CodeIgniter 4 jQuery Form Validation Example

Jquery , Codeigniter

Nicesnippets

1206

08-08-2020


CodeIgniter 4 jQuery Form Validation Example

Hi Guys,

In this example,I will explain jQuery Form Validation in CodeIgniter 4. I will show example of codeigniter 4 jquery form validation. you can easyliy use jQuery Form Validation in codeigniter 4.you will learn how to create bootstrap forms and validate form data on client-side by using jQuery library. And also validate form data on the server-side by using the validation library of CodeIgniter 4.

In this CodeIgniter 4 jQuery validation on Bootstrap form example, we will use the jQuery form validation library that validates form data on client browser.

Here, I will give you full example for simply jQuery Form Validation in codeigniter 4 as bellow.

Step 1: Download Codeigniter Project


In this step, we will download the latest version of Codeigniter 4, Go to this link https://codeigniter.com/download Download Codeigniter 4 fresh new setup and unzip the setup in your local system xampp/htdocs/ . And change the download folder name “demo”

Step 2: Basic Configurations

Next, we will set some basic configuration on the app/config/app.php file, so let’s go to application/config/config.php and open this file on text editor.

Set Base URL like this

public $baseURL = 'http://localhost:8080';

To

public $baseURL = 'http://localhost/demo/';

Step 3: Create Database With Table

In this step, we need to create a database name demo, so let’s open your PHPMyAdmin and create the database with the name demo. After successfully create a database, you can use the below SQL query for creating a table in your database.

CREATE TABLE contacts (

id int(11) NOT NULL AUTO_INCREMENT COMMENT 'Primary Key',

name varchar(100) NOT NULL COMMENT 'Name',

email varchar(255) NOT NULL COMMENT 'Email Address',

message varchar(250) NOT NULL COMMENT 'Message',

created_at varchar(20) NOT NULL COMMENT 'Created date',

PRIMARY KEY (id)

) ENGINE=InnoDB DEFAULT CHARSET=latin1 COMMENT='demo table' AUTO_INCREMENT=1;

Step 4: Setup Database Credentials

In this step, we need to connect our project to the database. we need to go app/Config/Database.php and open database.php file in text editor. After opening the file in a text editor, We need to set up database credentials in this file like below.

public $default = [

'DSN' => '',

'hostname' => 'localhost',

'username' => 'root',

'password' => '',

'database' => 'demo',

'DBDriver' => 'MySQLi',

'DBPrefix' => '',

'pConnect' => false,

'DBDebug' => (ENVIRONMENT !== 'production'),

'cacheOn' => false,

'cacheDir' => '',

'charset' => 'utf8',

'DBCollat' => 'utf8_general_ci',

'swapPre' => '',

'encrypt' => false,

'compress' => false,

'strictOn' => false,

'failover' => [],

'port' => 3306,

];

Step 5: Create Model and Controller

So go to app/Models/ and create here one model. And you need to create one model name contactModel.php and update the following code into your contactModel.php file:

<?php namespace App\Models;

use CodeIgniter\Database\ConnectionInterface;

use CodeIgniter\Model;

class ContactModel extends Model

{

protected $table = 'contacts';

protected $allowedFields = ['name', 'email', 'message'];

}

Create Controller

Now Go to app/Controllers and create a controller name Contact.php. In this controller, we will create some method/function. We will build some of the methods like :

->Index() – This is used to display contact us form.

->create() – This is used to validate form data server-side and store into mysql database.

use CodeIgniter\Controller;

use App\Models\ContactModel;

class Contact extends Controller

{

public function index()

{

return view('contact');

}

public function create()

{

helper(['form', 'url']);

$val = $this->validate([

'name' => 'required',

'email' => 'required',

'message' => 'required',

]);

$model = new ContactModel();

if (!$val)

{

echo view('contact', [

'validation' => $this->validator

]);

}

else

{

$model->save([

'name' => $this->request->getVar('name'),

'email' => $this->request->getVar('email'),

'message' => $this->request->getVar('message'),

]);

echo view('success');

}

}

}

Step 6: Create Views

Now we need to create contact.php, go to application/views/ folder and create contact.php file. and update the following HTML into your files:

<!DOCTYPE html>

<html>

<head>

<title>Codeigniter 4 Form Validation Example</title>

<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css">

<script src="//ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.js"></script>

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery-validate/1.19.0/jquery.validate.js"></script>

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery-validate/1.19.0/additional-methods.min.js"></script>

</head>

<body>

<div class="container">

<br>

<?= \Config\Services::validation()->listErrors(); ?>

<div class="row">

<div class="col-md-9">

<form action="<?php echo base_url('contact/create') ?>" name="contact" id="contact" method="post" accept-charset="utf-8">

<div class="form-group">

<label for="formGroupExampleInput">Name</label>

<input type="text" name="name" class="form-control" id="formGroupExampleInput" placeholder="Please enter name">

</div>

<div class="form-group">

<label for="email">Email Id</label>

<input type="text" name="email" class="form-control" id="email" placeholder="Please enter email id">

</div>

<div class="form-group">

<label for="message">Message</label>

<textarea name="message" class="form-control"></textarea>

</div>

<div class="form-group">

<button type="submit" id="send_form" class="btn btn-success">Submit</button>

</div>

</form>

</div>

</div>

</div>

<script>

if ($("#contact").length > 0) {

$("#contact").validate({

rules: {

name: {

required: true,

},

email: {

required: true,

maxlength: 50,

email: true,

},

message: {

required: true,

},

},

messages: {

name: {

required: "Please enter name",

},

email: {

required: "Please enter valid email",

email: "Please enter valid email",

maxlength: "The email name should less than or equal to 50 characters",

},

message: {

required: "Please enter message",

},

},

})

}

</script>

</body>

</html>

This below line display error messages on your web page:

listErrors(); ?>

You need to add jQuery validation library given below in contact form:

<script src="//ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.js"></script>

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery-validate/1.19.0/jquery.validate.js"></script>

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery-validate/1.19.0/additional-methods.min.js">%lt;/script>

When you include the jQuery validation library on contact us web page. After this, you will also have to write validation rules of jQuery on the contact page. Which are given below:

<script>

if ($("#contact").length > 0) {

$("#contact").validate({

rules: {

name: {

required: true,

},

email: {

required: true,

maxlength: 50,

email: true,

},

message: {

required: true,

},

},

messages: {

name: {

required: "Please enter name",

},

email: {

required: "Please enter valid email",

email: "Please enter valid email",

maxlength: "The email name should less than or equal to 50 characters",

},

message: {

required: "Please enter message",

},

},

})

}

</script>

Note:- And here jQuery validation rules and messages are written. You can also change these validation rules and error messages as per your requirements.

Now we need to create success.php file, so go to application/views/ and create success.php file. And put the below code here.

<!DOCTYPE html>

<html>

<head>

<title> Codeigniter 4 Form Success </title>

<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css">

</head>

<body>

<div class="container mt-5">

<h1 class="text-center"> Thank You for contact us</h1>

</div>

</body>

</html>

Step 7: Start Development server

For start development server, Go to the browser and hit below the URL.

http://localhost/demo/public/index.php/contact

It will help you...