PHP Programming Tutorial 1 - php codeigniter4 configuration in xampp or wamp
PHP Programming Tutorial 2 - CodeIgniter 4 Application Structure
PHP Programming Tutorial 3 - What is MVC in Codeigniter 4
PHP Programming Tutorial 4 - Codeigniter 4 Environment Variables
PHP Programming Tutorial 5 - Controllers in CodeIgniter 4
PHP Programming Tutorial 6 - Views in CodeIgniter 4
PHP Programming Tutorial 7 - Models in CodeIgniter 4
PHP Programming Tutorial 8 - Remove index.php from URL in CodeIgniter 4
PHP Programming Tutorial 9 - Include header and footer in CodeIgniter 4
PHP Programming Tutorial 10 - Session in CodeIgniter 4
PHP Programming Tutorial 11 - URI Routing in CodeIgniter 4
PHP Programming Tutorial 12 - Highlight Menu using URI Segment in CodeIgniter 4
PHP Programming Tutorial 13 - Connect to Database in CodeIgniter 4
PHP Programming Tutorial 14 - Insert data in Database using CodeIgniter 4
PHP Programming Tutorial 15 - Retrieve data from Database using CodeIgniter 4
PHP Programming Tutorial 16 - Update data in Database using CodeIgniter 4
PHP Programming Tutorial 17 - Delete data in Database using CodeIgniter 4
PHP Programming Tutorial 18 - Generate PDF in CodeIgniter 4
PHP Programming Tutorial 19 - Send Email using PHPMailer in CodeIgniter 4
PHP Programming Tutorial 20 - Upload a File in CodeIgniter 4
🔰 PHP Programming Tutorial 7 - Models in CodeIgniter 4 🔰
The Model is responsible for managing the data of the application. It receives user input from the Controller. It can contain functions to insert, update, and retrieve your application data. Model classes reside in the /app/Models/ directory. They can be nested within sub-directories. The basic syntax for the model is: Let's see the following example for a better understanding of the model: The file name must match the class name and the first letter of the Model class must be a capital letter. Initialize constructor: If your model is located in a sub-directory, include the relative path from your model’s directory. For example, if you have a model located at /app/Models/user/Profile.php you’ll load it using: Once the model is loaded, you can access all the public methods using an object with the same name as your class: Here is an example of a controller, that loads a model, then serves a view:
Introduction
<?php namespace App\Models; use CodeIgniter\Model; use CodeIgniter\Database\ConnectionInterface; class Model_name extends Model { protected $db; public function __construct(ConnectionInterface &$db) { $this->db =& $db; } } ?><?php namespace App\Models; use CodeIgniter\Model; use CodeIgniter\Database\ConnectionInterface; class BlogModel extends Model { protected $db; public function __construct(ConnectionInterface &$db) { $this->db =& $db; } public function add() { $data = [ 'title' => 'Title', 'description' => 'Description' ]; return $this->db ->table('blog_info') ->insert($data); } public function get_blog_list() { return $this->db ->table('blog_info') ->where(["status" => "1"]) ->get() ->getResult(); } }?> Load / Call a Model in Controller
use App\Models\model_name;public function __construct() { $db = db_connect(); $this->model = new model_name($db); }use App\Models\user\Profile; public function __construct() { $db = db_connect(); $this->profileModel = new Profile($db); }$this->profileModel>method();<?php namespace App\Controllers; use App\Controllers\BaseController; use App\Models\BlogModel; class Blog extends BaseController { public function __construct() { $db = db_connect(); $this->blogModel = new BlogModel($db); } public function index() { $data[‘list’] = $this->blogModel>get_blog_list(); echo view('about_us', $data); } } ?>Method methods
CodeIgniter 3 CodeIgniter 4 insert(); insert(); delete(); delete(); update(); update(); row(); getRow(); result(); getResult();
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