var iteration = lastRow;
var row = tbl.insertRow(lastRow);
// left cell
var cellLeft = row.insertCell(0);
var che = document.createElement('input');
che.type = 'checkbox';
che.id = 'op'+ iteration;
che.name= 'checkbox';
cellLeft.appendChild(che);
// right cell
var cellRight = row.insertCell(1);
var el = document.createElement('input');
el.type = 'text';
el.name = 'txtRow[]';
el.id = 'txtRow' + iteration;
el.size = 40;
el.onkeypress = keyPressTest;
cellRight.appendChild(el);
// select cell
var cellRightSel = row.insertCell(2);
var sel = document.createElement('select');
//sel.type = 'text';
sel.name = 'selRow[]';
sel.id = 'selRow' + iteration;
sel.options[0]= new Option("<?php
mysql_connect("localhost", "root", "root") or
die("Could not connect: " . mysql_error());
mysql_select_db("partition");
$query = "SELECT tile FROM material ORDER BY `material`.`Material_ID` ASC ;";
$result = mysql_query($query);
$row = mysql_fetch_row($result);
mysql_data_seek($result,0);
while ($row=mysql_fetch_row($result))
{
for ($i=0;$i<mysql_num_fields($result);$i++)
{
if ($row[$i]=="FF")
echo($row[$i]);
}
}
mysql_free_result($result);
?>");
sel.options[1]= new Option("<?php
mysql_connect("localhost", "root", "root") or
die("Could not connect: " . mysql_error());
mysql_select_db("partition");
$query = "SELECT tile FROM material ORDER BY `material`.`Material_ID` ASC ;";
$result = mysql_query($query);
$row = mysql_fetch_row($result);
mysql_data_seek($result,0);
while ($row=mysql_fetch_row($result))
{
for ($i=0;$i<mysql_num_fields($result);$i++)
{
if ($row[$i]=="DD")
echo($row[$i]);
}
}
mysql_free_result($result);
?>");
sel.options[2]= new Option("<?php
mysql_connect("localhost", "root", "root") or
die("Could not connect: " . mysql_error());
mysql_select_db("partition");
$query = "SELECT tile FROM material ORDER BY `material`.`Material_ID` ASC ;";
$result = mysql_query($query);
$row = mysql_fetch_row($result);
mysql_data_seek($result,0);
while ($row=mysql_fetch_row($result))
{
for ($i=0;$i<mysql_num_fields($result);$i++)
{
if ($row[$i]=="TT")
echo($row[$i]);
}
}
mysql_free_result($result);
?>");
sel.options[3]= new Option("<?php
mysql_connect("localhost", "root", "root") or
die("Could not connect: " . mysql_error());
mysql_select_db("partition");
$query = "SELECT tile FROM material ORDER BY `material`.`Material_ID` ASC ;";
$result = mysql_query($query);
$row = mysql_fetch_row($result);
mysql_data_seek($result,0);
while ($row=mysql_fetch_row($result))
{
for ($i=0;$i<mysql_num_fields($result);$i++)
{
if ($row[$i]=="GG")
echo($row[$i]);
}
}
mysql_free_result($result);
?>");
sel.options[4]= new Option("<?php
mysql_connect("localhost", "root", "root") or
die("Could not connect: " . mysql_error());
mysql_select_db("partition");
$query = "SELECT tile FROM material ORDER BY `material`.`Material_ID` ASC ;";
$result = mysql_query($query);
$row = mysql_fetch_row($result);
mysql_data_seek($result,0);
while ($row=mysql_fetch_row($result))
{
for ($i=0;$i<mysql_num_fields($result);$i++)
{
if ($row[$i]=="RR")
echo($row[$i]);
}
}
mysql_free_result($result);
?>");
sel.options[5]= new Option("<?php
mysql_connect("localhost", "root", "root") or
die("Could not connect: " . mysql_error());
mysql_select_db("partition");
$query = "SELECT tile FROM material ORDER BY `material`.`Material_ID` ASC ;";
$result = mysql_query($query);
$row = mysql_fetch_row($result);
mysql_data_seek($result,0);
while ($row=mysql_fetch_row($result))
{
for ($i=0;$i<mysql_num_fields($result);$i++)
{
if ($row[$i]=="AA")
echo($row[$i]);
}
}
mysql_free_result($result);
?>");
cellRightSel.appendChild(sel);
}
function keyPressTest(e, obj)
{
var validateChkb = document.getElementById('chkValidateOnKeyPress');
if (validateChkb.checked) {
var displayObj = document.getElementById('spanOutput');
var key;
if(window.event) {
key = window.event.keyCode;
}
else if(e.which) {
key = e.which;
}
var objId;
if (obj != null) {
objId = obj.id;
} else {
objId = this.id;
}
