SweetAlert2 jQuery Notification Plugin to CodeIgniter 4

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While doing any operation in any application we want some confirmation alerts like for success, warning, error. Why we need these?

It’s because it gives a more readable power to end users to understand what’s happening.

Inside this article we will implement or add sweetalert2 jquery notification plugin to CodeIgniter 4 application. This is not CodeIgniter 4 application specific. You can use in any application of PHP.

This article will cover about using SweetAlert2 jquery plugin for message notifications to end users. Generally notifications helps user to understand about the steps what they initiated, what’s happening, about next process, etc.

To learn about Growl jQuery Notification to CodeIgniter 4, Click here.

Learn More –

Step by step we will see their needed plugin files and implementation.

Let’s get started.

CodeIgniter 4 Installation

To create a CodeIgniter 4 setup run this given command into your shell or terminal. Please make sure composer should be installed.

composer create-project codeigniter4/appstarter codeigniter-4

Assuming you have successfully installed application into your local system.

Environment (.env) Setup

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

Either we can do via renaming file as simple as that. Also we can do by terminal command.

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.

Enable Development Mode

CodeIgniter starts up in production mode by default. You need to make it in development mode to see any error if you are working with application.

Open .env file from root.

# CI_ENVIRONMENT = production

 // Do it to 
CI_ENVIRONMENT = development

Now application is in development mode.

Required Plugin Files

SweetAlert2 jQuery plugin file

JS File


CSS File


We need a plugin JS file and a CSS file for its layout styling. After adding these plugin files, we are allowed to use it’s method like –


About complete documentation of Sweetalert 2 click here.

Implementing SweetAlert2 jQuery Plugin

Let’s create a simple application where we will see the step by step implementation of sweetalert2 jQuery plugin files.

Create Route

Routes can be configured into Routes.php which is at /app/Config folder.


$routes->get('notification', 'MessageController::showSweetAlertMessages');


Create Controller

$ php spark make:controller Message --suffix

Open MessageController.php from /app/Controllers


namespace App\Controllers;

use App\Controllers\BaseController;

class MessageController extends BaseController
	public function showSweetAlertMessages()
		// Flash messages settings

		session()->setFlashdata("success", "This is success message");

		session()->setFlashdata("warning", "This is warning message");

		session()->setFlashdata("info", "This is information message");

		session()->setFlashdata("error", "This is error message");

		return view("sweetalert-notification");

Create Blade Template File

Create a file with name sweetalert-notification.php at /app/Views folder. Open file and write this code into it.

<script src="https://code.jquery.com/jquery-3.5.1.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/sweetalert2@9.17.2/dist/sweetalert2.min.js"></script>
<link rel="stylesheet" type="text/css" href="https://cdn.jsdelivr.net/npm/sweetalert2@9.17.2/dist/sweetalert2.min.css">


    <?php if(session()->has("success")) { ?>
            icon: 'success',
            title: 'Great!',
            text: '<?= session("success") ?>'
    <?php } ?>

Above code is for success notification block only. If you need to display for Error, Warning and Information.

For Error Block


    <?php if(session()->has("error")) { ?>
            icon: 'error',
            title: 'Oops...',
            text: '<?= session("error") ?>'
    <?php } ?>

For Warning Block


    <?php if(session()->has("warning")) { ?>
            icon: 'warning',
            title: 'Great!',
            text: '<?= session("warning") ?>'
    <?php } ?>

For Information Block


    <?php if(session()->has("info")) { ?>
            icon: 'info',
            title: 'Hi!',
            text: '<?= session("info") ?>'
    <?php } ?>

Right now we are displaying these notification messages without any operations like insert, update or anything but you can use it for your application notifications.

Application Testing

Open project terminal and start development server via command:

php spark serve

URL – http://localhost:8080/notification





We hope this article helped you to learn about i.e SweetAlert2 jQuery Notification Plugin to CodeIgniter 4 Tutorial in a very detailed way.

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Sanjay KumarHello friends, I am Sanjay Kumar a Web Developer by profession. Additionally I'm also a Blogger, Youtuber by Passion. I founded Online Web Tutor and Skillshike platforms. By using these platforms I am sharing the valuable knowledge of Programming, Tips and Tricks, Programming Standards and more what I have with you all. Read more