Login with google plus in codeigniter

How to log in with google plus in Codeigniter?

Why do you constantly design for login to your client/users on your system/site..? Why do they fill your long/short form and validate emails..? Nowadays, every person is busy, and they don't have time to fill out their forms for a single comment. It's a lengthy procedure to create an account on your application or site, so what is the solution..?

You can create a system so your user/client can log in with a single click; how it's possible..? You can generate a Login with a social network system, so your user/client easily log in with a single click.

Today, I will show you how to create a system login with google plus in CodeIgniter.

Requirements:

Google+ API

Codeigniter3

log in with the Google+ library in Codeigniter.

You can download all setups from Github.

Step1: Create a Project on console.developers.google.com

Step 2: Go to your application/config/autoload.php file and set these two libraries to autoload (session, google plus)  because we will use them in our controller.

You can check other files and folders.

application/libraries/Googleplus.php

application/third_party/google-login-API

Step 3: Go to application/config/ and create a file named googleplus.php and write this code inside your file.

Step 4: Create a controller named LoginWithGooglePlus.

<?php
defined('BASEPATH') OR exit('No direct script access allowed');
$config['googleplus']['application_name'] = ''";
$config['googleplus']['client_id'] = 'Your Client Id';
$config['googleplus']['client_secret'] = 'Your Client Secret';
$config['googleplus']['redirect_uri'] = 'Your redirect URL';
$config['googleplus']['api_key'] = '';
$config['googleplus']['scopes'] = array();

Step 5: Write an index method in your controller.

public function index(){
 if(isset($_GET['code']))//checking if the data is comming from API in code variable
 {
    $this->googleplus->getAuthenticate(); //generating token
    $this->session->set_userdata('login',true);//creating session
    $this->session->set_userdata('userProfile',$this->googleplus->getUserInfo());//creating session
    redirect('LoginWithGooglePlus/profile');//when we set the session we redirect the user to profile view
 }
 
  $data['loginURL'] = $this->googleplus->loginURL();//getting URL from calling API  
  $this->load->view('login',$data);
 }

Using this function $this->googleplus->getUserInfo() we are getting a user profile from gogole+ API.

Step 6: Create a file named login.php in your view folder and write these lines in this file.

<h1>Login with google PLus in codeigniter</h1>
<a href="<?php echo $loginURL;?>">
    Login With googlePlus
</a>

Step 7: Create a function/method named profile and write this code in this method.

public function profile(){
 if($this->session->userdata('login') == true)//checking session
 {
  $data['profileData'] = $this->session->userdata('userProfile'); //getting data from session ans storing.
  $this->load->view('profile',$data); //loading a view.
 }
 else
 {
   redirect('');
 }
}

Step 8: Create a file named profile.php in your view folder and write these lines.

Codeigniter Login with google plus <?php var_dump($profileData); //userdata ?>    ID: <?php echo $profileData['id']; ?>    Email: <?php echo $profileData['email']; ?>    Verified Email: <?php echo $profileData['verified_email']; ?>    Name: <?php echo $profileData['name']; ?>    Profile Picture: <img src="<?php echo $profileData['picture']; ?>">    <a href="<?php site_url('LoginWithGooglePlus/logout')?>;">Logout</a><!--This is the logout button->

Step 9: Create a function/method named log out and write this code.

public function logout(){
   $this->session->sess_destroy(); //destorying codeignier's session
   $this->googleplus->revokeToken(); //destorying google+ token
   redirect('');
}

In your controller, here is the complete code.

<?php
class LoginWithGooglePlus extends CI_Controller{
 
public function index(){
 
 if(isset($_GET['code']))
 {
    $this->googleplus->getAuthenticate();
    $this->session->set_userdata('login',true);
    $this->session->set_userdata('userProfile',$this->googleplus->getUserInfo());
    redirect('LoginWithGooglePlus/profile');
 }
 
    $data['loginURL'] = $this->googleplus->loginURL();
    $this->load->view('login',$data);

}
 
 public function profile(){
  if($this->session->userdata('login') == true)
  {
    $data['profileData'] = $this->session->userdata('userProfile');
    $this->load->view('profile',$data);
  }
 else
  {
    redirect('');
  }
}
public function logout(){

 public function logout(){
   $this->session->sess_destroy();
   $this->googleplus->revokeToken();
   redirect('');
  }
}//class ends here

https://www.youtube.com/watch?v=3wxkIM5Ypxg