CodeIgniter 4 Image Upload With Preview Example

CodeIgniter 4 Image Upload With Preview Example

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

CodeIgniter 4 image upload with preview example tutorial. Here, you will learn how to upload image in Codeigniter 4 projects with preview using jquery.

CodeIgniter 4 Image Upload With Preview Example

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

  • Download Codeigniter Latest
  • Basic Configurations
  • Create Database With Table
  • Setup Database Credentials
  • Create Controller
  • Create Views
  • Start Development server

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 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 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 Controller

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

  • Index() – This is used to display file/image upload form.
  • Store() – This is used to validate form file/image on server-side and store into 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 into 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 ?>

This 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

For start 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 image in CodeIgniter 4 projects with preview and how to validate image on server-side in CodeIgniter 4 framework.

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AuthorAdmin

My name is Devendra Dode. I am a full-stack developer, entrepreneur, and owner of Tutsmake.com. I like writing tutorials and tips that can help other developers. I share tutorials of 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 from a starting stage. As well as demo example.

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