Php and ajax multiple dropdown menu onChange function - javascript

I want to choose province on the basis of state selected. This option is working fine, but when I add a new dropdown box for district that depends on the province option, and so on, all other option are not working and are displaying all values from the database not on the basis of the selected drop down menu ...[![enter image description here][1]][1]
include.php code:
<?php
$con=mysql_connect('localhost','root','') or die('Mysql not connected');
mysql_select_db('location',$con) or die('DataBase not connected');
?>
<html>
<head>
<script type="text/javascript" src="js/ajax.js"></script>
<script type="text/javascript" src="js/ajax1.js">
</script>
</head>
<body>
<h1>Address<br/></h1>
<form>
<select name="state" style="padding:10px;width:200px;font-size:20px;" onChange="display(this.value)">
<option value="" selected="selected">-- Select Country --</option>
<?php
$query1="select * from tbl_state";
$query1_result=mysql_query($query1)or mysql_error();
while($row=mysql_fetch_array($query1_result))
{
?>
<option value="<?php echo $row['id']; ?>"><?php echo $row['state_name']; ?></option>
<?php
}
?>
</select>
<div id="show_city">
<select name="city" style="padding:10px;width:200px;font-size:20px; " onChange="display1(this.value)">
<option value="" selected="selected">-- Select Province --</option>
</select>
</div>
<br>
<div id1="show_Dist">
<select name="dist" style="padding:10px;width:200px;font-size:20px;">
<option value="" selected="selected">-- Select Dist --</option>
<?php
$query="select * from tbl_dist";
$query_result=mysql_query($query)or mysql_error();
while($row=mysql_fetch_array($query_result))
{
?>
<option value="<?php echo $row['Dist_id']; ?>"><?php echo $row['Dist_Name']; ?></option>
<?php
}
?>
</select>
</div>
<br>
<div id1="show_Dist">
<select name="dist" style="padding:10px;width:200px;font-size:20px;">
<option value="" selected="selected">-- Select Tehsil --</option>
<br>
<?php
$query="select * from tbl_tehsil";
$query_result=mysql_query($query)or mysql_error();
while($row=mysql_fetch_array($query_result))
{
?>
<option value="<?php echo $row['tehsil_id']; ?>"><?php echo $row['tehsil_Name']; ?></option>
<?php
}
?>
</select>
</div>
<br>
<div id1="show_UC">
<select name="dist" style="padding:10px;width:200px;font-size:20px;">
<option value="" selected="selected">-- Select Union Concil--</option>
<br>
<?
$query="select * from tbl_tehsil";
$query_result=mysql_query($query)or mysql_error();
while($row=mysql_fetch_array($query_result))
{
?>
<option value="<?php echo $row['tehsil_id']; ?>"><?php echo $row['tehsil_Name']; ?></option>
<?php
?>
</select>
</div>
<br>
<div id1="show_Villages">
<select name="dist" style="padding:10px;width:200px;font-size:20px;">
<option value="" selected="selected">-- Select Villages--</option>
<br>
<?php
$query="select * from tbl_tehsil";
$query_result=mysql_query($query)or mysql_error();
while($row=mysql_fetch_array($query_result))
{
?>
<option value="<?php echo $row['tehsil_id']; ?>"><?php echo $row['tehsil_Name']; ?></option>
<?php
}
?>
</select>
</div>
</form>
</body>
</html>
getcity code:
<?php
$con=mysql_connect('localhost','root','') or die('Mysql not connected');
mysql_select_db('location',$con) or die('DataBase not connected');
$state_id=$_REQUEST['state_id'];
$query="select * from tbl_city where state_id='$state_id'";
?>
<select name="city" style="padding:10px;width:200px;font-size:20px;">
<option value="" selected="selected">-- Select city --</option>
<?php
$query_result=mysql_query($query)or mysql_error();
while($row=mysql_fetch_array($query_result))
{
?>
<option value="<?php echo $row['id']; ?>"><?php echo $row['city_name']; ?></option>
<?php
}
?>
</select>
getdist.php code:
<?php
$con=mysql_connect('localhost','root','') or die('Mysql not connected');
mysql_select_db('location',$con) or die('DataBase not connected');
$city_id=$_REQUEST['city_id'];
$query="select * from tbl_Dist where city_id='$city_id'";
echo "Error";
?>
<select name="city" style="padding:10px;width:200px;font-size:20px;">
<option value="" selected="selected">-- Select Dist --</option>
<?php
$query_result=mysql_query($query)or mysql_error();
while($row=mysql_fetch_array($query_result))
{
?>
<option value="<?php echo $row['Dist_id']; ?>"><?php echo $row['Dist_Name']; ?></option>
<?php
}
?>
</select>
ajax file:
// JavaScript Document
var XMLHttpRequestObject=false;
function display(state_id)
{
if(window.XMLHttpRequest)
{
XMLHttpRequestObject=new XMLHttpRequest();
}
else if(window.ActiveXObject)
{
XMLHttpRequestObject=new ActiveXObject("Microsoft.XMLHTTP");
}
XMLHttpRequestObject.onreadystatechange=function()
{
if (XMLHttpRequestObject.readyState==4 && XMLHttpRequestObject.status==200)
{
document.getElementById("show_city").innerHTML=XMLHttpRequestObject.responseText;
}
}
XMLHttpRequestObject.open("GET","getcity.php?state_id="+state_id,true);
XMLHttpRequestObject.send();
}
ajax1 file:
var XMLHttpRequestObject=false;
function display1(dist_id)
{
if(window.XMLHttpRequest)
{
XMLHttpRequestObject=new XMLHttpRequest();
}
else if(window.ActiveXObject)
{
XMLHttpRequestObject=new ActiveXObject("Microsoft.XMLHTTP");
}
XMLHttpRequestObject.onreadystatechange=function()
{
if (XMLHttpRequestObject.readyState==4 && XMLHttpRequestObject.status==200)
{
document.getElementById("show_Dist").innerHTML=XMLHttpRequestObject.responseText;
}
}
XMLHttpRequestObject.open("GET","getdist.php?city_id="+city_id,true);
XMLHttpRequestObject.send();
}
How can I use the AJAX file properly?


