CodeIgniter 4 FullCalendar Ajax CRUD Tutorial Example

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In most applications we need sometime a schedule calendar so that we can add our tasks, events, functions. Those scheduled tasks act like a reminder to the calendar. This feature is very interesting to implement if you are providing adding events to your clients, users, etc.

Inside this article we will see the complete concept of CodeIgniter 4 fullcalendar ajax crud tutorial. This article is super easy to learn and implement in your code as well.

FullCalendar is a jquery plugin by the help of which we can display a calendar to webpage. Even we can create events, appointments etc on a specific date, update existing data, delete data etc. All CRUD operations we can easily manage from it’s interface.

This is not CodeIgniter 4 specific feature, you can use it in any version of CodeIgniter.

Note*: For this article, CodeIgniter v4.1 setup has been installed. May be when you are seeing, version will be updated. CodeIgniter 4.x still is in development mode.

Let’s get started.

Download & Install CodeIgniter 4 Setup

We need to download & install CodeIgniter 4 application setup to system.

To set application we have multiple options to proceed.

Here are the following ways to download and install CodeIgniter 4 –

  • Manual Download
  • Composer Installation
  • Clone Github repository of CodeIgniter 4

Complete introduction of CodeIgniter 4 basics – Click here to go. After going through this article you can easily download & install setup.

Here is the command to install via composer –

$ composer create-project codeigniter4/appstarter codeigniter-4

Assuming you have successfully installed application into your local system.

Turn Development Mode On

When we install CodeIgniter 4, we have env file at root. To use the environment variables means using variables at global scope we need to do env to .env

Open project in terminal

$ cp env .env

Above command will create a copy of env file to .env file. Now we are ready to use environment variables.

CodeIgniter starts up in production mode by default. Let’s do it in development mode. So that while working if we get any error then error will show up.

# CI_ENVIRONMENT = production

 // Do it to 
CI_ENVIRONMENT = development

Now application is in development mode.

Create Database & Tables To Application

We need to create a database. For database we will use MySQL. We have 2 options available to create database. Either we can use PhpMyAdmin Manual interface Or we can use command to create.

CREATE DATABASE codeigniter4_app;

Successfully, we have created a database.

Next, we need to create a table inside database.

  id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
  title varchar(255) NOT NULL,
  start date NOT NULL,
  end date NOT NULL,

Database Connectivity to Application

Open .env file from project root. Search for DATABASE. You should see the connection environment variables.

Let’s set the value for those to connect with database.

 database.default.hostname = localhost
 database.default.database = codeigniter4_app
 database.default.username = root
 database.default.password = root
 database.default.DBDriver = MySQLi

Now, database successfully connected with application.

Create Model

We need very first a Model.

Open project into terminal and run this spark command.

$ php spark make:model Event --suffix

It will create a model i.e EventModel.php at /app/Models folder.

Open EventModel.php and write this complete code into it.


namespace App\Models;

use CodeIgniter\Model;

class EventModel extends Model
	protected $DBGroup              = 'default';
	protected $table                = 'events';
	protected $primaryKey           = 'id';
	protected $useAutoIncrement     = true;
	protected $insertID             = 0;
	protected $returnType           = 'array';
	protected $useSoftDelete        = false;
	protected $protectFields        = true;
	protected $allowedFields        = [

	// Dates
	protected $useTimestamps        = false;
	protected $dateFormat           = 'datetime';
	protected $createdField         = 'created_at';
	protected $updatedField         = 'updated_at';
	protected $deletedField         = 'deleted_at';

	// Validation
	protected $validationRules      = [];
	protected $validationMessages   = [];
	protected $skipValidation       = false;
	protected $cleanValidationRules = true;

	// Callbacks
	protected $allowCallbacks       = true;
	protected $beforeInsert         = [];
	protected $afterInsert          = [];
	protected $beforeUpdate         = [];
	protected $afterUpdate          = [];
	protected $beforeFind           = [];
	protected $afterFind            = [];
	protected $beforeDelete         = [];
	protected $afterDelete          = [];

Create Controller

We need now a controller file. Back to terminal and run this spark command to create.

$ php spark make:controller Fullcalendar --suffix

This will creates a file FullcalendarController.php at /app/Controllers folder.

