How can I convert this code to Facebook SDK v4? - php

Question

I need help how can I convert this code into SDKv4. Cause this code is not working already and giving me redirect loop or something about looping of redirects.
<?php
require '../config.php';
require 'lib/facebook/facebook.php';
$facebook = new Facebook(array(
'appId' => $appID,
'secret' => $appSecret,
));
//get the user facebook id
$user = $facebook->getUser();
if($user){
try{
//get the facebook user profile data
$getUserInfo = $facebook->api('/me');
$params = array('next' => $base_url.'logout.php');
//logout url
$logout =$facebook->getLogoutUrl($params);
}catch(FacebookApiException $e){
error_log($e);
$user = NULL;
}
}
if(!empty($user)){
//login url
$userInfo = $getUserInfo;
$_SESSION['ses_id'] = md5(microtime());
$buid = $userInfo['id'];
$user = mysql_query("SELECT * FROM `scgfx_user_accounts` WHERE `fbid`='".$buid."'");
if(mysql_num_rows($user)>0) {
$userdata = mysql_fetch_assoc($user);
if($userdata['last_request_time']<=(time()-10800)) {
mysql_query("INSERT INTO `scgfx_chats` VALUES('','Welcome back to ".GLOBAL_NAME." <b>".$userdata['fbname']."</b>','0','global','".time()."')");
}
mysql_query("UPDATE `scgfx_user_accounts` SET
`gender` = '".$userInfo['gender']."',
`ses_id` = '".$_SESSION['ses_id']."',
`active` = '1',
`sign_time` = CURRENT_TIMESTAMP,
`last_request_time` = '".time()."',
`ip_address` = '".$_SERVER['REMOTE_ADDR']."' WHERE `fbid`='".$userInfo['id']."'");
} else {
mysql_query("INSERT INTO `scgfx_user_accounts` VALUES('',
'".$userInfo['id']."',
'".$userInfo['name']."',
'".$userInfo['gender']."',
'0',
'".$_SESSION['ses_id']."',
'1',
CURRENT_TIMESTAMP,
'".time()."',
'".$_SERVER['REMOTE_ADDR']."','0','0')");
mysql_query("INSERT INTO `scgfx_chats` VALUES('','We have a new member :) Welcome to ".GLOBAL_NAME." <b>".$userInfo['name']."</b>!<br/>Enjoy your stay!','0','global','".time()."')");
}
if(isset($_SESSION['ses_id'])) {
$getUserInfo = mysql_query("SELECT * FROM `scgfx_user_accounts` WHERE `ses_id`='".$_SESSION['ses_id']."'");
if(mysql_num_rows($getUserInfo)>0) {
while($data=mysql_fetch_assoc($getUserInfo)) {
$_SESSION['fbid'] = $data['fbid'];
$_SESSION['name'] = $data['fbname'];
$_SESSION['gender'] = $data['gender'];
$_SESSION['acctype'] = $data['acctype'];
$_SESSION['points'] = $data['points'];
}
} else {
die("Invalid Session ID");
}
?>
<script>
window.close();
window.opener.location.reload();
</script>
<?php
}
}
else {
$loginurl = $facebook->getLoginUrl(array(
'scope' => 'email,read_stream,offline_access,publish_stream,user_status,user_photos',
'display'=>'popup'
));
header('Location: '.$loginurl);
}
?>
<!-- after authentication close the popup -->
I think this is the only way I can get this code working.

Answer 1

I would try something like this:
use Facebook\FacebookSession;
use Facebook\FacebookRequest;
use Facebook\FacebookRequestException;
use Facebook\FacebookRedirectLoginHelper;
use Facebook\GraphUser;
session_start();
FacebookSession::setDefaultApplication('app-id','app-secret');
$helper = new FacebookRedirectLoginHelper('this-same-url');
$session = $helper->getSessionFromRedirect();
if($session){
$user_profile = (new FacebookRequest(
$session, 'GET', '/me'
))->execute()->getGraphObject(GraphUser::className());
echo "Name: " . $user_profile->getName();
echo 'Token: ' . $session->getToken() . '<br/>';
} else {
// Create here your login button
$loginUrl = $helper->getLoginURL(array('public_profile,'));
echo("Login URL:");
echo($loginUrl);
}
Please note that this is a rough sketch and you should never echo the user token. For a more detailed explanation, please read https://developers.facebook.com/docs/php/gettingstarted/4.0.0