keeping selected value in the dropdown after reloading the page in php - php

I have a dropdown in my form, In which data is being fetch from database, Problem is i want to keep the selected value in the dropdown if page reloads. Any help will be really appreciated.
Here is my code
<select name="ans_type" class="select-form " onChange="checkAnswer(this.value)" style="background-color: #fff !important;width:159px!important;">
<option value="" style="color:#000">Select</option>
<?php
$sql = "select * from (table name)";
$res = mysqli_query($dbhandle,$sql);
$numrows = mysqli_num_rows($res);
if($numrows){
while($obj = mysqli_fetch_object($res)){
if($ansTypeId == $obj->id){
echo '<option value="'.$obj->id.'" style="color:#000" selected>'.($obj->ans_type).'</option>';
}
else{
echo '<option value="'.$obj->id.'" style="color:#000">'.($obj->ans_type).'</option>';
}
}
}
?>
</select>


Try below code.
<select name="ans_type" class="select-form " onChange="checkAnswer(this.value)" style="background-color: #fff !important;width:159px!important;">
<option value="" style="color:#000">Select</option>
<?php
$selectStr = '';
$sql = "select * from (table name)";
$res = mysqli_query($dbhandle,$sql);
$numrows = mysqli_num_rows($res);
if($numrows){
while($obj = mysqli_fetch_object($res)){
$selectStr = ($ansTypeId == $obj->id) ? 'selected' : '';
echo '<option value="'.$obj->id.'" style="color:#000" '.$selectStr.'>'.($obj->ans_type).'</option>';
}
}
?>
</select>


Try this
selected = '';
if($ansTypeId == $obj->id){
$selected = "selected='selected'";
}
echo '<option value="'.$obj->id.'" style="color:#000" $selected>'.
($obj->ans_type).'</option>';

Related

Option selected using ajax and php

I have some dropdown select as below
<div class="dep" style="display: inline;">
<select name="dep" id="dep" class="drp" style="width:19%;">
<option value="">Choose departament</option>
<?php
if($rowCount > 0){
while($row = $query->fetch_assoc()){
$selected = "";
if(isset($_POST['dep'])){
if ($_POST['dep'] == $row['D_id']) {
$selected = "selected='selected'";
}
}
echo '<option value="'.$row["D_id"].'" '.$selected.' >'.$row['Emri'].'</option>';
}
}else{
echo '<option value="">No Departaments</option>';
}
?>
</select>
</div>
The below dropdown filled when i select department using ajax
<div class="dega" style="display: inline;">
<select name="dega" id="dega" class="drp" style="width:19%;">
<option value="">Choose Sector </option>
</select>
</div>
to be filled need the follows :
ajax:
<script type="text/javascript">
$(document).ready(function(){
$('#dep').on('change',function(){
var dep_id = $(this).val();
if(dep_id){
$.ajax({
type:'POST',
url:'ajaxData.php',
data:'D_id='+dep_id,
success:function(html){
$('#dega').html(html);
}
});
}else{
$('#dega').html('<option value="">choose departament</option>');
}
});
});
And the ajaxData.php file where the ajax code take the values
include('dbConfig.php');
if(isset($_POST["D_id"]) && !empty($_POST["D_id"])){
$query = $db->query("SELECT * FROM deget WHERE D_id = ".$_POST['D_id']."");
$rowCount = $query->num_rows;
if($rowCount > 0){
echo '<option value="">Choose sector</option>';
while($row = $query->fetch_assoc()){
$sel = "";
if (isset($_POST['dega'])) {
if ($_POST['dega'] == $row['Dg_id']) {
$sel = "selected='selected'";
}
}
echo '<option value="'.$row['Dg_id'].'" '.$sel.'>'.$row['Emri'].'</option>';
}
}else{
echo '<option value="">No sectors revalent to department</option>';
}
}
Everything works fine except something.When i post the button all my dropdown are selected because i use selected='selected' EXCEPT the second dropdown choose sector and that because i have used ajax.I have tried on php file that took with ajax to make the option selected but it does not works.Any idea?