Open FullcalendarController.php and write this complete code into it,


namespace App\Controllers;

use App\Controllers\BaseController;
use App\Models\EventModel;

class FullcalendarController extends BaseController
	public function __construct()
	public function index()
		return view('fullcalendar');

	public function loadData()
		$event = new EventModel();
		// on page load this ajax code block will be run
		$data = $event->where([
			'start >=' => $this->request->getVar('start'),
			'end <='=> $this->request->getVar('end')

		return json_encode($data);

	public function ajax()
		$event = new EventModel();

		switch ($this->request->getVar('type')) {

				// For add EventModel
			case 'add':
				$data = [
					'title' => $this->request->getVar('title'),
					'start' => $this->request->getVar('start'),
					'end' => $this->request->getVar('end'),
				return json_encode($event);

				// For update EventModel        
			case 'update':
				$data = [
					'title' => $this->request->getVar('title'),
					'start' => $this->request->getVar('start'),
					'end' => $this->request->getVar('end'),

				$event_id = $this->request->getVar('id');
				$event->update($event_id, $data);

				return json_encode($event);

				// For delete EventModel    
			case 'delete':

				$event_id = $this->request->getVar('id');


				return json_encode($event);


Create Layout File

Next, create a layout file with the name fullcalendar.php inside /app/Views folder.

Open fullcalendar.php and write this complete code into it.

<!DOCTYPE html>
    <title>CodeIgniter 4 Fullcalender Tutorial - Online Web Tutor</title>
    <link rel="stylesheet" href="" />
    <script src=""></script>

    <!--fullcalendar plugin files -->
    <link rel="stylesheet" href="" />
    <script src=""></script>
    <script src=""></script>
    <!-- for plugin notification -->
    <link rel="stylesheet" href="" />
    <script src=""></script>
<div class="container">
    <h3 style="text-align: center">CodeIgniter 4 Fullcalendar Tutorial - Online Web Tutor</h3>
    <div id="calendar"></div>
  var site_url = "<?= site_url() ?>";

<?= script_tag('script.js') ?>
  • script_tag(‘script.js’) Add script.js file from /public folder.
  • var site_url = “”; Declare site url to use it in script.js file.

Create Javascript File – to Handle Ajax request

Create a file script.js inside /public folder. This file will contain all ajax handling code.

Open script.js file and write this complete code into it.

$(document).ready(function() {

    var calendar = $('#calendar').fullCalendar({
        editable: true,
        events: site_url + "/event",
        displayEventTime: false,
        editable: true,
        eventRender: function(event, element, view) {
            if (event.allDay === 'true') {
                event.allDay = true;
            } else {
                event.allDay = false;
        selectable: true,
        selectHelper: true,
        select: function(start, end, allDay) {

            var title = prompt('Event Title:');

            if (title) {
                var start = $.fullCalendar.formatDate(start, "Y-MM-DD");
                var end = $.fullCalendar.formatDate(end, "Y-MM-DD");
                    url: site_url + "/eventAjax",
                    data: {
                        title: title,
                        start: start,
                        end: end,
                        type: 'add'
                    type: "POST",
                    success: function(data) {
                        displayMessage("Event Created Successfully");

                        calendar.fullCalendar('renderEvent', {
                            title: title,
                            start: start,
                            end: end,
                            allDay: allDay
                        }, true);


        eventDrop: function(event, delta) {
            var start = $.fullCalendar.formatDate(event.start, "Y-MM-DD");
            var end = $.fullCalendar.formatDate(event.end, "Y-MM-DD");

                url: site_url + '/eventAjax',
                data: {
                    title: event.title,
                    start: start,
                    end: end,
                    type: 'update'
                type: "POST",
                success: function(response) {

                    displayMessage("Event Updated Successfully");
        eventClick: function(event) {
            var deleteMsg = confirm("Do you really want to delete?");
            if (deleteMsg) {
                    type: "POST",
                    url: site_url + '/eventAjax',
                    data: {
                        type: 'delete'
                    success: function(response) {

                        displayMessage("Event Deleted Successfully");



function displayMessage(message) {
    toastr.success(message, 'Event');

Create Routes

Add these routes into Routes.php at /app/Config folder.

Open Routes.php,

$routes->get("fullcalendar", "FullcalendarController::index");
$routes->get("event", "FullcalendarController::loadData");
$routes->post("eventAjax", "FullcalendarController::ajax");

Application Testing

Start development server:

$ php spark serve

URL – http://localhost:8080/fullcalendar

Before adding any event by the fullcalendar.

Add Event

To add event, simply click on any specific date and add your event via javascript popup box. when you fill Event title and hit Ok button. By ajax it will save data into database table.

Update event

Simply drag and drop your events here and there inside calendar. It will update the event where you drop by ajax handler.

Delete Event

When you click on any event of calendar, it will open a javascript confirmation box, if Yes then it will delete that event by ajax handler.

Events inside database

We hope this article helped you to learn about CodeIgniter 4 FullCalendar Ajax CRUD Tutorial Example in a very detailed way.

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