Posts In "Codeigniter"

CodeIgniter is quite mature framework to creating web application, the built in libraries and helper very helpful to creating most feature in web application, this post I want to create very basic image gallery using CodeIgniter, the the built in libraries that I used are File Uploading, Image Manipulation and Pagination, whereas the used helper is URL Helper, and here’s we go

First open the config.php in folder system/application/config/ and set the CodeIgniter base_url

$config['base_url'] = "http://localhost/ci_gallery/";

Next load the URL Helper in autoload.php in the same folder as above file

$autoload['helper'] = array('url');

Now create the image controller in file image.php inside folder system/application/controller and add this attribute inside the image class

private $data = array(
    'dir' => array(
        'original' => 'assets/uploads/original/',
        'thumb' => 'assets/uploads/thumbs/'
    ),
    'total' => 0,
    'images' => array(),
    'error' => ''
);

Like another tutorial this post will create the basic form login and register using Extjs and Codeigniter, and I want to mix my previous post about Codeigniter Session Library, Extjs Unique Field Validation and using Statusbar in Extjs Window.

1. Setting up the database

Using phpmyadmin in XAMPP I create the database named “ci_extjs_login”, and create simple “users” table, here below is the sql code that I generated from phpmyadmin, for more advance database modelling you can use mysql workbench.

CREATE TABLE  `ci_extjs_login`.`users` (
`id` INT NOT NULL AUTO_INCREMENT PRIMARY KEY ,
`username` VARCHAR( 100 ) NOT NULL ,
`password` VARCHAR( 100 ) NOT NULL ,
`email` VARCHAR( 100 ) NOT NULL
) ENGINE = MYISAM ;

Codeigniter recently is my favorite PHP framework, it’s has really small learning curve to get move on, here list of content management system built on codeigniter, hope this useful whether you want to use it for your simple site or you can learn more about codeigniter by exploring the code. Personally I explore it to knowing how people write code in codeigniter.

When we build web application with user authentification, the application must have user login/logout or signin/signout or whatever you called it, then the system must have user logged feature to check whether the user is logged in or logged out. Session is the most common way to checking it. In Codeigniter, using Session Class you can use simple function inside controller, it’s something like this:

class User extends Controller {

	// constructor class
	function __construct()
	{
		parent::Controller();
		$this->load->library('session');
	}

	function index()
	{
		$this->load->view('user/index');
	}

	function login()
	{
		// if user already logged in, redirect to user index
		if ($this->_is_logged_in())
		{
			redirect('user/index');
		}
		else
		{
			$this->load->view('user/login');
		}
	}

	function register()
	{
		// if user already logged in, redirect to user index
		if ($this->_is_logged_in())
		{
			redirect('user/index');
		}
		else
		{
			$this->load->view('user/register');
		}
	}

	// checking user logged user by registered session
	function _is_logged_in()
	{
		$logged = $this->session->userdata('user_id');
		if ($logged)
		{
			return TRUE;
		}
		else
		{
			return FALSE;
		}
	}
}