CodeIgniter 4 Crud Example Tutorial

Teams applying “CodeIgniter 4 Crud Example Tutorial” in a production project can use employee performance logs to record implementation, review and debugging time, then compare that effort with tests and shipped functionality instead of treating activity as performance by itself.

Before copying the example into a live application, confirm version-specific behaviour with CodeIgniter and test it against the project’s actual database and runtime.

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', '[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'];
}