PHP - Graph API 2.8 not requesting email - php

Question

I'm integrating FB login on my website and for that I need the email of the user. Here's part of the code
$fb = new Facebook\Facebook([
'app_id' => 'app-id',
'app_secret' => 'secret',
'default_graph_version' => 'v2.8',
]);
$helper = $fb->getJavaScriptHelper();
try {
$accessToken = $helper->getAccessToken();
} catch(Facebook\Exceptions\FacebookResponseException $e) {
// When Graph returns an error
echo 'Graph returned an error: ' . $e->getMessage();
} catch(Facebook\Exceptions\FacebookSDKException $e) {
// When validation fails or other local issues
echo 'Facebook SDK returned an error: ' . $e->getMessage();
}
if (isset($accessToken)) {
$fb->setDefaultAccessToken($accessToken);
try {
$requestProfile = $fb->get("/me?fields=name,email");
$profile = $requestProfile->getGraphNode()->asArray();
} catch(Facebook\Exceptions\FacebookResponseException $e) {
// When Graph returns an error
echo 'Graph returned an error: ' . $e->getMessage();
} catch(Facebook\Exceptions\FacebookSDKException $e) {
// When validation fails or other local issues
echo 'Facebook SDK returned an error: ' . $e->getMessage();
}
print_r($profile);
}
What I'm getting back is name and id. Even the popup that requests users to grant permissions to the app doesnot ask for the email. And understandably it doesn't return it as well.
I've seen this and many other questions but none of the solutions have worked for me. What am I doing wrong?

Answer 1

You need to request permission to obtain the user email.
Please review https://developers.facebook.com/docs/php/howto/example_facebook_login to see how to request it (e.g.: permissions = ['email', 'user_likes', 'user_location', 'user_friends', 'user_birthday', 'user_hometown'];)
Refer to https://developers.facebook.com/docs/facebook-login/permissions for the permission reference and https://github.com/thephpleague/oauth2-facebook for more example.

Answer 2

Thanks to CBroe who pointed this out in the comments above, the permissions were supposed to be set in the javascript, not the php. It's because the php code is run when the authorization is complete and you have received all information you were supposed to.
To fix it, I changed
FB.login(function(response){
// take action based on response
});
To
FB.login(function(response){
// take action based on response
}, {scope: 'public_profile, email'});
And it works now. Thanks