CodeIgniter 4 Watermark Image Example

CodeIgniter 4 Watermark Image Example

Hello friends, Today we will show CodeIgniter 4 Watermark Image Example. In this example you will learn how to add text watermarking on the image in CodeIgniter 4 application.  We will explain step by step CodeIgniter 4 image watermarking tutorial.

Here we will explain how to add text watermarking on the image in CodeIgniter 4 application. Sometime we need to upload image similarly to create image watermarking functionality to add digital signature on the image using image manipulation class.

CodeIgniter 4 Image Text Watermark Example

Step 1: Install CodeIgniter Project

In this we will install CodeIgniter 4 project for Image Text Watermark. so let’s following line run in your terminal.

composer create-project codeigniter4/appstarter

Step 2 : Basic Configurations

In this step, you 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';
public $baseURL = 'http://localhost/demo/';

Step 3 : Create Database With Table

Now, you required to create database name demo, so open PHPMyAdmin and create the database with the name demo. After successfully create a database, you can use the following SQL query for creating a crop_images table in your database.

    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)

Step 4 : Setup Database Credentials

Now you required to connect our project to the database. So, visit app/Config/Database.php and open database.php file in text editor. After opening the file in a text editor, You required to set up database credentials in this file like following.

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, You go to app/Controllers and create a controller name ImageUploadController.php. Then add bellow code into it:

namespace App\Controllers; 
use CodeIgniter\Controller;
class ImageUploadController extends Controller {
   public function index() { 
      return view('imageUploadForm');
   public function upload() {
        helper(['form', 'url']); 
        // access database
        $database = \Config\Database::connect();
        $db = $database->table('files');
        // file validation
        $isValidFile = $this->validate([
            'file' => [
        // check validation
        if (!$isValidFile) {
            print_r('Upload valid file upto 4mb size');
        } else {
            $imgPath = $this->request->getFile('file');
            // Image manipulation
            $image = \Config\Services::image()
                ->text('Copyright @2021', [
                    'color'      => '#fff',
                    'opacity'    => 0.7,
                    'withShadow' => true,
                    'hAlign'     => 'center',
                    'vAlign'     => 'bottom',
                    'fontSize'   => 20
                ->save(FCPATH .'/images/'. $imgPath->getRandomName());
            $imgPath->move(WRITEPATH . 'uploads');
            $fileData = [
                'name' =>  $imgPath->getName(),
                'type'  => $imgPath->getClientMimeType()
            $store = $db->insert($fileData);
            print_r('File uploaded successfully.');
} ?>

Step 6 : Create Views

Now, you required to create imageUploadForm.php, Go to application/views/ folder and create imageUploadForm.php file. So let’s update the bellow HTML into your files:

<!DOCTYPE html>
    <title>Codeigniter 4 Watermark Image Example -</title>
    <link rel="stylesheet" href="">
    <div class="container mt-5" style="max-width: 500px">
       <h2 class="mb-4 text-center">Codeigniter 4 Watermark Image Example</h2>
        <form method='post' action='<?php echo base_url(); ?>/ImageUploadController/upload'
            <div class="form-group">
                <label for="formFileLg" class="form-label">Select image :</label>
                <input class="form-control form-control-lg" type="file" name="file">
            <div class="d-grid mt-3">
                <input type="submit" value="Upload" class="btn btn-outline-primary" />

Step 7 : Add Routes

Now, visit app/Config/ folder and open Routes.php file. Then define in the routes in this file, as shown following:

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

Step 8 : Start Development server

For start development server, open your terminal and execute the bellow command it:

php spark serve

Then, Go to the browser and hit following the URL:


I hope you understand of CodeIgniter 4 Watermark Image and it can help you…

Read Also :  CodeIgniter Insert Data into Database Example