displayObj.innerHTML = objId + ' : ' + String.fromCharCode(key);
}
}
function openInNewWindow(frm)
{
// open a blank window
var aWindow = window.open('', 'TableAddRowNewWindow',
'scrollbars=yes,menubar=yes,resizable=yes,toolbar=no,width=400,height=400');
// set the target to the blank window
frm.target = 'TableAddRowNewWindow';
// submit
frm.submit();
}
function validateRow(frm)
{
var chkb = document.getElementById('chkValidate');
if (chkb.checked) {
var tbl = document.getElementById('tblSample');
var lastRow = tbl.rows.length - 1;
var i;
for (i=1; i<=lastRow; i++) {
var aRow = document.getElementById('txtRow' + i);
if (aRow.value.length <= 0) {
alert('Row ' + i + ' is empty');
return;
}
}
}
openInNewWindow(frm);
}
function deleteAll(obj){
var checked = document.getElementsByName(obj);
debugger
for(var i = 0; i < checked.length; i ++){
if(checked[i].checked){
var tr=checked[i].parentNode.parentNode;
var tbody=tr.parentNode;
tbody.removeChild(tr);
i--;
}
}
}
</script>
<!--Input Data-->
<form action="insert6.php" method="post" target="myframe">
Series:
<?php
function series(){
mysql_connect("localhost", "root", "root") or
die("Could not connect: " . mysql_error());
mysql_select_db("partition");
$query = "SELECT Series_NAME FROM series;";
$result = mysql_query($query);
$row = mysql_fetch_row($result);
mysql_data_seek($result,0);
while ($row=mysql_fetch_row($result))
{
for ($i=0;$i<mysql_num_fields($result);$i++)
{
echo("<option>".$row[$i]."</option>");
}
}
mysql_free_result($result);
}
?>
<select name="choose series">
<?php series(); ?>
</select><br>
<?php
function height(){
mysql_connect("localhost", "root", "root") or
die("Could not connect: " . mysql_error());
mysql_select_db("partition");
$query = "SELECT height FROM width_height GROUP BY height;";
$result = mysql_query($query);
$row = mysql_fetch_row($result);
mysql_data_seek($result,0);
while ($row=mysql_fetch_row($result))
{
for ($i=0;$i<mysql_num_fields($result);$i++)
{
echo("<option>".$row[$i]."</option>");
}
}
mysql_free_result($result);
}
?>
<p>Height(MM):
<select name="height" id="height0">
<?php height(); ?>
</select></p>
<?php
function width(){
mysql_connect("localhost", "root", "root") or
die("Could not connect: " . mysql_error());
mysql_select_db("partition");
$query = "SELECT width FROM width_height GROUP BY width;";
$result = mysql_query($query);
$row = mysql_fetch_row($result);
mysql_data_seek($result,0);
while ($row=mysql_fetch_row($result))
{
for ($i=0;$i<mysql_num_fields($result);$i++)
{
echo("<option>".$row[$i]."</option>");
}
}
mysql_free_result($result);
}
?>
<p>Width (MM):
<select name="width" id="width0">
<option><?php width(); ?></option>
</select><br>
<table border="1" id="tblSample">
<tr>
<td><input type="checkbox" id="op0" name="checkbox">
</td>
<td><input type="text" name="txtRow[]"
id="txtRow0" size="40"/></td>
<td>
<select name="selRow[]" id="selRow0">
<?php
mysql_connect("localhost", "root", "root") or
die("Could not connect: " . mysql_error());
mysql_select_db("partition");
$query = "SELECT tile FROM material ORDER BY `material`.`Material_ID` ASC ;";
$result = mysql_query($query);
$row = mysql_fetch_row($result);
mysql_data_seek($result,0);
while ($row=mysql_fetch_row($result))
{
for ($i=0;$i<mysql_num_fields($result);$i++)
{
echo("<option>".$row[$i]."</option>");
}
}
mysql_free_result($result);
?>
</select>
</td>
</tr>
</table>
<input type="button" value="Add" onClick="addRowToTable();" />
<input type="button" name="delete_button" value="Delete" onClick="deleteAll('checkbox');" />
<input type="submit" name="submit" value="Submit" onclick="test();"/>
</form>
<script src="https://dl.dropboxusercontent.com/u/19096175/blog/selectDate/selectDate.js" type="text/javascript"></script>
Choose Date：<input onfocus="HS_setDate(this)" readonly="" type="text" value="Check" />
<br />
<hr/>
<iframe src="insert6.php" name="myframe" id="myframe" width="650" height="400" scrolling="no" frameborder="0">
</iframe>
</body>
</html>
This full code of the web site of the page.
