oshlo.blogspot.com - In this tutorial I will show you how to use the the codeigniter captcha helper. I use the session to save the captcha data instead of database.
ConfigurationDownload the CI latest version form codeigniter.com. Extract and rename as ci_captcha.
Open application/config/database.php, and change the following database configuration to fit your mysql configuration.
$config['hostname'] = “localhost”;
$config['username'] = “myusername”;
$config['password'] = “mypassword”;
$config['database'] = “mydatabase”;
$config['dbdriver'] = “mysql”;
Then open application/config/config.php
$config['base_url'] = ‘http://localhost/ci_captcha/’;
$config['encryption_key'] = '1234';
Open application/config/autoload.php
$autoload['libraries'] = array('database’,'session');
and
$autoload['helper'] = array(’form’);
Open application/config/routes.php, change default controller to home controller that we’ll create later on this tutorial.
$route['default_controller'] = ‘home’;
The last thing we need to do for this step is create a folder called captcha under the ci_captcha folder.
Creating Database tableWe need to create a table in our database. Import following SQL statement via phpMyAdmin or any other MySQL tool.
CREATE TABLE `message` ( `id` INT( 50 ) NOT NULL AUTO_INCREMENT , `username` VARCHAR( 50 ) NOT NULL , `message` TEXT NOT NULL , PRIMARY KEY ( `id` ) ) ENGINE = InnoDB
ControllerCreate a blank document in the controller file (application -> controller) and name it home.php, in the document add all the following code.
<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed'); class Home extends CI_Controller { public function __construct() { parent::__construct(); $this->load->model('home_model'); } public function index() { $this->load->helper('captcha'); $vals = array( 'img_path' => './captcha/', 'img_url' => 'http://localhost/ci_captcha/captcha/' ); $cap = create_captcha($vals); $data = array( 'captcha_time' => $cap['time'], 'ip_address' => $this->input->ip_address(), 'word' => $cap['word'] ); $this->session->set_userdata($data); $data['cap_img']=$cap['image']; $this->load->view('form_view',$data); } public function add_message() { $this->load->library('form_validation'); // field name, error message, validation rules $this->form_validation->set_rules('user_name', 'User Name', 'trim|required|min_length[3]'); $this->form_validation->set_rules('message', 'Message', 'trim|required|xss_clean'); $this->form_validation->set_rules('captcha', 'Security Code', 'trim|required|callback_check_captcha'); if($this->form_validation->run() == FALSE) { $this->index(); } else { $this->home_model->add_message(); } } public function check_captcha() { $expiration = time()-7200; // Two hour limit $cap=$this->input->post('captcha'); if($this->session->userdata('word')== $cap AND $this->session->userdata('ip_address')== $this->input->ip_address() AND $this->session->userdata('captcha_time')> $expiration) { return true; } else{ $this->form_validation->set_message('check_captcha', 'Security number does not match.'); return false; } } } ?> ViewCreate a blank document in the views file (application -> views) and name it form_view.php, in the document add all the following code.
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>Captcha in Codeigniter</title> </head> <body> <?php echo validation_errors('<p>'); ?> <?php echo form_open("home/add_message"); ?> <p> <label for="user_name">Name:</label> <input type="text" id="user_name" name="user_name" value="<?php echo set_value('user_name'); ?>" /> </p> <p> <label for="con_password">Message:</label> <textarea name="message" id="message" value="" cols="50" rows="4"></textarea> </p> <p> <?php echo $cap_img ?> <input type="text" id="captcha" name="captcha" value="" /> </p> <p> <input type="submit" value="Submit" /> </p> <?php echo form_close(); ?> </body> </html> ModelCreate a blank document in the models file (application -> models) and name it home_model.php, in the document add all the following code.
<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed'); class Home_model extends CI_Model { public function __construct() { parent::__construct(); } public function add_message() { $data=array( 'username'=>$this->input->post('user_name'), 'message'=>$this->input->post('message'), ); $this->db->insert('message',$data); } } ?> Now you have done a from with captcha. All above code is easy to follow and understand, isn't it? But if you have some trouble, don't hesitate to asked me.
other source : http://tutsforweb.blogspot.com, http://detik.com, http://kompas.com
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