See I Can't go through all your codes. I'm having my code. Just go through it.
Try using this. Use little brain. And, you will not have any problem.
~ #imDEnam
View.php
<select class='form-control City' name='StoreCity' required>
<option value="">Select City</option>
<?
$QueryCity=mysql_query("SELECT * FROM AubreeCities");
while($RowCt=mysql_fetch_array($QueryCity))
{?>
<option value="<?echo $RowCt['ACityNo'];?>"><?echo $RowCt['ACName'];?></option>
<?}?>
</select>
<div class='Stores'>
//Here, we will show all details which is coming from AjaxSelectStores.php Page..
</div>
**Ajax Call**
$('.City').change(function(){
var CityNo= $('.City').val();
$.ajax({url:"AjaxSelectStores.php?CityNo="+CityNo,cache:false,success:function(result){
$('.Stores').html(result);
}});
});
AjaxSelectStores.php
<?
include("open-db-connection.php");
extract($_GET);
$RecentMonth=date("F");
?>
<div class='row'>
<div class='col-md-2'><label>Select Store</label></div>
<div class='col-md-4'>
<select class='form-control' name='StoreNo'>
<option value="">Select Store</option>
<?
$QueryStore=mysql_query("SELECT * FROM AubreeStores WHERE AStoreCity='$CityNo' ");
while($RowS=mysql_fetch_array($QueryStore))
{?>
<option value="<?echo $RowS['AStoreNo'];?>"><?echo $RowS['AStoreName'];?></option>
<?}?>
</select>
</div>
</div>

Related

.select2() is showing the original and select2 dropdown

I'm currently using Select2 for my dropdown. When I initiate the dropdown, it renders the original dropdown and the select2 dropdown. How can I fix this?
$('#itemSelect1').select2();
<select class="itemSelect1">
<option value="">Select an item</option>
<?php if (!empty($material)) {?>
<?php foreach ($material as $key => $value) { ?>
<option value="<?php echo $value['material_unique_key']; ?>" data-price="<?php echo $value['material_price']; ?>">
<?php echo $value['material_name'] ?>
</option>
<?php } ?>
<?php } ?>
</select>

How to insert student subject and grade into the database in a better way?