insert6.php
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>DDD</title>
<style>
#tlist tr:last-child td {
background-color:#CCCCCC;
}
table{
table-layout: fixed;
}
th, td {
overflow: hidden;
}
#container
{
margin-left:auto;
margin-right:auto;
width:600px;
}
</style>
</head>
<body>
<?php
/*
$name = $_POST['selRow'];
$qty = $_POST['txtRow'];
foreach( $qty as $v ) {
print $v."<br>";
}
foreach( $name as $v ) {
print $v."<br>";
}
*/
?>
<script>
function delrecord(obj)
{
obj.parentNode.parentNode.parentNode.removeChild(obj.parentNode.parentNode);
var delbutton=document.getElementsByName("del");
var newzum=0;
for(var j=1;j <document.getElementsByName("del").length+1;j++)
{
newzum+=parseFloat(document.getElementById('total'+j).innerHTML);
}
znum.innerHTML =newzum;
}
function caltotal(e){
var fqty=document.getElementById('qty' +iteration);
var fprice=document.getElementById('price' + iteration);
var ftotal=document.getElementById('total'+ iteration);
var delbutton=document.getElementsByName("del");
ftotal.innerHTML= fqty.innerHTML * fprice.innerHTML;
newzum =0;
for(var j=1;j <=document.getElementsByName("del").length;j++)
{
newzum += parseFloat(document.getElementById('total'+j).innerHTML);
}
znum.innerHTML = newzum;
}
</script>
<div class="container">
<table width="450" border="0" cellspacing="1" cellpadding="0" class="tb" id="tlist">
<tr class="tit2">
<td>QTY </td>
<td>TILE </td>
<td>HEIGHT </td>
<td>WIDTH </td>
<td>PRICE </td>
<td>TOTAL </td>
<td>Action </td>
</tr>
<tr class="tit3">
<?php
if(isset($_POST["submit"])){
$t=count($_POST['selRow']);
$w=count($_POST['txtRow']);
for($i=0;$i<$t;$i++)
{
$qty[$i]= $_POST['txtRow'][$i];
$tile[$i]= $_POST['selRow'][$i];
$height = $_POST['height'];
$width = $_POST['width'];
echo "<tr class='tit3'><td>";
echo "".$qty[$i]."<br>";
echo "</td>";
echo "<td>";
echo "".$tile[$i]."<br>";
echo "</td>";
echo "<td>";
echo "".$height."<br>";
echo "</td>";
echo "<td>";
echo "".$width."<br>";
echo "</td>";
echo "<td>";
mysql_connect("localhost", "root", "root") or
die("Could not connect: " . mysql_error());
mysql_select_db("partition");
//foreach($_POST['selRow'] as $tile){
$query = "SELECT `Price` FROM `actualpanelmaterialsize` WHERE `Material ID` IN (SELECT `Material_ID` FROM `material` WHERE `Tile` = '".$tile[$i]."') AND `Width_Height ID` IN (SELECT `Width_Height ID` FROM `width_height` WHERE `Width` =".$_POST['width']." AND `Height` =".$_POST['height'].");";
$result = mysql_query($query);
$row = mysql_fetch_row($result);
mysql_data_seek($result,0);
while ($row=mysql_fetch_row($result))
{
$price = $row[0];
echo $price."<br>";
}
//}
echo "</td>";
echo "<td id='total[$i]'>";
echo $total[$i]=$price*$qty[$i];
echo "</td>";
echo "<td>";
echo "<input type='button' value='Delete' name='del' onclick='delrecord(this);'>";
echo "</td>";
echo "</tr>";
}
echo "<script>";
echo "newzum =0;";
echo "for(var j=0;j <=document.getElementsByName('del').length+1;j++) {" ;
echo "for (var i=0;i<=document.getElementById('total['+i+']').innerHTML.length;i++){";
echo "newzum += parseFloat(document.getElementById('total['+i+']').innerHTML);";
echo "}";
echo "}";
echo "document.getElementById('znum').innerHTML = newzum;";
echo "</script>";
}
?>
</tr>
<tr class="tit3"> <td>Total </td> <td colspan=3> </td> <td colspan=2 align='right'> <b id="znum">0</b> </td> <td colspan=1> </td> </tr>
</table>
<script>
/*
for (var i=0;i<=document.getElementById("total["+i+"]").innerHTML.length;i++){
window.alert(document.getElementById("total["+i+"]").innerHTML);
}
*/
function Check(){
for (var i=0;i<=document.getElementById("total["+i+"]").innerHTML.length;i++){
window.alert(newzum);
}
}
</script>
<input type="button" value="Check" onClick="Check();"/>
</div>
</body>
</html>
Last, I was ask you guys about why znum.innerHTML cannot change the value.
