Oauth Login for Linkedin, Facebook, Google and Microsoft

Database
Users table database design.

CREATE TABLE IF NOT EXISTS `users`
(
id INT(11) NOT NULL AUTO_INCREMENT,
email VARCHAR(200) ,
name VARCHAR(200) ,
first_name VARCHAR(200) ,
last_name VARCHAR(200) ,
gender VARCHAR(10) ,
birthday VARCHAR(20) ,
location VARCHAR(200) ,
hometown VARCHAR(200) ,
bio TEXT,
relationship VARCHAR(30) ,
timezone VARCHAR(10) ,
provider VARCHAR(10) ,
provider_id INT(30) ,
picture TEXT,
PRIMARY KEY (`id`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1 AUTO_INCREMENT=8 ;

The script contains three folders called facebook_lib, google_lib, microsoft_lib,linkedin_lib and images with PHP files.

facebook_lib //Facebook OAUTH library 
-- config.php //Facebook app configuration file.
google_lib //Google OAUTH library 
-- config.php //Google app configuration file.
microsoft_lib //Microsoft OAUTH library 
-- config.php //Microsoft app configuration file.
linkedin_lib //Linkedin OAUTH library 
-- config.php //Linkedin app configuration file.
images
db.php //Database connection 
OauthLogin.php //Class 
facebook_login.php //Facebook Login
google_login.php //Google Login
microsoft_login.php //Microsoft Login
linkedin_login.php //Linkedin Login
index.php
home.php
header.php
redirect.php
logout.php

How to Use
Just call anchor tag with particular service login file. 

<a href='facebook_login.php'>Facebook Login</a>
<a href='google_login.php'>Google Login</a>
<a href='microsoft_login.php'>Microsoft Login</a>
<a href='linkedin_login.php'>Linkedin</a>

How it Works
Facebook & Google Authentication Flowchart

Installation
In this script just you have to modify three file.

db.php
Database configuration file, modify MySQL server details.

<?php
$mysql_hostname = "localhost";
$mysql_user = "username";
$mysql_password = "password";
$mysql_database = "databasename";
$bd = mysql_connect($mysql_hostname, $mysql_user, $mysql_password) or die("Could not connect database");
mysql_select_db($mysql_database, $bd) or die("Could not select database");
$base_url='http://www.yourwebsite.com/';
?>

Application setup details click here.

Facebook Configuration facebook_lib/config.php
You have to create a application. Facebook will provide you app id and app secret id, just replace in the following code.
fbconfig.php

<?php
$facebook_appid='App ID';
$facebook_app_secret='App Secret';
$facebook_scope='email,user_birthday';
$facebook = new Facebook(array(
'appId' => $facebook_appid,
'secret' => $facebook_app_secret,
));
?>

Google Configuration google_lib/config.php
You can find this in google_lib folder, here you have to configure application OAuth keys, Consumer keys and redirection callback URL.

// OAuth2 Settings, you can get these keys at https://code.google.com/apis/console Step 6 keys 
'oauth2_client_id' => 'Client ID',
'oauth2_client_secret' => 'Client Secret',
'oauth2_redirect_uri' => 'http://www.yoursite.com/google_login.php',

// OAuth1 Settings Step 3  keys.
'oauth_consumer_key' => 'OAuth Consumer Key',
'oauth_consumer_secret' => 'OAuth Consumer Secret',

Microsoft Configuration microsoft_lib/config.php
Click here to launch Microsoft live development dashboard and create an application. Microsoft will provide you Client_Id and Client_Secret.
fbconfig.php

<?php

//Microsoft Application Settings
$microsoft_client_id='Client ID';
$microsoft_client_secret='Client Secret';
$microsoft_scope='wl.basic wl.emails wl.birthday';
$microsoft_redirect_url=$base_url.'microsoft_login.php';

));
?>

Linkedin Configuration linkedin_lib/config.php
Click here to launch Linkedin developer network and application will provide your App_Key and App_Secret. 
fbconfig.php

<?php

//Linkedin Application Settings
$linkedin_appKey='App Key';
$linkedin_appSecret='App Secret';
$linkedin_callbackUrl=$base_url.'linkedin_login.php';

));
?>

Oauth Login for Linkedin, Facebook, Google and Microsoft