i find my problem and the solution is :
<div class="dega" style="display: inline;">
<select name="dega" id="dega" class="drp" style="width:19%;">
<?php if(isset($_POST['kot'])){
//Include database configuration file
include('dbConfig.php');
//Merr te dhenat e degeve perkatese te departamentit te selektuar
$query = $db->query("SELECT * FROM deget WHERE D_id = ".$_POST['dep']."");
//Rreshtat e querit
$rowCount = $query->num_rows;
//Mbush dropdown e degeve
if($rowCount > 0){
echo '<option value="">Zgjidh Degen</option>';
while($row = $query->fetch_assoc()){
$sel = "";
if($_POST['dega'] == $row['Dg_id']){
$sel = "selected='selected'";
}
echo '<option value="'.$row['Dg_id'].'" '.$sel.'>'.$row['Emri'].'</option>';
}
}else{
echo '<option value="">Nuk ka dege perkatese</option>';
}
}else{?>
<option value="">Selekto Degen </option>
<?php }?>
</select>
</div>

PHP Query set combobox for another combobox

how to fix this syntax for this logic ?
i want to select my select option to select the another select option
<?php
$query_string = "SELECT * FROM products";
$query_string1 = "SELECT * FROM suppliers where ProductID = // firstSelectoption(value)";
$query_string2 = "SELECT * FROM categories";
$query = mysql_query($query_string);
$query1 = mysql_query($query_string1);
$query2 = mysql_query($query_string2);
?>
and in the body i make
<select name="first" id="first" onchange="childrenOnChange(this.value)">
<?php
while ($row = mysql_fetch_array($query)) {
echo '<option value=' . $row["ProductID"] . '>';
echo $row['ProductID'];
echo '</option>';
}
?>
</select>
<select name="second" id="second">
<?php
while ($row = mysql_fetch_array($query1)) {
echo '<script>';
echo 'var arr = array(';
$row['SupplierID'] . ',';
echo ')';
echo '</script>';
}
?>
</select>
i want to set the second select option value with $query1;

If you get the value from the query with $val = mysql_fetch_array($query1), then you can include the following in your loop:
$selected = '';
if ($row['ProductID'] == $val) {
$selected = "selected";
}
echo '<option value="'.$row['ProductID'].'" '.$selected.'>'.$row['ProductID'].'</option>';

setting session value in dropdown in php

I am new to php i have set a value in a session variable in 1 page , Now i have to display that session variable value on another page's dropdown as selected, Tried everything but couldn't get it, May be because of bad coding :) , Any help from anyone would be really appreciated. Thanks.
here is my code
Select
if($numrows){
while($obj = mysqli_fetch_object($res)){
if($obj->status == 1){
if($subjectId == $obj->id){
echo '<option value="'.obj->id.'" style="color:#000" selected >'.$obj->subject_name.'</option>';
}
else{
echo '<option value="'.$obj->id.'" style="color:#000">'.($obj->subject_name).'</option>';
}
}
}
}
?>
</select>

You need to get the session variable first.
<?php
session_start();
$subjectId = ! empty($_SESSION['YOUR_SESSION_VARIABLE']) ? $_SESSION['YOUR_SESSION_VARIABLE'] : '';
?>
<select name="subject_id" class="select-form subjectSelect sub" onchange="ajaxDrp(this.value)" style="background-color: #fff !important; width:159px!important;">
<option value="" style="color:#000">Select</option>
<?php
$sql = "select * from mock_subject ";
$res = mysqli_query($dbhandle,$sql);
$numrows =mysqli_num_rows($res);
echo mysql_error();
if($numrows){
while($obj = mysqli_fetch_object($res)){
if($obj->status == 1){
$selected = ($subjectId == $obj->id) ? 'selected="selected"' : '';
echo '<option value="'.$selected.'" style="color:#000" $selected>'.$selected->subject_name.'</option>';
}
}
}
?>