I am a beginner to php and am designing student information system where students need to enter 9 subject and its corresponding grade based on the number of sittings. Is there any better way to do this apart from what I have been doing?
These are my codes.
<script type="text/javascript">
function showDiv(select){
if(select.value==2){
document.getElementById('div2a').style.display = "block";
} else{
document.getElementById('div2a').style.display = "none";
}
}
</script>
<style>
.striped-border {
border: 1px solid #0d4115;
margin: auto;
margin-top: 5%;
margin-bottom: 2%;
}
.form2a{
display: none;
}
</style>
<form name="register" method="POST" action="process2.php" >
<div class="col-md-12">
<div class="form-group">
<label>Select Number of Sitting(s)</label>
<select name="sitting" id="sitting" class="form-control" onchange="showDiv(this)">
<option value="1">1</option>
<option value="2">2</option>
</select>
</div>
</div>
<div class="output1" id="div1" name="onesitting">
<div class="col-md-6">
<div class="form-group">
<label>School Name</label>
<input type="text" name="schoolname1" id="schoolname" class="form-control" placeholder="School Name" required>
</div>
</div>
<div class="col-md-6">
<div class="form-group">
<label>Exam Type</label>
<select name="examboard1" id="examboard" class="form-control" required>
<option value="">Exam Type</option>
<option value="WAEC">WAEC(SSCE)</option>
<option value="WAEC">WAEC(GCE)</option>
<option value="NECO">NECO(SSCE)</option>
<option value="NECO">NECO(GCE)</option>
<option value="NABTEB">NABTEB(SSCE)</option>
<option value="NABTEB">NABTEB(GCE)</option>
<option value="OTHERS">OTHERS</option>
</select>
</div>
</div>
<div class="col-md-6">
<div class="form-group">
<label>Exam Date</label>
<?php
$examyear = range(1960, 2050);
?>
<select class="form-control" name="examdate1" id="examdate" placeholder="Exam Date">
<option value="">Select date</option>
<?php
foreach($examyear as $examdate){
echo '<option value= "' .$examdate.'">'.$examdate.'</option>';
}
?>
</select>
</div>
</div>
<div class="col-md-6">
<div class="form-group">
<label>Exam Number</label>
<input type="text" class="form-control" name="examno1" id="examno" placeholder="Exam Number">
</div>
</div>
<br>
<table width="100%" cellpadding="0" cellspacing="0" border="0" class="table table-borderless" id="example">
<tr>
<td width="12%"><label class="control-label">S/NO</label></td>
<td width="53%"><label class="control-label">SUBJECTS</label></td>
<td width="35%"><label class="control-label">GRADE</label></td>
</tr>
<tr>
<td>1</td>
<td>
<?php include("config.php");
$sql = "SELECT * FROM subjects ORDER BY subject_name ASC";
$query = mysqli_query($conn, $sql);
$count = mysqli_num_rows($query);
?>
<select name="subject11" class="form-control" id="subject">
<option value="" selected="selected">Select subject</option>
<?php
if($count > 0){
while($row = mysqli_fetch_assoc($query)){
$subject_id = $row['subject_id'];
$subject_name = $row['subject_name'];
echo "<option>" . $row['subject_name'] . "</option>";
}
}else{
echo "<option value = ''>Subject not available</option>";
}
?>
</select>
</td>
<td>
<select name="grade11" class="form-control">
<option value=""> Select</option>
<option value="A1">A1</option>
<option value="B2">B2</option>
<option value="B3">B3</option>
<option value="C4">C4</option>
<option value="C5">C5</option>
<option value="C6">C6</option>
<option value="D7">D7</option>
<option value="E8">E8</option>
<option value="F9">F9</option> </select>
</td>
</tr>
<tr>
<td>2</td>
<td>
<?php include("config.php");
$sql = "SELECT * FROM subjects ORDER BY subject_name ASC";
$query = mysqli_query($conn, $sql);
$count = mysqli_num_rows($query);
?>
<select name="subject12" class="form-control" id="subject">
<option value="" selected="selected">Select subject</option>
<?php
if($count > 0){
while($row = mysqli_fetch_assoc($query)){
$subject_id = $row['subject_id'];
$subject_name = $row['subject_name'];
echo "<option>" . $row['subject_name'] . "</option>";
}
}else{
echo "<option value = ''>Subject not available</option>";
}
?>
</select>
</td>
<td>
<select name="grade12" class="form-control">
<option value=""> Select </option>
<option value="A1">A1</option>
<option value="B2">B2</option>
<option value="B3">B3</option>
<option value="C4">C4</option>
<option value="C5">C5</option>
<option value="C6">C6</option>
<option value="D7">D7</option>
<option value="E8">E8</option>
<option value="F9">F9</option> </select>
</td>
</tr>
<tr>
<td>3</td>
<td>
<?php include("config.php");
$sql = "SELECT * FROM subjects ORDER BY subject_name ASC";
$query = mysqli_query($conn, $sql);
$count = mysqli_num_rows($query);
?>
<select name="subject13" class="form-control" id="subject">
<option value="" selected="selected">Select subject</option>
<?php
if($count > 0){
while($row = mysqli_fetch_assoc($query)){
$subject_id = $row['subject_id'];
$subject_name = $row['subject_name'];
echo "<option>" . $row['subject_name'] . "</option>";
}
}else{
echo "<option value = ''>Subject not available</option>";
}
?>
</select>
</td>
<td>
<select name="grade13" class="form-control">
<option value=""> Select </option>
<option value="A1">A1</option>
<option value="B2">B2</option>
<option value="B3">B3</option>
<option value="C4">C4</option>
<option value="C5">C5</option>
<option value="C6">C6</option>
<option value="D7">D7</option>
<option value="E8">E8</option>
<option value="F9">F9</option> </select>
</td>
</tr>
<tr>
<td>4</td>
<td>
<?php include("config.php");
$sql = "SELECT * FROM subjects ORDER BY subject_name ASC";
$query = mysqli_query($conn, $sql);
$count = mysqli_num_rows($query);
?>
<select name="subject14" class="form-control" id="subject">
<option value="" selected="selected">Select subject</option>
<?php
if($count > 0){
while($row = mysqli_fetch_assoc($query)){
