CodeIgniter 4 First Crud Example Tutorial

In this CodeIgniter 4 crud application example tutorial. Here, you will learn how to create crud applications in the CodeIgniter 4 framework and perform crud( insert update delete read operation) with MySQL database.

In this CodeIgniter 4 crud application example tutorial, we will use bootstrap 4 for creating users list and create, edit form in CodeIgniter 4 projects.

CodeIgniter 4 CRUD Application with Bootstrap

Follow the below steps and easily create a first crud application using CodeIgniter 4 framework with bootstrap 4:

  • Download Codeigniter Latest
  • Basic Configurations
  • Create Database With Table
  • Setup Database Credentials
  • Create Model and 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 users ( id int(11) NOT NULL AUTO_INCREMENT COMMENT 'Primary Key', name varchar(100) NOT NULL COMMENT 'Name', email varchar(255) NOT NULL COMMENT 'Email Address', contact_no varchar(50) NOT NULL COMMENT 'Contact No', created_at varchar(20) NOT NULL COMMENT 'Created date', PRIMARY KEY (id) ) ENGINE=InnoDB DEFAULT CHARSET=latin1 COMMENT='datatable demo table' AUTO_INCREMENT=1; INSERT INTO users(id, name, email, mobile_number, created_at) VALUES (1, 'Team', '[email protected]', '9000000001', '2019-01-01'), (2, 'Admin', '[email protected]', '9000000002', '2019-01-02'), (3, 'User', '[email protected]', '9000000003', '2019-01-03'), (4, 'Editor', '[email protected]', '9000000004', '2019-01-04'), (5, 'Writer', '[email protected]', '9000000005', '2019-01-05'), (6, 'Contact', '[email protected]', '9000000006', '2019-01-06'), (7, 'Manager', '[email protected]', '9000000007', '2019-01-07'), (8, 'John', '[email protected]', '9000000055', '2019-01-08'), (9, 'Merry', '[email protected]', '9000000088', '2019-01-09'), (10, 'Keliv', '[email protected]', '9000550088', '2019-01-10'), (11, 'Herry', '[email protected]', '9050550088', '2019-01-11'), (12, 'Mark', '[email protected]', '9050550998', '2019-01-12');

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 Model and Controller

So go to app/Models/ and create here one model. And you need to create one model name UserModel.php and update the following code into your UserModel.php file:

<?php namespace App\Models;
use CodeIgniter\Database\ConnectionInterface;
use CodeIgniter\Model; class UserModel extends Model
{ protected $table = 'users'; protected $allowedFields = ['name', 'email'];
}

Create Controller

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

  • Index() – This is used to display users’ list.
  • create() – This method is used to display create form.
  • store() – This is method is used to insert into the MySQL database.
  • update() – This is used to validate the form data server-side and update it into the MySQL database.
  • edit() – This method is used to display a single user.
  • delete() – This method is used to delete data from MySQL database.
<?php namespace App\Controllers; use CodeIgniter\Controller;
use App\Models\UserModel; class Users extends Controller
{ public function index() { $model = new UserModel(); $data['users'] = $model->orderBy('id', 'DESC')->findAll(); return view('users', $data); } public function create() { return view('create-user'); } public function store() { helper(['form', 'url']); $model = new UserModel(); $data = [ 'name' => $this->request->getVar('name'), 'email' => $this->request->getVar('email'), ]; $save = $model->insert($data); return redirect()->to( base_url('public/index.php/users') ); } public function edit($id = null) { $model = new UserModel(); $data['user'] = $model->where('id', $id)->first(); return view('public/index.php/edit-user', $data); } public function update() { helper(['form', 'url']); $model = new UserModel(); $id = $this->request->getVar('id'); $data = [ 'name' => $this->request->getVar('name'), 'email' => $this->request->getVar('email'), ]; $save = $model->update($id,$data); return redirect()->to( base_url('public/index.php/users') ); } public function delete($id = null) { $model = new UserModel(); $data['user'] = $model->where('id', $id)->delete(); return redirect()->to( base_url('public/index.php/users') ); }
}

Step 6: Create Views

Now we need to create some views file.