PHP/JS: Dynamic Dropboxes and echoing SELECTED value

I am currently working with a dynamic dropdown menu(dependable select boxes). I am pulling the values straight from MySQL DB(if your curious here is how i have the DB SETUP). I am able to get the values of each table and display them accordingly. The problem I am having is echoing the SELECTED value of each selct box. I have a created JS function that will request postfile.php which will then echo the SELECTED value of each box. I am not getting anything echoed. I have checked with firebug but nothing is being posted.
How can I make this work? or Am I approaching this wrong? or Is there a better way? EXAMPLE
Working HTML/PHP
<?php
include ('includes/dbConnect.php');
try {
$pdo = get_database_connection();
$sql = "SELECT *
FROM `categories`
WHERE `master_id` = 0";
$statement = $pdo->query($sql);
$list = $statement->fetchAll(PDO::FETCH_ASSOC);
} catch(PDOException $e) {
echo 'There was a problem';
}
?>
<select name="main" id="main" size="7" class="update">
<option value="">Select one</option>
<?php if (!empty($list)) { ?>
<?php foreach($list as $row) { ?>
<option value="<?php echo $row['id']; ?>">
<?php echo $row['name']; ?>
</option>
<?php } ?>
<?php } ?>
</select>
<select name="subc1" id="subc1" size="7" class="update" disabled="disabled" hidden="hidden">
<option value="">----</option>
</select>
<select name="subc2" id="subc2" size="7" class="update" disabled="disabled" hidden="hidden">
<option value="">----</option>
</select>
<select name="subc3" id="subc3" size="7" class="update" disabled="disabled" hidden="hidden">
<option value="">----</option>
</select>
JS
<script type="text/javascript">
$(document).ready(function () {
$('#main).change(function() {
if ($(this).val()!='
') {
$("#subc1").load("postfile.php",{main_id: $(this).val()});
//$("#subc1").removeAttr('
disabled hidden ');
}
});
//code on change of sel_source
$('#subc1 ').change(function() {
if ($(this).val()!='
') {
$("#subc2").load("postfile.php",{subc1_id: $(this).val()});
//$("#colour").removeAttr('
disabled ');
}
});
$('#subc2 ').change(function() {
if ($(this).val()!='
') {
$("#subc3").load("postfile.php",{subc2_id: $(this).val()});
//$("#colour").removeAttr('
disabled ');
}
});
});
</script>
PHP- postfile.php
if(isset($_REQUEST['main_id']) && !empty($_REQUEST['main_id'])) {
try {
include ('../includes/dbConnect.php');
$pdo = get_database_connection();
$sql = ("select * from `categories` where id='".$_REQUEST['main_id']."' ");
$result = $con->prepare($sql);
$result->execute();
$number_of_rows = $result->fetchColumn();
}catch(PDOException $e) {
echo 'There was a problem';
}
if($number_of_rows > 0) {
$output = '<option value="">Select</option>';
while($row = mysql_fetch_assoc($result)) {
$output .= '<option value="'.$row['id'].'">'.$row['name'].'</option>';
}
} else {
$output = '<option value="">Select</option>';
}
echo $output;
}
if(isset($_REQUEST['subc1_id']) && !empty($_REQUEST['subc1_id'])) {
$result = mysql_query("select * from table where id='".$_REQUEST['subc1_id']."' ");
if($number_of_rows > 0) {
$output = '<option value="">Select</option>';
while($row = mysql_fetch_assoc($result)) {
$output .= '<option value="'.$row['id'].'">'.$row['name'].'</option>';
}
} else {
$output = '<option value="">Select</option>';
}
echo $output;
}
if(isset($_REQUEST['subc2_id']) && !empty($_REQUEST['subc2_id'])) {
$result = mysql_query("select * from table where id='".$_REQUEST['subc2_id']."' ");
if($number_of_rows > 0) {
$output = '<option value="">Select</option>';
while($row = mysql_fetch_assoc($result)) {
$output .= '<option value="'.$row['id'].'">'.$row['name'].'</option>';
}
} else {
$output = '<option value="">Select</option>';
}
echo $output;
}