$subject_id = $row['subject_id'];
$subject_name = $row['subject_name'];
echo "<option>" . $row['subject_name'] . "</option>";
}
}else{
echo "<option value = ''>Subject not available</option>";
}
?>
</select>
</td>
<td>
<select name="grade14" class="form-control">
<option value=""> Select </option>
<option value="A1">A1</option>
<option value="B2">B2</option>
<option value="B3">B3</option>
<option value="C4">C4</option>
<option value="C5">C5</option>
<option value="C6">C6</option>
<option value="D7">D7</option>
<option value="E8">E8</option>
<option value="F9">F9</option> </select>
</td>
</tr>
<tr>
<td>5</td>
<td>
<?php include("config.php");
$sql = "SELECT * FROM subjects ORDER BY subject_name ASC";
$query = mysqli_query($conn, $sql);
$count = mysqli_num_rows($query);
?>
<select name="subject15" class="form-control" id="subject">
<option value="" selected="selected">Select subject</option>
<?php
if($count > 0){
while($row = mysqli_fetch_assoc($query)){
$subject_id = $row['subject_id'];
$subject_name = $row['subject_name'];
echo "<option>" . $row['subject_name'] . "</option>";
}
}else{
echo "<option value = ''>Subject not available</option>";
}
?>
</select>
</td>
<td>
<select name="grade15" class="form-control">
<option value="">Select </option>
<option value="A1">A1</option>
<option value="B2">B2</option>
<option value="B3">B3</option>
<option value="C4">C4</option>
<option value="C5">C5</option>
<option value="C6">C6</option>
<option value="D7">D7</option>
<option value="E8">E8</option>
<option value="F9">F9</option> </select>
</td>
</tr>
</table>
<br>
</div>
<div class="form2a" id="div2a" name="twositting">
<br>
<h4 style="text-align:center; margin-top: 0px; margin-bottom: 5%; background-color:#0d4115; width: auto; color: white;"> SECOND SITTING</h4>
<div class="col-md-6">
<div class="form-group">
<label>School Name</label>
<input type="text" name="schoolname2" id="schoolname" class="form-control" placeholder="School Name" required>
<span id="error_schoolname" class="text-danger"></span>
</div>
</div>
<div class="col-md-6">
<div class="form-group">
<label>Exam Type</label>
<select name="examboard2" id="examboard" class="form-control" required>
<option value="">Exam Type</option>
<option value="WAEC">WAEC(SSCE)</option>
<option value="WAEC">WAEC(GCE)</option>
<option value="NECO">NECO(SSCE)</option>
<option value="NECO">NECO(GCE)</option>
<option value="NABTEB">NABTEB(SSCE)</option>
<option value="NABTEB">NABTEB(GCE)</option>
<option value="OTHERS">OTHERS</option>
<span id="error_examboard" class="text-danger"></span>
</select>
</div>
</div>
<div class="col-md-6">
<div class="form-group">
<label>Exam Date</label>
<?php
$examyear = range(1960, 2099);
?>
<select class="form-control" name="examdate2" id="examdate" placeholder="Exam Date">
<option value="">Select date</option>
<?php
foreach($examyear as $examdate){
echo '<option value= "' .$examdate.'">'.$examdate.'</option>';
}
?>
<span id="error_examdate" class="text-danger"></span>
</select>
</div>
</div>
<div class="col-md-6">
<div class="form-group">
<label>Exam Number</label>
<input type="text" class="form-control" name="examno2" id="examno" placeholder="Exam Number">
<span id="error_examno" class="text-danger"></span>
</div>
</div>
<br>
<table width="100%" cellpadding="0" cellspacing="0" border="0" class="table table-borderless" id="example">
<tr>
<td width="12%"><label class="control-label">S/NO</label></td>
<td width="53%"><label class="control-label">SUBJECTS</label></td>
<td width="35%"><label class="control-label">GRADE</label></td>
</tr>
<tr>
<td>1</td>
<td>
<?php include("config.php");
$sql = "SELECT * FROM subjects ORDER BY subject_name ASC";
$query = mysqli_query($conn, $sql);
$count = mysqli_num_rows($query);
?>
<select name="subject21" class="form-control" id="subject">
<option value="" selected="selected">Select subject</option>
<?php
if($count > 0){
while($row = mysqli_fetch_assoc($query)){
$subject_id = $row['subject_id'];
$subject_name = $row['subject_name'];
echo "<option>" . $row['subject_name'] . "</option>";
}
}else{
echo "<option value = ''>Subject not available</option>";
}
?>
</select>
</td>
<td>
<select name="grade21" class="form-control">
<option value=""> Select</option>
<option value="A1">A1</option>
<option value="B2">B2</option>
<option value="B3">B3</option>
<option value="C4">C4</option>
<option value="C5">C5</option>
<option value="C6">C6</option>
<option value="D7">D7</option>
<option value="E8">E8</option>
<option value="F9">F9</option> </select>
</td>
</tr>
<tr>
<td>2</td>
<td>
<?php include("config.php");
$sql = "SELECT * FROM subjects ORDER BY subject_name ASC";
$query = mysqli_query($conn, $sql);
$count = mysqli_num_rows($query);
?>
<select name="subject22" class="form-control" id="subject">
<option value="" selected="selected">Select subject</option>
<?php
if($count > 0){
while($row = mysqli_fetch_assoc($query)){
$subject_id = $row['subject_id'];
$subject_name = $row['subject_name'];
echo "<option>" . $row['subject_name'] . "</option>";
}
}else{
echo "<option value = ''>Subject not available</option>";
}
?>
</select>
</td>
<td>
<select name="grade22" class="form-control">
<option value=""> Select </option>
<option value="A1">A1</option>
<option value="B2">B2</option>
<option value="B3">B3</option>
<option value="C4">C4</option>
<option value="C5">C5</option>
<option value="C6">C6</option>
<option value="D7">D7</option>
<option value="E8">E8</option>
<option value="F9">F9</option> </select>
</td>
</tr>
<tr>
<td>3</td>
<td>
<?php include("config.php");
$sql = "SELECT * FROM subjects ORDER BY subject_name ASC";
$query = mysqli_query($conn, $sql);
$count = mysqli_num_rows($query);
?>
<select name="subject23" class="form-control" id="subject">
<option value="" selected="selected">Select subject</option>
<?php
if($count > 0){
