Can't figure out how to get email from facebook PHP SDK -

i want capture users' email address when sign in site facebook. have following code:

session_start(); added in v4.0.0 require_once 'autoload.php'; /******function store users' value******/ require_once 'functions.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 app id , secret facebooksession::setdefaultapplication( '*****app id****','***secret key****' ); // login helper redirect_uri     $helper = new facebookredirectloginhelper('http://mykadamtala.com/facebook/fbconfig.php' );   try {   $session = $helper->getsessionfromredirect(); } catch( facebookrequestexception $ex ) {   // when facebook returns error } catch( exception $ex ) {   // when validation fails or other local issues } // see if have session if ( isset( $session ) ) {   // graph api request user data   $request = new facebookrequest( $session, 'get', '/me' );   $response = $request->execute();       // response         $graphobject = $response->getgraphobject();         $fbid = $graphobject->getproperty('id');              // facebook id         $firstname = $graphobject->getproperty('first_name');         $lastname = $graphobject->getproperty('last_name');         $fbfullname = $graphobject->getproperty('name');         $gender = $graphobject->getproperty('gender');         $femail = $graphobject->getproperty('email'); //this of course not work       /* ---- session variables -----*/         $_session['fbid'] = $fbid;           $_session['email'] =  $femail; //nothing stores here         $_session['gender'] = $gender;                      $_session['fullname'] = $fbfullname;          adduser($fbid,$firstname, $lastname, $femail);     /* ---- header location after session ----*/   header("location: index.php"); } else {   $loginurl = $helper->getloginurl();  header("location: ".$loginurl); } 

users' id , gender, first name, last name stored fine. email not captured. searching here got plug script:

 $getemail = $helper->getloginurl(array(    'scope' => 'email  )); 

but confused include , how store email in variable adduser() function can store email address in database. appreciate lot.

it belongs in last else block:

... else {   $loginurl = $helper->getloginurl(array(    'scope' => 'email'   ));   header("location: ".$loginurl); }