Skip to main content

How to display select options depend on another select in php?

In a database I have a table 'courses' and each course has number of sections(1,2,3,...) all stored in table 'sections'.

I want to make a form where the user selects a course from the available courses, then displays another selection input with the course's sections to choose from.

Here's what I've done, it worked but when I click 'next' after selecting the course and the section selection shows up, the name of the course selected will not show up. Does anyone know an easier way to do this using PHP or javascript? Can you show me how please.

<form id="form2" action="<?php echo htmlspecialchars($_SERVER['PHP_SELF']); ?>" method="post" onsubmit="return checkData();">

<label for="ccode">Select Course:</label>
<select name='ccode' required>
<option selected="true" disabled="disabled" value="">Select</option>";
<?php
foreach ($courses as $c) 
{
echo "<option >".$c."</option>";
} ?>
</select><br>

        

<?php 
extract($_POST);
if(isset($_POST['next']))
    {
        if(isset($ccode))
        {

            echo"<label for='upsection'>Select section:</label>
            <select name='upsection' id='upsection' required>
                <option selected='true' disabled='disabled' value=''>Select</option>";
                
                    foreach ($sec as $s) 
                    {
                        echo "<option >".$s."</option>";
                    }
            echo "</select><br>";
        }
        else
        {
            echo "<script>alert('Please select a course!');</script>";
        }
        if(isset($_POST['upsection']))
        {
            header('location: updatesection.php');
        }
    }?>
    <button name='next' id='next' >Next</button><br>
            </form>

I'm not good at explaining things but I hope you understand, and can help me with this:)

Via Active questions tagged javascript - Stack Overflow https://ift.tt/XzfpWjk
Labels:

Comments

Post a Comment

Popular posts from this blog

Why is my reports service not connecting?

I am trying to pull some data from a Postgres database using Node.js and node-postures but I can't figure out why my service isn't connecting. my routes/index.js file: const express = require('express'); const router = express.Router(); const ordersCountController = require('../controllers/ordersCountController'); const ordersController = require('../controllers/ordersController'); const weeklyReportsController = require('../controllers/weeklyReportsController'); router.get('/orders_count', ordersCountController); router.get('/orders', ordersController); router.get('/weekly_reports', weeklyReportsController); module.exports = router; My controllers/weeklyReportsController.js file: const weeklyReportsService = require('../services/weeklyReportsService'); const weeklyReportsController = async (req, res) => { try { const data = await weeklyReportsService; res.json({data}) console...
Post a Comment
Read more

How to show number of registered users in Laravel based on usertype?

i'm trying to display data from the database in the admin dashboard i used this: <?php use Illuminate\Support\Facades\DB; $users = DB::table('users')->count(); echo $users; ?> and i have successfully get the correct data from the database but what if i want to display a specific data for example in this user table there is "usertype" that specify if the user is normal user or admin i want to user the same code above but to display a specific usertype i tried this: <?php use Illuminate\Support\Facades\DB; $users = DB::table('users')->count()->WHERE usertype =admin; echo $users; ?> but it didn't work, what am i doing wrong? source https://stackoverflow.com/questions/68199726/how-to-show-number-of-registered-users-in-laravel-based-on-usertype
Post a Comment
Read more

The number of nodes and edges I calculated manually and by a method provided by networkx library dont match

I am trying to analyse a graph using networkx library in Python. I have implemented a function that returns the nodes and edges of that graph. After that I counted the number of nodes and edges by implementing the len() function for nodes and edges, which gave me 17 for both nodes and edges. However, when I used the method graph.number_of_nodes() of networkx library it gave me 53. My code: import pandas as pd import networkx as nx import matplotlib.pyplot as plt header_list = ["a","b","w"] E =pd.read_csv("aves-barn-swallow-contact-network.edges",sep=" ",header= None,names=header_list) # print(E.head()) # prints first few rows of the csv file G = nx.from_pandas_edgelist(E,"a","b",["w"]) nx.draw(G) plt.show() class GraphAnalyse: #finding nodes and edges def nodeEdge(self,Graph): nodes = Graph.nodes() edges = Graph.edges() ...
Post a Comment
Read more