while($row = mysqli_fetch_assoc($query)){
$subject_id = $row['subject_id'];
$subject_name = $row['subject_name'];
echo "<option>" . $row['subject_name'] . "</option>";
}
}else{
echo "<option value = ''>Subject not available</option>";
}
?>
</select>
</td>
<td>
<select name="grade23" class="form-control">
<option value=""> Select </option>
<option value="A1">A1</option>
<option value="B2">B2</option>
<option value="B3">B3</option>
<option value="C4">C4</option>
<option value="C5">C5</option>
<option value="C6">C6</option>
<option value="D7">D7</option>
<option value="E8">E8</option>
<option value="F9">F9</option> </select>
</td>
</tr>
<tr>
<td>4</td>
<td>
<?php include("config.php");
$sql = "SELECT * FROM subjects ORDER BY subject_name ASC";
$query = mysqli_query($conn, $sql);
$count = mysqli_num_rows($query);
?>
<select name="subject24" class="form-control" id="subject">
<option value="" selected="selected">Select subject</option>
<?php
if($count > 0){
while($row = mysqli_fetch_assoc($query)){
$subject_id = $row['subject_id'];
$subject_name = $row['subject_name'];
echo "<option>" . $row['subject_name'] . "</option>";
}
}else{
echo "<option value = ''>Subject not available</option>";
}
?>
</select>
</td>
<td>
<select name="grade24" class="form-control">
<option value=""> Select </option>
<option value="A1">A1</option>
<option value="B2">B2</option>
<option value="B3">B3</option>
<option value="C4">C4</option>
<option value="C5">C5</option>
<option value="C6">C6</option>
<option value="D7">D7</option>
<option value="E8">E8</option>
<option value="F9">F9</option> </select>
</td>
</tr>
<tr>
<td>5</td>
<td>
<?php include("config.php");
$sql = "SELECT * FROM subjects ORDER BY subject_name ASC";
$query = mysqli_query($conn, $sql);
$count = mysqli_num_rows($query);
?>
<select name="subject25" class="form-control" id="subject">
<option value="" selected="selected">Select subject</option>
<?php
if($count > 0){
while($row = mysqli_fetch_assoc($query)){
$subject_id = $row['subject_id'];
$subject_name = $row['subject_name'];
echo "<option>" . $row['subject_name'] . "</option>";
}
}else{
echo "<option value = ''>Subject not available</option>";
}
?>
</select>
</td>
<td>
<select name="grade25" class="form-control">
<option value="">Select </option>
<option value="A1">A1</option>
<option value="B2">B2</option>
<option value="B3">B3</option>
<option value="C4">C4</option>
<option value="C5">C5</option>
<option value="C6">C6</option>
<option value="D7">D7</option>
<option value="E8">E8</option>
<option value="F9">F9</option> </select>
</td>
</tr>
</table>
</div>
<button type="submit" class="btn btn-primary" name="submit">Submit</button>
</form>
The above is my HTML and JavaScript codes. Am using that JavaScript to display form based on the no of sittings selected.
Below is my PHP code
$sitting = mysqli_real_escape_string($conn, $_POST['sitting']);
$schoolname1 = mysqli_real_escape_string($conn, $_POST['schoolname1']);
$examboard1 = mysqli_real_escape_string($conn, $_POST['examboard1']);
$examdate1 = mysqli_real_escape_string($conn, $_POST['examdate1']);
$examno1 = mysqli_real_escape_string($conn, $_POST['examno1']);
$subject11 = mysqli_real_escape_string($conn, $_POST['subject11']);
$grade11 = mysqli_real_escape_string($conn, $_POST['grade11']);
$subject12 = mysqli_real_escape_string($conn, $_POST['subject12']);
$grade12 = mysqli_real_escape_string($conn, $_POST['grade12']);
$subject13 = mysqli_real_escape_string($conn, $_POST['subject13']);
$grade13 = mysqli_real_escape_string($conn, $_POST['grade13']);
$subject14 = mysqli_real_escape_string($conn, $_POST['subject14']);
$grade14 = mysqli_real_escape_string($conn, $_POST['grade14']);
$subject15 = mysqli_real_escape_string($conn, $_POST['subject15']);
$grade15 = mysqli_real_escape_string($conn, $_POST['grade15']);
$schoolname2 = mysqli_real_escape_string($conn, $_POST['schoolname2']);
$examboard2 = mysqli_real_escape_string($conn, $_POST['examboard2']);
$examdate2 = mysqli_real_escape_string($conn, $_POST['examdate2']);
$examno2 = mysqli_real_escape_string($conn, $_POST['examno2']);
$subject21 = mysqli_real_escape_string($conn, $_POST['subject21']);
$grade21 = mysqli_real_escape_string($conn, $_POST['grade21']);
$subject22 = mysqli_real_escape_string($conn, $_POST['subject22']);
$grade22 = mysqli_real_escape_string($conn, $_POST['grade22']);
$subject23 = mysqli_real_escape_string($conn, $_POST['subject23']);
$grade23 = mysqli_real_escape_string($conn, $_POST['grade23']);
$subject24 = mysqli_real_escape_string($conn, $_POST['subject24']);
$grade24 = mysqli_real_escape_string($conn, $_POST['grade24']);
$subject25 = mysqli_real_escape_string($conn, $_POST['subject25']);
$grade25 = mysqli_real_escape_string($conn, $_POST['grade25']);
$enter = "INSERT INTO applicants(sitting, schoolname1, examboard1,
examdate1, examno1, subject11, grade11, subject12, grade12, subject13,
grade13, subject14, grade14, subject15, grade15, schoolname2, examboard2,
examdate2, examno2, subject21, grade21, subject22, grade22, subject23,
grade23, subject24, grade24, subject25, grade25) VALUES('$sitting',
'$schoolname1', '$examboard1', '$examdate1', '$examno1', '$subject11',
'$grade11', '$subject12', '$grade12', '$subject13', '$grade13',
'$subject14', '$grade14', '$subject15', '$grade15','$schoolname2',
'$examboard2', '$examdate2', '$examno2', '$subject21', '$grade21',
'$subject22', '$grade22', '$subject23', '$grade23', '$subject24',
'$grade24', '$subject25', '$grade25')";
$result = mysqli_query($conn, $enter);
if($result){
echo "<script type='text/javascript'>alert('Details Uploaded !!');
</script>";
header('location: success.php');
}else{
echo "<script type='text/javascript'>alert('Details Failed !!');</script>";
}
}
Is there any better way to do this without repeating all those subjects and grades?

