How To File Upload In Codeigniter 4 Example Tutorial




How To File Upload In Codeigniter 4 Example Tutorial

Hi guys,

Today i will explained How To File Upload in Codeigniter 4 Example Tutorial. This example is so easy to use in Codeigniter 4.

CodeIgniter comes with a default File Uploading class, which makes your image and other documents easily upload on the server. To impetus the file uploading task, we will shed light on Codeigniter’s file upload library.

The assortment of this tutorial is in two primary parts backend and frontend. In the backend part, we take care of imperatives, such as creating a database connection, model, and routes etc.

So let's start to the example.

Step 1 : Set Up Codeigniter Application

Hit the below command to install the CodeIgniter 4 application, but you must have a composer package installed on your device.

composer create-project codeigniter4/appstarter

Rename the Codeigniter app name, such as codeigniter-file-upload.

Go inside the project folder.

cd codeigniter-file-upload

Step 2 : Enable Errors in CI

Enable error reporting to debug the error with gravitas in the Codeigniter application.

Open app/Config/Boot/development.php file and set the display_errors to 1 instead of 0. Do the same thing in app/Config/Boot/production.php file.

ini_set('display_errors', '1');

Step 3 : Formulate Database with Table

Go to PHPMyAdmin, execute the following SQL query to manifest a database with demo name, also create a users table within. Here we store the uploaded files or images.



name varchar(100) NOT NULL COMMENT 'Name',

type varchar(255) NOT NULL COMMENT 'File Type',



Step 4 : Database Connection

To establish the coherence between database and codeigniter you must define database name, username and password in application/config/database.php.

public $default = [

'DSN' => '',

'hostname' => 'localhost',

'username' => 'test',

'password' => '4Mu99BhzK8dr4vF1',

'database' => 'demo',

'DBDriver' => 'MySQLi',

'DBPrefix' => '',

'pConnect' => false,

'DBDebug' => (ENVIRONMENT !== 'development'),

'cacheOn' => false,

'cacheDir' => '',

'charset' => 'utf8',

'DBCollat' => 'utf8_general_ci',

'swapPre' => '',

'encrypt' => false,

'compress' => false,

'strictOn' => false,

'failover' => [],

'port' => 3306,



There are a high chance that you might get Unable to connect database : Codeigniter the error, especially if you are working with MAMP or XAMP servers. You can define either of the hostname for MAMP or XAMP.


public $default = [

'hostname' => '/Applications/XAMPP/xamppfiles/var/mysql/mysql.sock',



public $default = [

'hostname' => '/Applications/MAMP/tmp/mysql/mysql.sock',


Step 5 : Create Image Upload Controller

Create a FileUpload.php controller in app/Controllers directory. Then, place the below-mentioned code in it.


namespace App\Controllers;

use CodeIgniter\Controller;

class FileUpload extends Controller


public function index()


return view('home');


function upload()


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

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

$db = $database->table('users');

$input = $this->validate([

'file' => [






if (!$input) {

print_r('Choose a valid file');

} else {

$img = $this->request->getFile('file');

$img->move(WRITEPATH . 'uploads');

$data = [

'name' => $img->getName(),

'type' => $img->getClientMimeType()


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

print_r('File has successfully uploaded');




Step 6 : Create Routes

We have to create a route that loads the file uploading controller when the application starts. Open app/Config/Routes.php file and add the following code.

$routes->get('/', 'FileUpload::index');

Step 7 : Create View

Eventually, we require to create a file uploading HTML component using Bootstrap. So, create app/Views/home.php file and place the given below code in it.

<!doctype html>

<html lang="en">


<meta charset="utf-8">

<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">

<title>How To File Upload in Codeigniter 4 Example Tutorial -</title>

<link rel="stylesheet" href="">


.container {

max-width: 500px;





<div class="container mt-5">

<form method="post" action="<?php echo base_url('FileUpload/upload');?>" enctype="multipart/form-data">

<div class="form-group">


<input type="file" name="file" class="form-control">


<div class="form-group">

<button type="submit" class="btn btn-danger">Upload</button>






Step 8 : Start Application

Let us start the app, run the following command to start the application:

php spark serve

Enter the following URL in the browser to upload the image into the database in Codeigniter:


Now you can check your own.

I hope it can help you...

#Codeigniter 4