CodeIgniter 4 Ajax Form Submit Validation Example

Codeigniter

Nicesnippets

34938

07-08-2020


Hi Guys,

In this example,I will learn you how to use ajax form submit validation in codeigniter 4.you can easy and simply use ajax form submit validation in codeigniter 4.

Here, CodeIgniter 4 tutorial, we will create a contact form and submit contact form using Ajax and validate the contact form before sending the form data to the server in CodeIgniter 4. And this contact form will send data to the server without refreshing the whole page and Also, the form will insert the data into the database in CodeIgniter 4 framework.

Step 1: Download Fresh Codeigniter 4


In First step we will download fresh version of Codeigniter 4, so if you haven't download yet then download from here : Download Codeigniter 4.

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.

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

So go to app/Models/ and create here one model. And you need to create one model name contactModel.

<?php namespace App\Models;

use CodeIgniter\Database\ConnectionInterface;

use CodeIgniter\Model;

class ContactModel extends Model

{

protected $table = 'contacts';

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

}

Step 6: 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 :

<?php namespace App\Controllers;

use CodeIgniter\Controller;

use App\Models\ContactModel;

class Contact extends Controller

{

public function index()

{

return view('contact');

}

public function create()

{

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

$db = \Config\Database::connect();

$builder = $db->table('contacts');

$data = [

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

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

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

];

$save = $builder->insert($data);

$data = [

'success' => true,

'data' => $save,

'msg' => "Thanks for contact us. We get back to you"

];

return $this->response->setJSON($data);

}

}

Step 7: 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 ajax insert form with validation</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(); ?>

<span class="d-none alert alert-success mb-3" id="res_message"></span>

<div class="row">

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

<form action="javascript:void(0)" name="ajax_form" id="ajax_form" 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 ($("#ajax_form").length > 0) {

$("#ajax_form").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",

},

},

submitHandler: function(form) {

$('#send_form').html('Sending..');

$.ajax({

url: "<?php echo base_url('contact/create') ?>",

type: "POST",

data: $('#ajax_form').serialize(),

dataType: "json",

success: function( response ) {

console.log(response);

console.log(response.success);

$('#send_form').html('Submit');

$('#res_message').html(response.msg);

$('#res_message').show();

$('#res_message').removeClass('d-none');

document.getElementById("ajax_form").reset();

setTimeout(function(){

$('#res_message').hide();

$('#res_message').html('');

},10000);

}

});

}

})

}

</script>

</body>

</html>

This below line display error messages on your web page:

<?= \Config\Services::validation()->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"></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. Also, you need to write ajax form submit code. Which are given below:

<script>

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

$("#ajax_form").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",

},

},

submitHandler: function(form) {

$('#send_form').html('Sending..');

$.ajax({

url: "<?php echo base_url('public/index.php/contact/create') ?>",

type: "POST",

data: $('#ajax_form').serialize(),

dataType: "json",

success: function( response ) {

console.log(response);

console.log(response.success);

$('#send_form').html('Submit');

$('#res_message').html(response.msg);

$('#res_message').show();

$('#res_message').removeClass('d-none');

document.getElementById("ajax_form").reset();

setTimeout(function(){

$('#res_message').hide();

$('#res_message').html('');

},10000);

}

});

}

})

}

</script>

Step 8: 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...


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