Now, I put the javascript code inside the php language, the result still wrong...
My expected result:
Now I see the result:
After click the Check button to see newznum is correct but znum.innerHTML could not change this value
When pass the form to insert6.php, the total should be change the value.
Now, I cannot do it.
Anyone see the problem here?
Please you help me, I dun know where i get a mistake.
Thank you for reading my question!
I hope i will received the answer to help me to solve the problem

At first, Separation of logic is very important and what i see frmo your code is you are making DB calls from your view itself. Which shows poor way of coding. It will make it difficult to manager your code.
sel.options[0]= new Option("<?php
mysql_connect("localhost", "root", "root") or
die("Could not connect: " . mysql_error());
mysql_select_db("partition");
$query = "SELECT tile FROM material ORDER BY `material`.`Material_ID` ASC ;";
$result = mysql_query($query);
$row = mysql_fetch_row($result);
mysql_data_seek($result,0);
while ($row=mysql_fetch_row($result))
{
for ($i=0;$i<mysql_num_fields($result);$i++)
{
if ($row[$i]=="FF")
echo($row[$i]);
}
}
mysql_free_result($result);
?>");
Now answer to your question:
echo "newzum =0;";
echo "for(var j=0;j <=document.getElementsByName('del').length+1;j++) {" ;
echo "for (var i=0;i<=document.getElementById('total['+i+']').innerHTML.length;i++){";
echo "newzum += parseFloat(document.getElementById('total['+i+']').innerHTML);";
echo "}";
echo "}";
echo "document.getElementById('znum').innerHTML = newzum;";
echo "</script>";
This lines of code will be executed before the page is loaded as its php.
as a result, when the page is rendered the script will not find document.getElementsByName('del') so it will throw undefined error.
To overcome this, Do those actions in onload function.
window.onload = function() {
// Inside this method put those lines. It will work.
}

Your code is too long, but I will try to answer from your title.
You must understand how php and javascript work. php is a server-side language, while javascript is a client side language. You can NOT execute php inside javascript. php does the processing on the server and then returns the results to the client. After this, the server is not aware of the client state.
In order to change the value of innerHTML, you can just use javascript. If you need to somehow interact with php, you should send AJAX calls to the server, where the php script can process and return new data.

The PHP will just echo the Javascript code, which is fine, but needlessly complex. You can just enter the Javascript code in the page.
The actual problem right now is this line:
document.getElementById('znum').innerHTML = newzum;
It is a line of Javascript in the global scope, and it will be executed as soon as the browser encounters it during the loading of the page.
But the element is should modify ('znum') is a couple of lines lower on the page:
<b id="znum">0</b>
That basically means that the element is not ready yet when the script is executed, so it cannot be found.
The solution is relatively simple: Execute the Javascript later (at the bottom) of the page, so it will execute when all relevant elements are already loaded.
Script errors like this result in an error or a warning which should be visible in the Console tab in the developer tools (F12) of your browser. So make sure you always look at that when debugging Javascript. It's really a tool you should master as a web developer. :)