You're getting into a pickle with your form names. PHP makes this a little bit easier by allowing you to specify array names in forms:
<?php
if ($_POST)
{
echo "<pre>";
print_r($_POST);
echo "</pre>";
}
?>
<form method="post">
Grades:
<input name="grade[]" type="text">
<input name="grade[]" type="text">
<input name="grade[]" type="text">
<hr>
<input type="submit" value="Submit">
</form>
This produces this post output, which is easy to loop over:
Array
(
[grade] => Array
(
[0] => 1
[1] => 2
[2] => 3
)
)
That works for lists of data, but your use-case has an additional dimension, which makes this harder. You have:
a first-order list containing school name, exam board, exam date, and exam number
a second-order list belonging to the first one, which contains subjects and grades
However, PHP will support that too, by letting you specify which sub-list the second-order lists belong to:
<?php
if ($_POST)
{
echo "<pre>";
print_r($_POST);
echo "</pre>";
}
?>
<form method="post">
Board: <input name="board[]" type="text">
Grades:
<input name="grade[0][]" type="text">
<input name="grade[0][]" type="text">
<input name="grade[0][]" type="text">
<hr>
Board: <input name="board[]" type="text">
Grades:
<input name="grade[1][]" type="text">
<input name="grade[1][]" type="text">
<input name="grade[1][]" type="text">
<hr>
<input type="submit" value="Submit">
</form>
This produces this arrangement:
Array
(
[board] => Array
(
[0] => a
[1] => b
)
[grade] => Array
(
[0] => Array
(
[0] => 1
[1] => 2
[2] => 3
)
[1] => Array
(
[0] => 4
[1] => 5
[2] => 6
)
)
)
You can see here that the 0th entry in board is the exam board (first order list) and the 0th entry in grade is a list in itself (second order list pertaining to the 0th board).
I will leave it to you as a valuable exercise to add the other elements to the first and second-order lists here.
In relation to the table, that is a broad enough topic to merit another question on its own. The structure of this needs to be normalised, so you hold exam boards, exams, students and grades in separate tables. The "grade" is probably the central table, since that requires an exam and a student, and the exam in turn requires a board.

