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PHP TUTOTRIAL : LOGIN WITH OPEN ID

Tutorial by:Manisha Dubey      Date: 2016-09-02 23:06:49

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We can use Facebook login to allow the users to get access into the websites. This page will explain you about login with facebook PHP SDK.

Login With Facebook

  • Need to go https://developers.facebook.com/apps/ and click on add a new group button to make the app ID.

  • Choose Website

  • Give an app name and click on Create New Facebook App ID

  • Click on Create app ID

  • Click on Skip Quick Test

On Final stage, it will show as below shown image.

facebook

fbconfig.php file overview

  • Now download zip from here
  • Now open fbconfig.php file and add you app ID and app Secrete
FacebookSession::setDefaultApplication( 'your app ID','App Secrete ' );
// login helper with redirect_uri
   $helper = new FacebookRedirectLoginHelper('You web address' );

Finally fbconfig.php file as shown below −

<?php
   
   session_start();
   
   // added in v4.0.0
   require_once 'autoload.php';
   use Facebook\FacebookSession;
   use Facebook\FacebookRedirectLoginHelper;
   use Facebook\FacebookRequest;
   use Facebook\FacebookResponse;
   use Facebook\FacebookSDKException;
   use Facebook\FacebookRequestException;
   use Facebook\FacebookAuthorizationException;
   use Facebook\GraphObject;
   use Facebook\Entities\AccessToken;
   use Facebook\HttpClients\FacebookCurlHttpClient;
   use Facebook\HttpClients\FacebookHttpable;
   
   // init app with app id and secret
   FacebookSession::setDefaultApplication( '496544657159182','e6d239655aeb3e496e52fabeaf1b1f93' );
   
   // login helper with redirect_uri
   $helper = new FacebookRedirectLoginHelper('http://www.aitechtonic.com/' );
   
   try {
      $session = $helper->getSessionFromRedirect();
   }
   
   catch( FacebookRequestException $ex ) {
      // When Facebook returns an error
   }
   
   catch( Exception $ex ) {
      // When validation fails or other local issues
   }
   
   // see if we have a session
   if ( isset( $session ) ) {
      // graph api request for user data
      $request = new FacebookRequest( $session, 'GET', '/me' );
      $response = $request->execute();
      
      // get response
      $graphObject = $response->getGraphObject();
      $fbid = $graphObject->getProperty('id');           // To Get Facebook ID
      $fbfullname = $graphObject->getProperty('name');   // To Get Facebook full name
      $femail = $graphObject->getProperty('email');      // To Get Facebook email ID
      
      /* ---- Session Variables -----*/
      $_SESSION['FBID'] = $fbid;
      $_SESSION['FULLNAME'] = $fbfullname;
      $_SESSION['EMAIL'] =  $femail;
      
      /* ---- header location after session ----*/
      header("Location: index.php");
   }
   else
   {
      $loginUrl = $helper->getLoginUrl();
      header("Location: ".$loginUrl);
   }
?>

Login page Overview

Login page is used to login into FB

<?php
   session_start();
   session_unset();
   
   $_SESSION['FBID'] = NULL;
   $_SESSION['FULLNAME'] = NULL;
   $_SESSION['EMAIL'] =  NULL;
   header("Location: index.php");        
?>

Index.php

Index page is as shown below.

<?php
   session_start(); 
?>
<html xmlns:fb="http://www.facebook.com/2008/fbml">
   
   <head>
      <title>Login with Facebook</title>
      <link href="http://www.bootstrapcdn.com/twitter-bootstrap/2.2.2/css/bootstrap-combined.min.css" rel="stylesheet">
   </head>
   
   <body>
      <?php if ($_SESSION['FBID']): ?>      <!--  After user login  -->
         
         <div class="container">
            
            <div class="hero-unit">
               <h1>Hello <?php echo $_SESSION['USERNAME']; ?></h1>
               <p>Welcome to "facebook login" tutorial</p>
            </div>
            
            <div class="span4">
				
               <ul class="nav nav-list">
                  <li class="nav-header">Image</li>
						
                  <li><img src="https://graph.facebook.com/<?php echo $_SESSION['FBID']; ?>/picture"></li>
                  
                  <li class="nav-header">Facebook ID</li>
                  <li><?php echo  $_SESSION['FBID']; ?></li>
               
                  <li class="nav-header">Facebook fullname</li>
						
                  <li><?php echo $_SESSION['FULLNAME']; ?></li>
               
                  <li class="nav-header">Facebook Email</li>
						
                  <li><?php echo $_SESSION['EMAIL']; ?></li>
               
                  <div><a href="logout.php">Logout</a></div>
						
               </ul>
					
            </div>
         </div>
         
         <?php else: ?>     <!-- Before login --> 
         
         <div class="container">
            <h1>Login with Facebook</h1>
            Not Connected
            
            <div>
               <a href="fbconfig.php">Login with Facebook</a>
            </div>
            
            <div>
               <a href="http://www.aitechtonic.com"  title="Login with facebook">More information about aitechtonic</a>
            </div>
         </div>
         
      <?php endif ?>
      
   </body>
</html>

It will produce the result here. Before trying this example, please logout your face book account in your browser.

Logout Facebook

Below code is used to logout facebook.