Maybe you would like to use jQuery UI auto-complete. It is easier to use and less code. It has a remote data source also. Try this one, maybe this can solve your problem. http://jqueryui.com/demos/autocomplete/

Add on submit action to the form. In the function use the following:
var Myvar = $('#subc3 :selected').text();

keep the selected value for dropdown after submit

How do I keep the selected item after I submit the page? I have the country dropdown list with the following code.
<?php
$SQL = "SELECT countr_id, country_name FROM countries";
$Result = mysql_query($SQL) or die(mysql_error());
?>
<select name="country" style="width:400px"> <option value='-1'></option>
<?php
while($row = mysql_fetch_array($Result))
{
echo "<option value=\"".$row["country_id"]."\">".$row["country_name"]."</option>";
}
?>

<?php
$SQL = "SELECT countr_id, country_name FROM countries";
$Result = mysql_query($SQL) or die(mysql_error());
?>
<select name="country" style="width:400px"> <option value='-1'></option>
<?php
while($row = mysql_fetch_array($Result))
{
echo "<option value=\"".$row["country_id"]."\"";
if($_POST['country'] == $row['country_id'])
echo 'selected';
echo ">".$row["country_name"]."</option>";
}
?>

<?php
while($row = mysql_fetch_array($Result))
{
if ($_POST['country'] == $row["country_id"]) {
echo "<option value=\"".$row["country_id"]."\" selected="selected">".$row["country_name"]."</option>";
} else {
echo "<option value=\"".$row["country_id"]."\">".$row["country_name"]."</option>";
}
}
?>

<?php
$SQL = "SELECT countr_id, country_name FROM countries";
$Result = mysql_query($SQL) or die(mysql_error());
?>
<select name="country" style="width:400px"> <option value='-1'></option>
<?php
while($row = mysql_fetch_array($Result))
{
echo "<option ";
if($_REQUEST['country'] == $row["country_id"]) echo 'selected="selected" ';
echo "value=\"".$row["country_id"]."\">".$row["country_name"]."</option>";
}
?>

This code depends if you are trying to keep the value after you submit back to the original page.
<?php
$SQL = "SELECT countr_id, country_name FROM countries";
$Result = mysql_query($SQL) or die(mysql_error());
?>
<select name="country" style="width:400px">
<option value='-1'></option>
<?php
while($row = mysql_fetch_array($Result))
{
echo "<option ";
if($_REQUEST["yourSelectName"] ==$row["country_id"])
echo ' selected = "selected" ';
echo " value=\"".$row["country_id"]."\">".$row["country_name"]."</option>";
}
?>
</select>

Or you can do it all inline... less code, doesn't require all the if/then/else stuff
Change
echo "<option value=\"".$row["country_id"]."\">".$row["country_name"]."</option>";
To
echo "<option ". (($_POST['country'] == $row["country_id"]) ? 'selected ' : '') ."value=\"".$row["country_id"]."\">".$row["country_name"]."</option>";
If it is get (passed in URL), the use GET

<?php
$selectedid = 5; //example of selected if before submitting
$SQL = "SELECT countr_id, country_name FROM countries";
$Result = mysql_query($SQL) or die(mysql_error());
?>
<select name="country" style="width:400px"> <option value='-1'></option>
<?php
while($row = mysql_fetch_array($Result))
{
echo "<option value=\"".$row["country_id"]." ".(($selected==$row["country_id"])?"SELECTED":"")."\">".$row["country_name"]."</option>";
}
?>

//assume you have $result = array(your result list);
<select name='question'>
<?php
foreach ($result as $question) {
if ($_POST['question'] == $question) {
$selected = "selected";
} else {
$selected = '';
}
echo "<option value='" . $question . "' $selected>$question</option>";
}
?>
</select>

Categories