How to check if a user has granted a certain set of permissions to my PHP app?

Question

Based on this question, is there a way to check if a user has granted a certain set of permissions to an app using PHP based Facebook SDK? I've browsed the API but couldn't find anything.

Answer 1

$permissions = $facebook->api("/me/permissions");

then use the if to check which permission you need

EX:

if (array_key_exists('publish_stream', $permissions['data'][0])) {
    postToWall();
} else {
    //Does not have permission
}

If you are using FQL

$perms = $facebook->api(array(
    "method" => "fql.query",
    "query" => "SELECT read_stream,offline_access,publish_stream FROM permissions WHERE uid=me()"
        ));
echo "<ul>";
foreach ($perms[0] as $k => $v) {
    echo "<li>";
    if ($v === "1") {
        echo "<strong>$k</strong> permission is granted.";
    } else {
        echo "<strong>$k</strong> permission is not granted.";
    }
    echo "</li>";
}

http://www.masteringapi.com/tutorials/how-to-check-if-user-has-certian-permission-facebook-api/22/

Answer 2

This also worked for me, in cases when I didn't have an access token, but had the user's ID:

$isGranted = $facebook->api(array(
    "method"    => "users.hasAppPermission",
    "ext_perm"   => "publish_stream",
    "uid"       => $facebook_id
));