Bring the Options from database table in 2nd Select box based on the value selected in 1st Select Box

I searched a lot about this topic and found difficult approaches mostly not working. I have 2 Select boxes (class & student) which should be dynamically generated. After selecting the Class, the 2nd Select Box should show the Option Values from the Students Table.
<form action="" class="form-horizontal" method="POST">
<h4>Issue Book: </h4><hr>
<label class="control-label" for="class">Class</label>
<select id="class" name="class" class="form-control">
<option value="">Select Class</option>
<?php
$class_query = "SELECT * FROM `classes` ";
$class_result = mysql_query($class_query);
do{
$class_row = mysql_fetch_array($class_result);
if($class_row){
$class_id = $class_row['id'];
$class_name = $class_row['class'];
?>
<option value="<?php echo $class_id; ?>"><?php echo $class_name; ?></option>
<?php
}
}while($class_row);
?>
</select>
<label class="control-label" for="student">Student</label>
<select id="student" name="student" class="form-control">
<option value="">Select Student</option>
</select>
<!-- Submit -->
<button type="submit" name="issue_book">Issue Book</button>
</form>
Kindly help with this, I have no knowledge of JS or JQuery. I shall be very thankful.

first this is your html code
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>
<form action="" class="form-horizontal" method="POST">
<h4>Issue Book: </h4>
<hr>
<label class="control-label" for="class">Class</label>
<select id="class" name="class" class="form-control" onchange="getStudentOption(this)">
<option value="">Select Class</option>
<option value="class1">Class 1</option>
<option value="class2">Class 2</option>
<option value="class3">Class 3</option>
<option value="class4">Class 4</option>
</select>
<label class="control-label" for="student">Student</label>
<select id="student" name="student" class="form-control">
<option value="">Select Student</option>
</select>
<!-- Submit -->
<button type="submit" name="issue_book">Issue Book</button>
</form>
added a onchange function
<script>
function getStudentOption(input) {
var class_name = input.value;
$.ajax({
type: "GET",
data: 'class=' + class_name,
url: 'demo.php',
dataType: 'text',
success: function (text) {
$('#student').html(text);
},
});
}
</script>
here demo is the file name which file give you all student data so you can change this file name and path also
and this is your demo file content
<?php
if (isset($_GET) && ($_GET['class'] != '')) {
/*$class_value = $_GET['class'];
$query = "SELECT * FROM students WHERE class_name=" . $class_value;
$result = mysql_query($query);
$total_refs = mysql_num_rows($result);
if ($total_refs > 0) {
?>
<option value="">Select Student</option>
<?php
while ($line = mysql_fetch_array($result)) {
$student_name = $line['student_name'];
$student_id = $line['student_id'];
?>
<option
value="<?php echo $student_id; ?>"><?php echo $student_name; ?></option>
<?php
}
?>
<?php
} else { ?>
<option value="">Select Student</option>
<?php
}*/?>
<option value="">Select Student</option>
<option value="1">Student 1</option>
<option value="2">Student 2</option>
<option value="3">Student 3</option>
<?php }
?>
i have added some demo content you can update data which code i have added, i am not sure which your table structure so just update condition value and filed value

