Codeigniter 4 jQuery Image Upload with Preview Tutorial

Codeigniter 4 jQuery Image Upload with Preview Tutorial

To image upload with preview in ci 4; In this tutorial, you will learn how to upload images in Codeigniter 4 apps with preview using jquery.

If you’re looking image that CodeIgniter image upload with a preview, an image upload preview in CodeIgniter 4 with a database example, and save the uploaded image in the database by using CodeIgniter 4, Codeigniter 4 image preview before uploading using jquery demo. So this tutorial is very helpful for you.

Codeigniter 4 jQuery Image Upload with Preview Tutorial

Follow the below steps and easily upload files in folder and store into the database in CodeIgniter 4 projects with preview:

  • Step 1: Setup Codeigniter Project
  • Step 2: Basic Configurations
  • Step 3: Create Database With Table
  • Step 4: Setup Database Credentials
  • Step 5: Create Controller
  • Step 6: Create Views
  • Step 7: Start Development server

Step 1: Setup 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 set up and unzip the setup in your local system xampp/htdocs/ . And change the download folder name to “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 the text editor.

Set a 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 creating a database, you can use the below SQL query for creating a table in your database.

CREATE TABLE files (
    id int(11) NOT NULL AUTO_INCREMENT COMMENT 'Primary Key',
    name varchar(100) NOT NULL COMMENT 'Name',
    type varchar(255) NOT NULL COMMENT 'file type',
    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 the database.php file in a 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 Controller

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

  • Index() – This is used to display the file/image upload form.
  • Store() – This is used to validate form files/images on the server-side and store in MySQL database and folder.
<?php namespace App\Controllers;

use CodeIgniter\Controller;

class Form extends Controller
{
    public function index()
    {    
         return view('form');
    }
    
    public function store()
    {  

	    helper(['form', 'url']);
        
	 $db      = \Config\Database::connect();
         $builder = $db->table('file');

        $validated = $this->validate([
            'file' => [
                'uploaded[file]',
                'mime_in[file,image/jpg,image/jpeg,image/gif,image/png]',
                'max_size[file,4096]',
            ],
        ]);

        $msg = 'Please select a valid file';
 
        if ($validated) {
            $avatar = $this->request->getFile('file');
            $avatar->move(WRITEPATH . 'uploads');

          $data = [

            'name' =>  $avatar->getClientName(),
            'type'  => $avatar->getClientMimeType()
          ];

          $save = $builder->insert($data);
          $msg = 'File has been uploaded';
        }

       return redirect()->to( base_url('public/index.php/form') )->with('msg', $msg);

	}
}


Step 6: Create Views

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

<!DOCTYPE html>
<html>
<head>
  <title>Codeigniter 4 Image upload with preview example</title>
 <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css">
 <script src="https://code.jquery.com/jquery-3.4.1.js"></script> 

</head>
<body>
 <div class="container">
    <br>
    
    <?php if (session('msg')) : ?>
        <div class="alert alert-info alert-dismissible">
            <?= session('msg') ?>
            <button type="button" class="close" data-dismiss="alert"><span>×</span></button>
        </div>
    <?php endif ?>

    <div class="row">
      <div class="col-md-9">
        <form action="<?php echo base_url('form/store');?>" name="ajax_form" id="ajax_form" method="post" accept-charset="utf-8" enctype="multipart/form-data">
         <div class="row">
          <div class="form-group col-md-6">
            <label for="formGroupExampleInput">Name</label>
            <input type="file" name="file" class="form-control" id="file" onchange="readURL(this);" accept=".png, .jpg, .jpeg" />
          </div>           

          <div class="form-group col-md-6">
            <img id="blah" src="//www.tutsmake.com/wp-content/uploads/2019/01/no-image-tut.png" class="" width="200" height="150"/>
          </div> 
          
          <div class="form-group">
           <button type="submit" id="send_form" class="btn btn-success">Submit</button>
          </div>
         
        </form>
       </div>
      </div>

    </div>
 
</div>
<script>
  function readURL(input, id) {
    id = id || '#blah';
    if (input.files && input.files[0]) {
        var reader = new FileReader();

        reader.onload = function (e) {
            $(id)
                    .attr('src', e.target.result)
                    .width(200)
                    .height(150);
        };

        reader.readAsDataURL(input.files[0]);
    }
 }
</script> 
</body>
</html>

This below line display error messages on your web page:

   <?php if (session('msg')) : ?>
        <div class="alert alert-info alert-dismissible">
            <?= session('msg') ?>
            <button type="button" class="close" data-dismiss="alert"><span>×</span></button>
        </div>
    <?php endif ?>

The below script code show preview of your image on your web page:

<script>
  function readURL(input, id) {
    id = id || '#blah';
    if (input.files && input.files[0]) {
        var reader = new FileReader();

        reader.onload = function (e) {
            $(id)
                    .attr('src', e.target.result)
                    .width(200)
                    .height(150);
        };

        reader.readAsDataURL(input.files[0]);
    }
 }
</script> 

Step 7: Start Development server

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

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

Conclusion

In this Codeigniter 4 image upload with preview example tutorial. You have learned how to upload images in CodeIgniter 4 projects with preview and how to validate images on the server side in CodeIgniter 4 framework.

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AuthorAdmin

Greetings, I'm Devendra Dode, a full-stack developer, entrepreneur, and the proud owner of Tutsmake.com. My passion lies in crafting informative tutorials and offering valuable tips to assist fellow developers on their coding journey. Within my content, I cover a spectrum of technologies, including PHP, Python, JavaScript, jQuery, Laravel, Livewire, CodeIgniter, Node.js, Express.js, Vue.js, Angular.js, React.js, MySQL, MongoDB, REST APIs, Windows, XAMPP, Linux, Ubuntu, Amazon AWS, Composer, SEO, WordPress, SSL, and Bootstrap. Whether you're starting out or looking for advanced examples, I provide step-by-step guides and practical demonstrations to make your learning experience seamless. Let's explore the diverse realms of coding together.

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