<?php 
   session_start();.
   session_unset();
   
   $_SESSION['FBID'] = NULL;
   $_SESSION['FULLNAME'] = NULL;
   $_SESSION['EMAIL'] =  NULL;
   header("Location: index.php");        
?>




PHP - PayPal Integration

PayPal is a payment processing system, We can integrate PayPal with websites by using with php.

PayPal integration file system

PayPal integration file system included 4 files as shown below.

  • constants.php − This file has included API user name, password and signature.

  • CallerService.php − This file has included PayPal Services, which is used to call PayPal services.

  • confirmation.php − This file has included a form with minimum fields required to make payment process and it will return payment success or failure.

  • PayPal_entry.php − This page has used to send the user the data to PayPal. It acts as an adapter between PayPal and user form.

The user has to download a PayPal SDK file from here and exact a zip file. The zip file contains four php files, We don't need to change any file except constants.php

The constants.php file contains code as shown below −

<?php
   define('API_USERNAME', 'YOUR USER NAME HERE');
   define('API_PASSWORD', 'YOUR PASSWORD HERE');
   define('API_SIGNATURE', 'YOUR API SIGNATURE HERE');
   define('API_ENDPOINT', 'https://api-3t.paypal.com/nvp');
   define('USE_PROXY',FALSE);
   define('PROXY_HOST', '127.0.0.1');
   define('PROXY_PORT', '808');
   define('PAYPAL_URL', 'https://www.PayPal.com/webscr&cmd=_express-checkout&token=');
   define('VERSION', '53.0');
?>

The user will declare User Name, password and signature in above syntax which are placed in constants.php. This is an experimental example so the last amount will be added to sandbox's account.




PHP MySQL Login

This tutorial demonstrates how to create a login page with MySQL Data base. Before enter into the code part, You would need special privileges to create or to delete a MySQL database. So assuming you have access to root user, you can create any database using mysql mysqladmin binary.

Config.php

Config.php file is having information about MySQL Data base configuration.

<?php
   define('DB_SERVER', 'localhost:3036');
   define('DB_USERNAME', 'root');
   define('DB_PASSWORD', 'rootpassword');
   define('DB_DATABASE', 'database');
   $db = mysqli_connect(DB_SERVER,DB_USERNAME,DB_PASSWORD,DB_DATABASE);
?>

Login.php

Login PHP is having information about php script and HTML script to do login.

<?php
   include("config.php");
   session_start();
   
   if($_SERVER["REQUEST_METHOD"] == "POST")
   {
      // username and password sent from form 
      
      $myusername=mysqli_real_escape_string($db,$_POST['username']);
      $mypassword=mysqli_real_escape_string($db,$_POST['password']); 
      
      $sql="SELECT id FROM admin WHERE username='$myusername' and passcode='$mypassword'";
      $result=mysqli_query($db,$sql);
      $row=mysqli_fetch_array($result,MYSQLI_ASSOC);
      $active=$row['active'];
      
      $count=mysqli_num_rows($result);
      
      // If result matched $myusername and $mypassword, table row must be 1 row
		
      if($count==1)
      {
         session_register("myusername");
         $_SESSION['login_user']=$myusername;
         
         header("location: welcome.php");
      }
      else 
      {
         $error="Your Login Name or Password is invalid";
      }
   }
?>
<html>
   
   <head>
      <title>Login Page</title>
      
      <style type="text/css">
         body {
            font-family:Arial, Helvetica, sans-serif;
            font-size:14px;
         }
         
         label {
            font-weight:bold;
            width:100px;
            font-size:14px;
         }
         
         .box {
            border:#666666 solid 1px;
         }
      </style>
      
   </head>
   
   <body bgcolor="#FFFFFF">
	
      <div align="center">
         <div style="width:300px; border: solid 1px #333333; " align="left">
            <div style="background-color:#333333; color:#FFFFFF; padding:3px;"><b>Login</b></div>
				
            <div style="margin:30px">
               
               <form action="" method="post">
                  <label>UserName  :</label><input type="text" name="username" class="box"/><br /><br />
                  <label>Password  :</label><input type="password" name="password" class="box" /><br/><br />
                  <input type="submit" value=" Submit "/><br />
               </form>
               
               <div style="font-size:11px; color:#cc0000; margin-top:10px"><?php echo $error; ?></div>
					
            </div>
				
         </div>
			
      </div>

   </body>
</html>

welcome.php

After successful login, it will display welcome page.

<?php
   include('session.php');
?>
<html">
   
   <head>
      <title>Welcome </title>
   </head>
   
   <body>
      <h1>Welcome <?php echo $login_session; ?></h1> 
      <h2><a href="logout.php">Sign Out</a></h2>
   </body>
   
</html>

Logout page

Logout page is having information about how to logout from login session.

<?php
   session_start();
   if(session_destroy())
   {
      header("Location: login.php");
   }
?>

session.php

Session.php will verify the session, if there is no session it will redirect to login page.

<?php
   include('config.php');
   session_start();
   
   $user_check=$_SESSION['login_user'];
   
   $ses_sql=mysqli_query($db,"select username from admin where username='$user_check' ");
   
   $row=mysqli_fetch_array($ses_sql,MYSQLI_ASSOC);
   
   $login_session=$row['username'];
   
   if(!isset($_SESSION['login_user'])){
      header("location:login.php");
   }
?>

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