12-Aug-2020
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Admin
In this example ,I will explain 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.
Here, I will give you full example for simply first crud using codeigniter 4 as bellow.
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', 'info@test.com', '9000000001', '2019-01-01'),
(2, 'Admin', 'admin@test.com', '9000000002', '2019-01-02'),
(3, 'User', 'user@test.com', '9000000003', '2019-01-03'),
(4, 'Editor', 'editor@test.com', '9000000004', '2019-01-04'),
(5, 'Writer', 'writer@test.com', '9000000005', '2019-01-05'),
(6, 'Contact', 'contact@test.com', '9000000006', '2019-01-06'),
(7, 'Manager', 'manager@test.com', '9000000007', '2019-01-07'),
(8, 'John', 'john@test.com', '9000000055', '2019-01-08'),
(9, 'Merry', 'merry@test.com', '9000000088', '2019-01-09'),
(10, 'Keliv', 'kelvin@test.com', '9000550088', '2019-01-10'),
(11, 'Herry', 'herry@test.com', '9050550088', '2019-01-11'),
(12, 'Mark', 'mark@test.com', '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'];
}
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
It will help you..
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