Facebook Graph API not returning email - facebook

Question

I have the following code:
$fb = new Facebook([
'app_id' => $appId,
'app_secret' => $appSecret,
'default_graph_version' => 'v2.9',
]);
$oAuth2Client = $fb->getOAuth2Client();
$tokenMetaData = $oAuth2Client->debugToken($accessToken);
dump($tokenMetaData);
$graphUser = $fb->get('/me?fields=first_name,last_name,email', $accessToken)->getGraphUser()->asArray();
dump($graphUser);
The output for the above is the following:
$metaData:
[
"app_id" => "..."
"application" => "My App Name"
"expires_at" => "2017-07-01 11:40:09.000000"
"is_valid" => true
"issued_at" => "2017-05-02 11:40:09.000000"
"metadata" => array:2 [
"auth_type" => "rerequest"
"sso" => "ios"
]
"scopes" => array:2 [
0 => "email"
1 => "public_profile"
]
"user_id" => "102..."
]
}
$graphUser:
array:3 [
"first_name" => "John"
"last_name" => "Smith"
"id" => "102...",
]
As you can see, the scopes in $metaData clearly has email so it isn't a permission issue. Despite this, the graph user sometimes does not have the email (although in some cases it does).
Why is this and how can I solve this issue?

Answer 1

Add the fields you need to the URL of your request:
https://graph.facebook.com/me?fields=email,name

Answer 2

First check if your access token gets the user's permission for the email
https://graph.facebook.com/me/permissions?
access_token=(access-token)
&debug=all
if in the answer, this content does not appear:
{
"data": [
{
"permission": "email",
"status": "granted"
},
{
"permission": "public_profile",
"status": "granted"
}
]
}
Maybe in obtaining your access token I do not request mail ownership: Add scope=email to the request
https://www.facebook.com/v2.10/dialog/oauth?
client_id=(app-id)
&redirect_uri=(redirect-uri)
&scope=email

Answer 3

One possibility which i came across today is, if i am registering a account where i am not logging in using my email ID, may be using mobile number to login, and even in my profile primary email is not set or set to a mobile number, in this case facebook returns null for email.
I have updated the account and added email to primary email field under settings in facebook page, then i was able to get the email id from facebook.
Hope this helps someone.
Happy coding...

Answer 4

You have to check these steps.
check if your access token gets the user's permission for the email . for that login to your developer account of your app, then tools->graph api explorer then enable user's permission for the email.
check the facebook version, use the latest version.
add email scope in face book login script as below
app.get(
'/auth/facebook',
passport.authenticate('facebook', {
scope: ['user_location', 'email', 'user_friends']
})
);
or
FB.login(function(response) {
// your ajax script
},{
scope: 'email',
return_scopes: true
});

Answer 5

Goto your app > App review > Permissions and Features
Request Advanced access for email which should turn Standard Access into Advanced Access

Answer 6

I solved this issue by specifying the graph api version.
My requested fields first_name,last_name,email,picture
To url: https://graph.facebook.com/me
Did NOT return email.
To url: https://graph.facebook.com/v2.9/me
Did return email.
Hope this helps.