Javascript Download Item from Dropdown

Drop down, when item of dropdown is selected I need it to go to download page based on the advanced custom fields value.
Code:
<select name="download" onChange="download(this.value)">
<option value="0">Select template to download</option>
<option value="<?php the_field('download_template_1_link', 'option'); ?>"><?php the_field('download_template_1_title', 'option'); ?></option>
<option value="<?php the_field('download_template_2_link', 'option'); ?>"><?php the_field('download_template_2_title', 'option'); ?></option>
<option value="<?php the_field('download_template_3_link', 'option'); ?>"><?php the_field('download_template_3_title', 'option'); ?></option>
<option value="<?php the_field('download_template_4_link', 'option'); ?>"><?php the_field('download_template_4_title', 'option'); ?></option>
<option value="<?php the_field('download_template_5_link', 'option'); ?>"><?php the_field('download_template_5_title', 'option'); ?></option>
<script>
function download(val) {
window.location
}
</script>
</select>

use window.location.href to go to download page.
<script>
function download(val) {
window.location.href = val;
}
</script>

function download(url) {
if (url.length !== 0) {
window.location.href = url;
}
}
<select onChange="download(this.value)">
<option value="">-- Select --</option>
<option value="http://apple.com">Apple</option>
<option value="http://bing.com">Bing</option>
</select>

How to get selected value from combo box on form submit in php

The code to populate combo box from database
<td>Item Name:</td>
<td><select name="items">
<option value="0" selected="selected"> Choose</option>
<?php
while($row = mysql_fetch_assoc($query))
{
$category = $row["ItemName"];
echo "$category";
?>
<option value= <?php $category ?> > <?php echo $category ?> </option>
<?php
}?>
</select></td>
Code for submit
<td><input type="submit" name="newItem" value="New Item"/></td>
PHP code is:
<?php
if(isset($_POST['newItem']))
{
$item=$_POST['items'];
$sel=mysql_query("select ItemID from itemmaster where ItemName='$item'");
while($row2 = mysql_fetch_array($sel))
{
//code
}

Value should be inside quotes
change:
<option value= <?php $category ?> > <?php echo $category ?> </option>
to
<option value= "<?php $category ?> "> <?php echo $category ?> </option>

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