Facebook LOGIN ERROR AYUDA PHP

<?php
	

	# Start the session 
    	session_start();
	# Autoload the required files
	require_once __DIR__ . '/vendor/autoload.php';

	# Set the default parameters
	$fb = new Facebook\Facebook([
	  'app_id' => '129284427705486',
	  'app_secret' => 'b08b2cb086d211762b7587deafcde564',
	  'default_graph_version' => 'v2.5',
	]);
	$redirect = 'http://hola.com/sub/facebook/index.php';

	# Create the login helper object
	$helper = $fb->getRedirectLoginHelper();

	# Get the access token and catch the exceptions if any
	try {
	  $accessToken = $helper->getAccessToken();
	} catch(Facebook\Exceptions\FacebookResponseException $e) {
	  // When Graph returns an error
	  echo 'Graph returned an error: ' . $e->getMessage();
	  exit;
	} catch(Facebook\Exceptions\FacebookSDKException $e) {
	  // When validation fails or other local issues
	  echo 'Facebook SDK returned an error: ' . $e->getMessage();
	  exit;
	}

	# If the 
	if (isset($accessToken)) {
	  	// Logged in!
	 	// Now you can redirect to another page and use the
  		// access token from $_SESSION['facebook_access_token'] 
  		// But we shall we the same page

		// Sets the default fallback access token so 
		// we don't have to pass it to each request
		$fb->setDefaultAccessToken($accessToken);

		try {
		  $response = $fb->get('/me?fields=email,name,picture.width(250).height(250)');
		  $userNode = $response->getGraphUser();
		}catch(Facebook\Exceptions\FacebookResponseException $e) {
		  // When Graph returns an error
		  echo 'Graph returned an error: ' . $e->getMessage();
		  exit;
		} catch(Facebook\Exceptions\FacebookSDKException $e) {
		  // When validation fails or other local issues
		  echo 'Facebook SDK returned an error: ' . $e->getMessage();
		  exit;
		}

		$completename = $userNode->getName();
		$iduser = $userNode->getId();
		$username = str_replace(' ', '', $completename);
		$emailuser = $userNode->getProperty('email');
		$pictureuser = $userNode->getPicture();
		$picture = $pictureuser['url'];
		$userlocation = $userNode->getLocation();
		$bdconect = new Mysqli();
		$query = "SELECT * FROM users WHERE id = $iduser";
		$array = $bdconect->query($query);

		
		if($array->num_rows == 0){
			$query = "INSERT INTO users VALUES('".$iduser."','".$username."',NULL,NULL,'".$completename."','".$emailuser."','".$picture."',NULL,NULL,0,NULL,NULL)";
			$insertuserfb = $bdconect->query($query);
			if($insertuserfb->num_rows == 1){
				setSession($username,$iduser);
			}
			else{
				 setSession($username,$iduser);
			}

		}
		else{
			 setSession($username,$iduser);
		}
		
	}else{
		$permissions  = ['email'];
		$loginUrl = $helper->getLoginUrl($redirect,$permissions);
		header("Location: $loginUrl");
	}



	 function setSession($completename,$iduser){
		$_SESSION['username'] = $completename;
		$_SESSION['userid'] = $iduser;
		$_SESSION['picture'] = $picture;
                header('Location: webpage');

	}