The views file name following:

  • users.php
  • create-user.php
  • edit-user.php

Create users.php file inside views folder and update the following code into your file:

<!doctype html>
<html lang="en"> <head> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no"> <title>Codeigniter 4 users List Example - Tutsmake.com</title> <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css">
</head>
<body> <div class="container mt-5"> <a href="<?php echo site_url('public/index.php/users/create') ?>" class="btn btn-success mb-2">Create</a> <?php if(isset($_SESSION['msg'])){ echo $_SESSION['msg']; } ?> <div class="row mt-3"> <table class="table table-bordered" id="users"> <thead> <tr> <th>Id</th> <th>Name</th> <th>Email</th> <th>Action</th> </tr> </thead> <tbody> <?php if($users): ?> <?php foreach($users as $user): ?> <tr> <td><?php echo $user['id']; ?></td> <td><?php echo $user['name']; ?></td> <td><?php echo $user['email']; ?></td> <td> <a href="<?php echo base_url('public/index.php/users/edit/'.$user['id']);?>" class="btn btn-success">Edit</a> <a href="<?php echo base_url('public/index.php/users/delete/'.$user['id']);?>" class="btn btn-danger">Delete</a> </td> </tr> <?php endforeach; ?> <?php endif; ?> </tbody> </table> </div>
</div> <script src="https://code.jquery.com/jquery-3.4.1.min.js"></script> <link rel="stylesheet" type="text/css" href="https://cdn.datatables.net/1.10.20/css/jquery.dataTables.min.css"> <script src="https://cdn.datatables.net/1.10.20/js/jquery.dataTables.min.js" type="text/javascript"></script> <script> $(document).ready( function () { $('#users').DataTable(); } );
</script>
</body>
</html>

Create create-user.php file inside views folder and update the following code into your file:

<!DOCTYPE html>
<html>
<head>
<title>Codeigniter 4 User Form With Validation Example</title>
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css">
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.js"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery-validate/1.19.0/jquery.validate.js"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery-validate/1.19.0/additional-methods.min.js"></script>
</head>
<body>
<div class="container">
<br>
<?= \Config\Services::validation()->listErrors(); ?>
<span class="d-none alert alert-success mb-3" id="res_message"></span>
<div class="row">
<div class="col-md-9">
<form action="<?php echo base_url('public/index.php/users/store');?>" name="user_create" id="user_create" method="post" accept-charset="utf-8">
<div class="form-group">
<label for="formGroupExampleInput">Name</label>
<input type="text" name="name" class="form-control" id="formGroupExampleInput" placeholder="Please enter name">
</div> <div class="form-group">
<label for="email">Email Id</label>
<input type="text" name="email" class="form-control" id="email" placeholder="Please enter email id">
</div> <div class="form-group">
<button type="submit" id="send_form" class="btn btn-success">Submit</button>
</div>
</form>
</div>
</div>
</div>
<script>
if ($("#user_create").length > 0) {
$("#user_create").validate({
rules: {
name: {
required: true,
},
email: {
required: true,
maxlength: 50,
email: true,
}, },
messages: {
name: {
required: "Please enter name",
},
email: {
required: "Please enter valid email",
email: "Please enter valid email",
maxlength: "The email name should less than or equal to 50 characters",
}, },
})
}
</script>
</body>
</html>

Create edit-user.php file inside views folder and update the following code into your file:

<!DOCTYPE html>
<html>
<head>
<title>Codeigniter 4 Edit User Form With Validation Example</title>
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css">
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.js"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery-validate/1.19.0/jquery.validate.js"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery-validate/1.19.0/additional-methods.min.js"></script>
</head>
<body>
<div class="container">
<br>
<?= \Config\Services::validation()->listErrors(); ?>
<span class="d-none alert alert-success mb-3" id="res_message"></span>
<div class="row">
<div class="col-md-9">
<form action="<?php echo base_url('public/index.php/users/update');?>" name="edit-user" id="edit-user" method="post" accept-charset="utf-8">
<input type="hidden" name="id" class="form-control" id="id" value="<?php echo $user['id'] ?>">
<div class="form-group">
<label for="formGroupExampleInput">Name</label>
<input type="text" name="name" class="form-control" id="formGroupExampleInput" placeholder="Please enter name" value="<?php echo $user['name'] ?>">
</div> <div class="form-group">
<label for="email">Email Id</label>
<input type="text" name="email" class="form-control" id="email" placeholder="Please enter email id" value="<?php echo $user['email'] ?>">
</div> <div class="form-group">
<button type="submit" id="send_form" class="btn btn-success">Submit</button>
</div>
</form>
</div>
</div>
</div>
<script>
if ($("#edit-user").length > 0) {
$("#edit-user").validate({
rules: {
name: {
required: true,
},
email: {
required: true,
maxlength: 50,
email: true,
}, },
messages: {
name: {
required: "Please enter name",
},
email: {
required: "Please enter valid email",
email: "Please enter valid email",
maxlength: "The email name should less than or equal to 50 characters",
}, },
})
}
</script>
</body>
</html>

Step 7: Start Development server

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

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

Conclusion

In this Codeigniter 4 crud operation example tutorial, We have successfully created a crud application with bootstrap 4 in CodeIgniter 4 application.

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