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30 Top Codeigniter best Tutorials You must want to know.

Code Igniter is best framework and has an extensive community to help you always. Lot of tutorials are available  online. Here i have given some best tutorials.

 

Re-captcha is a free web service to add a secured captcha on your website to avoid spams. Spams filled up your inboxes with unnecessary emails or messages which you have no need. Re-captcha is provided by Carnegie Mellon University which are serving over 60 millions captchas in a day.

 

Here are some simple steps to complete this whole process.

 

1- Just go to re-captcha sign up page and enter your information. You need to add your site url there. And each of your site which you need to be deployed with re-captcha must have its domain name on your account in re-captcha site.

 

2- You will get public and private kep after entering your domain name and clicking on Create Key button. Save these codes into a notepad.

 

3- Download re-captcha library (recaptchalib.php) which will be used to interact with re-captcha API.

 

4- We will use this library as helper in codeigniter. Because this library holds a list of function which interacts re-captcha API. Paste this helper in to your system/application/helpers folder.

 

5- Now the work has been done at configuration level. Call your helper in controller.

 

 

6- In your controller, paste this code. Here the recaptcha_check_answer is used to get what code a user entered.

 

 

PHP

 
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function recaptcha_validation($string)
{
    $return = recaptcha_check_answer($this->config->item('private_recaptcha_key'),
                                    $_SERVER["REMOTE_ADDR"],
                                    $this->input->post("recaptcha"),
                                    $this->input->post("recaptcha"));
 
    if(!$return->is_valid)
       {
        $this->session->set_userdata("Mesg",'Code entered is invalid !');
        return FALSE;
    }
    else
       {
        return TRUE;
    }
}
 
function login_user_function()
{
    $this->load->library('validation');
    $this->load->helper('recaptcha_helper');
 
    $rules['recaptcha'] = 'required|callback_recaptcha_validation';
    $this->validation->set_rules($rules);
 
    $fields['recaptcha'] = 'Code';
    $this->validation->set_fields($fields);
 
    if($this->validation->run() == FALSE) {
       // code is not correct
    }
    else
       {
        // Code is verified now submit the form
    }
}
.

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